Bloom Reports from the Anza-Borrego Desert: 2010-2011

Bigelow's monkeyflower, Mimulus bigelovii
Photograph of field of Mimulus bigelovii
glandular nemacladus, Nemacladus glanduliferus
Photograph of Nemacladus glanduliferus

Pictures of two annual plants taken on 19 January 2011 in Harper Canyon. The Mimulus plant is about the size of your hand; the Nemacladus flower is only a few mm (0.1 inch) across (note the pen tip for scale)

Recent updates to this page:

Table of Contents

Rainfall This Season

Annual Germination, Growth and Blooms
     General Requirements for Annual Germination
     Bad Bloom Years Are All The Same; Good Bloom Years Are All Different
     Peak Bloom: What Does That Mean?
     Summary of Annual Germination, Growth and Blooms in 2010-2011

          Map showing the best and worst bloom locations

          Bloom update for various locations

     Detailed Germination, Growth and Bloom Reports From Each Hike
     Pictures From Each Hike

How Long Will An Annual Bloom Last
     General Factors
     Predictions for This Year

Species in Bloom On Each Trip
     Number of Species and Plants in Bloom On Each Trip
     List of Species in Bloom On Each Trip, With Photographs
     Pictorial Gallery of Species in Bloom To Date in 2009-2010, organized by flower color

Links to Other Webpages on Anza-Borrego Desert State Park Blooms


I've expanded the scope of this bloom report page in 2010-2011 to include a larger area of the Anza-Borrego Desert State Park and nearby areas, since I plan on botanizing a larger desert area this season than I have in years past. Pages for 2008-2009 and 2009-2010 were restricted to the Borrego Desert portion of the Park.

In all cases, these pages only give the bloom status below 3000 feet elevation. Most observations are typically at about 1000 feet elevation.

This page gives information about the 2010-2011 bloom for all species in this area, with emphasis on the annuals that are responsible for the widespread showy blooms that appear in some years on the desert floor. The date of the last update to the text of this page is given at the bottom of this page. However, the plots below showing the progress of the bloom are always kept up to date, even if this page hasn't been recently updated otherwise.

The plots below also show the progress of the bloom in 2008-2009 and 2009-2010. For detailed progress of the bloom in those years, see 2009-2010 Blooms and the links therein.

In addition to specific information about current conditions, this page also gives some general information on what is needed to germinate those annuals, and what is needed to sustain the annual bloom.

The information here is by no means a definitive list to what is blooming at all locations in the Anza-Borrego Desert; it only records the species I've seen in bloom on my trips that occur roughly every fourth day, occasionally augmented by observations from other people. Because the locations change, the numbers of species in bloom, and the number of plants in bloom, cannot usually be directly compared from trip to trip. However, the information here will give the reader an idea of what the bloom is doing in the Anza-Borrego Desert.

Note that there is often quite a difference in the annual bloom between the moister canyons west of Borrego Springs and the drier areas around the Badlands. Similarly, even within those canyons on the west, there can be large differences between the north-facing and south-facing slopes, and between canyons with permanent water, like Borrego Palm Canyon, and drier canyons. In the drier areas to the east, there can be large differences between the edges of washes and the middle of washes, and between shady canyons and open areas. Location matters!. See latest bloom map for the best and worst bloom locations du jour.

The locations for each hike are in the detailed reports below; sometimes more information is given in Botanical Trail Reports in Chronological Order, which usually include more information about the bloom on each trip.

Rainfall This Season

Rainfall is the most important determinant of blooms. Rainfall is usually highest on the mountain slopes, especially on the west edge of the Borrego Desert, and falls off dramatically with lower elevation to the east. This occurs whenever our rainfall is mostly orographic. However, when rainfall is from convection, the deserts can at times get more rainfall than the coast. (See Precipitation types.)

In addition to desert stations, I've also given the rainfall from my house in Fallbrook, on the coastal side at 680 feet elevation, to show the large difference in rainfall between the wet side of the mountains and the dry side.

Table 1 gives the storm totals, in inches, as of the last day of each storm. The storm totals were taken from the Weather Service Rainfall Storm Summary, except for Fallbrook and the Borrego Badlands / Ocotillo Wells. Occasionally other stations are missing in that report; if so, totals are taken from the Rainfall Summary Map. Rainfall reports for Ocotillo Wells are reported at here for the month to date.

If a station didn't appear in the summary, or I couldn't find it elsewhere on line, I usually assumed the rainfall total was zero. Although this assumption is probably usually correct, it is not necessarily always valid since missing data plague all rain reports. In a few cases, when it was clear that some rainfall must have been received at those missing stations, I've guesstimated the rainfall.

Note that the total rainfall at the bottom of the table is since 1 October, since rain that falls earlier doesn't germinate the desert annuals (see below). This rainfall total may be different from the rainfall reported by the Anza-Borrego Desert State Park Visitor Center using the normal California rainfall year that begins on 1 July. Also, the total rainfall also contains rainfall in Fallbrook not reported in the table if there was no major rainfall in the desert.

Table 1. Major Rainfall Events in the Desert Since 1 October 2010

End DateFallbrookSan FelipeAgua CalienteBorrego Palm CanyonBorrego SpringsOcotillo Wells
Total All Rain16.803.232.334.653.522.01

On 11/24/10, the Visitor Center billboard reported 2.44 inches of rain, compared to the total above of 1.57 inches from the National Weather Service station in Borrego Springs. This may be due to differences in rainfall between stations, or due to rainfall prior to 10/1/10.

Annual Germination, Growth and Blooms

General Requirements for Annual Germination

The timing of rainfall is extremely important for the annual bloom. Rainfall received in the summer and early fall will not germinate the annuals that bloom in February and March. Rainfall received after January will either not germinate those annuals, or will germinate them too late for them to produce a robust bloom in most years. Thus rain must fall in October, November, and/or December in order to germinate the annuals that produce the showy mass displays.

The amount in a single storm is also important. Native annuals require about an inch of rainfall, received over no longer than a period of something like several days, in order to germinate. Our native annuals have learned the hard way that any less rainfall doesn't guarantee enough moisture in the soil for them to produce seeds.

Unfortunately, non-native annuals can germinate on less rainfall, and can sometimes get a head start over our native annuals if we get a first rainfall much less than an inch.

See Predicting Desert Wildflower Blooms - The science behind the spectacle from the Arizona-Sonora Desert Museum for information relating to Arizona desert blooms. Many of our annual species respond a bit differently, since we have much less monsoonal rain and more winter rain, but some of our species follow the Arizona rules.

Bad Bloom Years Are All The Same; Good Bloom Years Are All Different

Janice Emily Bowers, with her vast experience in desert blooms, said it best in her book Flowers and Shrubs of the Mojave Desert, 1998, p. 4:

... maybe one in five [springs] will bring a good wildflower display. All bad springs are more or less alike in that wildflowers are scarce or not to be seen, but all good years are different in that no two have the same abundance of flowers or the same combinations of species. This is because different kinds of annual wildflowers have different requirements for germination and growth.

This is just as true for the Borrego and Sonoran Deserts.

Peak Bloom: What Does That Mean?

The term Peak Bloom means different things to different people:

Most of the time, I use the latter definition of Peak Bloom, but I also try to mention when the carpets of flowers are present.

If you are looking for a particular species in bloom, the time of Peak Bloom doesn't matter to you; you want to know only when that species is in bloom. Plant species bloom at different times; it is not possible to see every species in bloom even over the time period of a month.

For example, if you want to see the beautiful blooms of beavertail cactus, Opuntia basilaris, you'll need to come just after the showy annual carpets are finished. If you want to see the beautiful flowers of desert-willow, Chilopsis linearis ssp. arcuata, then you'll need to come here in summer, when few species are blooming except for it.

See observed dates of peak bloom in 2008-2009 and in 2009-2010 for various locations.

These annual species produce the showy carpets of flowers:

Other annuals can produce carpets of flowers, but are either more limited in their distribution, such as Bigelow's monkeyflower, Mimulus bigelovii, or purple mat, Nama demissum; or don't produce such showy displays, such as Fremont pincushion, Chaenactis fremontii (since fields of white don't show up well against the whitish background of the desert soil).

Summary of Annual Germination, Growth and Blooms in 2010-2011

The widespread rainfall of 1-2 inches in the desert in mid-October 2010 woke up many perennials and shrubs, and began the annual germination.

Interestingly, the October rain germinated both a small number of summer annuals such as fivewing spiderling, Boerhavia intermedia; and chinch-weed, Pectis papposa; and some winter annuals such as hairy sand verbena, Abronia villosa, all of which are blooming together now in some places in an unusual juxtaposition.

The widespread rainfall of 1-2.5 inches in late December 2010 encouraged further growth of the annuals, and germinated more species.

However, despite the widespread rainfall, annual germination did not occur in many areas, and in other areas, the Brassica tournefortii germinated first and has now crowded out the other annuals. Some areas will have essentially no annual display at all, just scattered annuals at most.

Fortunately, many areas are in good bloom, although no carpets of flowers are present yet. As of 19 January 2011, on each single day trip in good areas, we are consistently finding over 1,000 individuals in bloom of at least 40 species. Every trip reveals new species that have just come into bloom, and shows buds on other species that haven't yet bloomed.

The plots below show a consistent upward trend in both the total number of all species, and the total number of annual species, seen in bloom so far. Those plots show that we are now about halfway toward the numbers seen at the time of peak bloom.

In particular, as of 19 January 2011, we have seen 124 different species in bloom this season, out of a typical total of ~200-250 species seen by the end of the desert season.

The plots show that the bloom state this year is about one month earlier than last year.

Map showing the best and worst bloom locations

The following map contains observations made between 1/22/11 and 1/31/11. The blue color represents areas that have a good bloom now, or will soon have a good bloom. The red color represents areas that do not have a good bloom now, nor are they expected to have one in the future. Some of these may have a decent bloom later; some will not, either because the Asian mustard has taken over the area, or annuals simply didn't germinate in large numbers there this year.

The blue areas on this map do not necessarily show locations of carpets of flowers, or blooms that take your breath away. It only shows where there are a number of species in bloom or not. Most of the species in bloom might be non-showy species that only a botanist would love seeing.

Figure 0. Map showing the best (blue) and worst (red) bloom locations

Map showing the best and worst bloom locations

Bloom update for various locations

From RT Hawke:

Henderson Canyon Road (by Coyote Mountain), 1/31/11 - a two hundred square foot area of wind blown sand has Abronia and Dithyrea in full bloom with all the other usual suspects in flower, but mostly a week or so behind.

Henderson Road, 1/31/11 - looks like the mustard has won over the fields of flowers

Di Giorgio road at the end of the pavement, 1/31/11 - not much

Henderson Canyon Road off pavement, 1/31/11 - not much

Henderson Canyon at the end of the access dirt road, 1/31/11 - Is starting to peak, Mimulus has been in bloom for a couple of weeks and there is lots of it. 42 species of plants in bloom, mostly annuals. Maybe the first Thysanocarpus, Chia and Antirrhinum in bloom for the season.

Borrego Palm Canyon, 1/31/11 - 53 species in bloom, although a number just had one flower. Crossosoma in full bloom. Maybe first Phacelia minor, Baccharis and Pleurocoronis in bloom for the season

Little Surprise Canyon, 1/31/11 - 25 species in bloom. Looks like 1 to 2 weeks away.

Glorietta Canyon loop, 1/22/11 - 29 species in bloom mostly single flowers. Crossosoma was still in bud. Lyrepod was in full bloom and about 20 Eriophyllum were in bloom. It looked like it was three weeks away.

Plum Canyon (right fork), 1/31/11 - not much. Deerweed in full bloom.

Lizard Canyon, 1/31/11- even less than not much

Buttes Pass Area, 1/31/11 - the place to be this year

Pinyon Road to Harper flats, 1/31/11 - not much, which is very surprising since the best bloom is in that surrounding area.

Elephant Trees Natural Area just south of Ocotillo Wells, 1/22/11 - Almost nothing and will probably be that way.

Detailed Germination, Growth and Bloom Reports From Each Hike

These reports are just summaries of these conditions from each hike.

See also Detailed Germination, Growth and Bloom Reports From Each Hike in 2009-2010.

12/17/10: Villager Peak Trail. Overall on this trip, we saw over 198 plants of 63 species in flower.

12/23/10: Fossil Canyon and Wash, Coyote Mountains. Overall on this trip, we saw over 444 plants of 40 species in flower.

12/27/10: The Domelands, Coyote Mountains. Overall on this trip, we saw over 380 plants of 39 species in flower.

1/6/11: West Butte Borrego Mountain, Borrego Mountain Wash, The Slot. Overall on this trip, we saw over 695 plants of 53 species in flower.

1/11/11: Hawk Canyon, North side Borrego Mountain. Overall on this trip, we saw over 1,089 plants of 53 species in flower.

1/15/11: Coyote Mountain, South Approach. Brittlebush, Encelia farinosa, has now lit up the PegLeg Monument area at the intersection of Henderson Canyon Road and S22, as well as the slopes of Coyote Mountain above it. Emory's rock-daisy, Perityle emoryi, is beginning its display there on the slopes as well. See Picture of both (you have to look hard below the Encelia to see the little dots of white from the first Perityle flowers).

Overall on this trip, we saw over 1,060 plants of 41 species in flower.

1/19/11: Harper Canyon. Carpets of Bigelow's monkeyflower, Mimulus bigelovii, greeted us in places as we hiked the Harper Canyon Jeep Road. One of the biggest surprises was to see tiny plants in flower of glandular nemacladus, Nemacladus glanduliferus, in bloom on the way back, at dusk, that we had walked right past on the way up in harsher mid-day light. We found 12 species in bloom not seen previously this season.

Overall on this trip, we saw over 1,385 plants of 49 species in bloom.

1/23/11: Harper Canyon. We repeated the trip of 1/19/11, starting a bit farther up on the Jeep Road, and made it farther up canyon to Harper Flat. Overall on this trip, we saw over 1,656 plants of 58 species in bloom, even though we missed seeing 10 species in bloom seen on the 1/19/11 trip. (We drove past them this time without seeing them, so they couldn't be counted.)

1/27/11: Mine Wash, Mine Canyon. Mine Wash Road is just glorious with chuparosa in bloom along the lower part of the road near SR78. Parry's marina, Marina parryi, is in full bloom along the last half of the road, but you have to get out of your car and look at it up close to appreciate its beautiful dark blue blooms.

Overall on this trip we found over 1,781 plants of 74 species in bloom.

1/31/11: San Sebastian Marsh. This area has almost no annual germination at all of native plants, with only some drainages having some germination. Vast areas that had Cryptantha species in previous years have no seedlings at all, and even areas that had dead stalks of Brassica tournefortii have no germination. Unfortunately, there are still large numbers of Brassica tournefortii plants that did manage to germinate and bloom, albeit as mostly small plants.

But we did find one drainage that had at least 50 plants of Salton milk-vetch, Astragalus crotalariae, in beautiful bloom.

Overall in this trip, thanks in large part to blooms observed along the drive to this area along SR78, we saw over 598 plants of 33 species in bloom. Even though we botanized a poor area this time, these numbers are comparable to what we saw in good areas last year at this time.

Pictures From Each Hike

See Photo Gallery of Desert Species Observed in Bloom for photographs organized by flower color. The date and location of each picture are given in that table.

Most of the rest of my pictures were taken for scientific purposes, and not specifically to show anything about the bloom. However, they may be of interest to people showing some aspects of what the bloom was like on a given date. My pictures are not even on standard webpages; Table 2 gives links to a directory and you have to click on the link for each picture to see it. Scientific names are used almost exclusively for the picture names.

The context for most of these pictures is sometimes given in the botanical reports from each hike.

Table 2. Links to Directories With Pictures From Each Trip

November 24
November 27
December 3
December 13
December 17
December 23
December 27
January 6
January 11
January 15
January 19
January 23
January 27
January 31

See also Pictures From Each Hike in 2009-2010 (caution: some pictures may have been deleted due to web space limitations).

How Long Will An Annual Bloom Last

General Factors

Past Rainfall, Future Rainfall, and Heat are the main factors determining how long an annual bloom will last on the desert floor at about 1000 feet elevation:

Predictions for This Year

Although I thought that this was going to be a good bloom year everywhere in the desert due to the two widespread heavy rain events, that turns out not to be true. Location matters a lot this year. Some areas will have essentially no annual display at all, just scattered annuals at most.

The many good areas will keep going until an extended heat wave suddenly ends the annual bloom.

If the trends seen in the plots below continue, we'll begin full bloom in early February, and probably get in at least a month of full bloom, and maybe more, before it gets too hot, frying the annuals. Many have been the March's where the bloom was suddenly ended by a spell of hot weather.

Species in Bloom On Each Trip

Number of Species and Plants in Bloom On Each Trip

Five plots are given below; each plot has this year's bloom data as well as last year's bloom data for comparison:

The plots and the table here must be interpreted cautiously, for at least three reasons:

Figure 1. Number of Species in Bloom on Each Trip

Graph showing the number of species found in bloom on each trip for 2008-2009 and 2009-2010

Figure 2. Number of Plants in Bloom on Each Trip

Graph showing the number of individual plants found in bloom on each trip for 2008-2009 and 2009-2010

Figure 3. Cumulative Number of Species Seen in Bloom From All Trips

Graph showing the cumulative number of species found in bloom for trips in 2008-2009 and 2009-2010

Figure 4. Cumulative Number of Annual Species Seen in Bloom From All Trips

Graph showing the cumulative number of annual species found in bloom for trips in 2008-2009 and 2009-2010

Figure 5. Percent of All Species Seen in Bloom From All Trips That Are Annuals

Graph showing the percent of all species cumulatively seen in bloom that are annuals for 2008-2009 and 2009-2010

Table 3 gives the numbers used for the above plots, for the last two months. The individual observations used to obtain these numbers are in the List of Species in Bloom On Each Trip.

Table 3. Number of Species and Total Number of Plants in Bloom on Each Trip

Number of11/1111/2411/2712/312/1312/1712/2312/271/61/111/151/19

List of Species in Bloom On Each Trip, With Photographs

Table 4 gives the number of plants observed to be in bloom for each species on each hike, with a maximum value of 99 plants for each species. This maximum value prevents one species from dominating the total plants in bloom, and makes it much easier on me to keep track of the bloom.

Because the hike locations vary, some species will not be present on every hike, so the lack of an entry for a given hike says nothing about whether that species is blooming elsewhere.

The Checklist is sorted first by category, with dicots before monocots, and then by family and scientific name. The Family and Scientific Name are from the Jepson Manual. An asterisk before the Common Name indicates a non-native taxon.

See Plant Family Abbreviations to obtain the full family name from the abbreviations used in the table below.

The Checklist has thumbnail photographs for most of the species, all of which were taken in the Borrego Desert. Clicking on the thumbnail photograph gives a larger version equal in size to the ones at the top of this page.

All the larger versions are also presented in Pictorial Gallery of Species in Bloom To Date in 2009-2010, organized by flower color.

All pictures were taken by myself, with a Sony Point and Shoot T9 camera except the following:

This table gives the number of plants in bloom only in the last two months.

Some species that have bloomed in the Borrego Desert are not listed here, since I never observed them in bloom. Such species are found only in a few locations, and I either never visited those locations or they bloomed in between my visits to their location.

Of course, species that bloom later in the year, and species that do not have flowers (ferns, etc.) are not present in this list, so it is not the equivalent of a plant checklist for the Borrego Desert.

Table 4. List of Species in Bloom On Each Trip

#FAMScientific NamePixCommon Name11/1111/2411/2712/312/1312/1712/2312/271/61/111/151/19
1ACAJusticia californicaPhotograph of flower of Justicia californicachuparosa  50  50101020102020
2AMAAmaranthus albusPhotograph of flower of Amaranthus albus*tumble pigweed     1      
3AMAAmaranthus palmeriPhotograph of flower of Amaranthus palmeriPalmer's amaranth     1      
4ASCAsclepias subulataPhotograph of flower of Asclepias subulatarush milkweed     5 51   
5ASCMatelea parvifoliaPhotograph of flower of Matelea parvifoliaspearleaf   1        
6ASCSarcostemma hirtellumPhotograph of flower of Sarcostemma hirtellumrambling milkweed        105  
7ASTAdenophyllum porophylloidesPhotograph of flower of Adenophyllum porophylloidesSan Felipe dogweed    1       
8ASTAmbrosia dumosaPhotograph of flower of Ambrosia dumosaburroweed 1    2112  
9ASTBebbia juncea var. asperaPhotograph of flower of Bebbia juncea var. asperasweetbush 11152550404030350
10ASTChaenactis stevioidesPhotograph of flower of Chaenactis stevioidesdesert pincushion        1015  
11ASTChrysothamnus paniculatusPhotograph of flower of Chrysothamnus paniculatuspunctate rabbitbrush50  10    32 3
12ASTDicoria canescensPhotograph of flower of Dicoria canescensdesert dicoria 10          
13ASTEncelia farinosaPhotograph of flower of Encelia farinosabrittlebush     510105109920
14ASTEncelia frutescensPhotograph of flower of Encelia frutescensbutton encelia51   510 320  
15ASTEricameria brachylepisPhotograph of flower of Ericameria brachylepisboundary goldenbush   9930       
16ASTGeraea canescensPhotograph of flower of Geraea canescenshairy desert-sunflower         2  
17ASTGutierrezia sarothraePhotograph of flower of Gutierrezia sarothraematchweed   30251  45  
18ASTHymenoclea salsola var. salsolaPhotograph of flower of Hymenoclea salsola var. salsolacheesebush  2   5 2   
19ASTIsocoma acradenia var. acradeniaPhotograph of flower of Isocoma acradenia var. acradeniaalkali goldenbush99       2   
20ASTMalacothrix glabrataPhotograph of flower of Malacothrix glabratadesert dandelion     1  5205 
21ASTMonoptilon bellioidesPhotograph of flower of Monoptilon bellioidesdesert star         30  
22ASTPalafoxia arida var. aridaPhotograph of flower of Palafoxia arida var. aridadesert needle55    401202011
23ASTPectis papposa var. papposaPhotograph of flower of Pectis papposa var. papposachinch-weed 9950      41 
24ASTPerityle emoryiPhotograph of flower of Perityle emoryiEmory's rock-daisy        120995
25ASTPleurocoronis plurisetaPhotograph of flower of Pleurocoronis plurisetaarrow-leaf      1 1  10
26ASTPsathyrotes ramosissimaPhotograph of flower of Psathyrotes ramosissimaturtleback      5     
27ASTRafinesquia neomexicanaPhotograph of flower of Rafinesquia neomexicanadesert chicory      1     
28ASTSenecio mohavensisPhotograph of flower of Senecio mohavensisMojave ragwort           6
29ASTStephanomeria pauciflora var. paucifloraPhotograph of flower of Stephanomeria pauciflora var. pauciflorawire-lettuce55210 122   1
30ASTTrichoptilium incisumPhotograph of flower of Trichoptilium incisumyellow-head     11 3036 
31ASTTrixis californica var. californicaPhotograph of flower of Trixis californica var. californicaCalifornia trixis     1     3
32ASTViguiera parishiiPhotograph of flower of Viguiera parishiiParish's viguiera 53 202030304302030
33ASTXylorhiza orcuttiiPhotograph of flower of Xylorhiza orcuttiiOrcutt's woody-aster        1   
34BIGChilopsis linearis ssp. arcuataPhotograph of flower of Chilopsis linearis ssp. arcuatadesert-willow10           
35BORAmsinckia menziesii var. intermediaPhotograph of flower of Amsinckia menziesii var. intermediacommon fiddleneck          20 
36BORCryptantha angustifoliaPhotograph of flower of Cryptantha angustifolianarrow-leaved cryptantha     1030 50999920
37BORCryptantha barbigeraPhotograph of flower of Cryptantha barbigerabearded cryptantha          31
38BORCryptantha maritimaPhotograph of flower of Cryptantha maritimaGuadalupe cryptantha       110999999
39BORCryptantha racemosaPhotograph of flower of Cryptantha racemosabushy cryptantha       2    
40BORPectocarya recurvataPhotograph of flower of Pectocarya recurvatacurvenut combseed          99 
41BORTiquilia palmeriPhotograph of flower of Tiquilia palmeriPalmer's coldenia      1     
42BRABrassica tournefortiiPhotograph of flower of Brassica tournefortii*Asian mustard     21 20999999
43BRADithyrea californicaPhotograph of flower of Dithyrea californicaspectacle-pod        3  1
44BRALepidium lasiocarpum var. lasiocarpumPhotograph of flower of Lepidium lasiocarpum var. lasiocarpumhairy-podded pepper-grass        5 1 
45BRALyrocarpa coulteri var. palmeriPhotograph of flower of Lyrocarpa coulteri var. palmeriCoulter's lyrepod   1       30
46BRASisymbrium irioPhotograph of flower of Sisymbrium irio*London rocket         31 
47CACFerocactus cylindraceusPhotograph of flower of Ferocactus cylindraceusCalifornia barrel cactus  1         
48CACMammillaria dioicaPhotograph of flower of Mammillaria dioicaCalifornia fish-hook cactus           1
49CAMNemacladus glanduliferus var. glanduliferusPhotograph of flower of Nemacladus glanduliferus var. glanduliferusglandular nemacladus           5
50CAPIsomeris arboreaPhotograph of flower of Isomeris arboreabladderpod        2030  
51CARAchyronychia cooperiPhotograph of flower of Achyronychia cooperifrost mat     110 3 1 
52CHEAtriplex hymenelytraPhotograph of flower of Atriplex hymenelytradesert holly       30510  
53CHEChenopodium muralePhotograph of flower of Chenopodium murale*nettle-leaved goosefoot        11  
54CUSCuscuta californica var. papillosaPhotograph of flower of Cuscuta californica var. papillosapapillate dodder        1   
55EUPChamaesyce micromeraPhotograph of flower of Chamaesyce micromeraSonoran spurge 1         15
56EUPChamaesyce pediculiferaPhotograph of flower of Chamaesyce pediculiferaCarrizo Mountain spurge      10     
57EUPChamaesyce polycarpaPhotograph of flower of Chamaesyce polycarpasmall-seeded spurge 599   2050 505099
58EUPChamaesyce setilobaPhotograph of flower of Chamaesyce setilobaYuma spurge          205
59EUPCroton californicusPhotograph of flower of Croton californicusCalifornia croton 5     51020  
60EUPDitaxis lanceolataPhotograph of flower of Ditaxis lanceolatanarrowleaf ditaxis 250520 1  2599
61EUPEuphorbia erianthaPhotograph of flower of Euphorbia erianthabeetle spurge           1
62EUPStillingia linearifoliaPhotograph of flower of Stillingia linearifolialinear-leaved stillingia      1    1
63EUPStillingia spinulosaPhotograph of flower of Stillingia spinulosaannual stillingia      2     
64FABAstragalus crotalariaePhotograph of flower of Astragalus crotalariaeSalton milk-vetch1        1  
65FABCaesalpinia virgataPhotograph of flower of Caesalpinia virgatawand holdback      50     
66FABDalea mollisPhotograph of flower of Dalea mollissilky dalea          10 
67FABDalea mollissimaPhotograph of flower of Dalea mollissimadowny dalea      121 3 
68FABHoffmannseggia glaucaPhotograph of flower of Hoffmannseggia glaucahog potato   2        
69FABLotus scoparius var. brevialatusPhotograph of flower of Lotus scoparius var. brevialatusshort-winged deerweed    30   1010 10
70FABMarina parryiPhotograph of flower of Marina parryiParry's marina           1
71FABPsorothamnus emoryiPhotograph of flower of Psorothamnus emoryiEmory's indigo-bush 5    103 2  
72FABPsorothamnus polydeniusPhotograph of flower of Psorothamnus polydeniusNevada indigo-bush       3    
73FABPsorothamnus schottiiPhotograph of flower of Psorothamnus schottiiindigo bush 1    11111  
74FOUFouquieria splendens ssp. splendensPhotograph of flower of Fouquieria splendens ssp. splendensocotillo 5   20308099992099
75GERErodium cicutariumPhotograph of flower of Erodium cicutarium*redstem filaree    1  30  130
76HYDEucrypta micranthaPhotograph of flower of Eucrypta micranthadesert eucrypta        31  
77HYDPhacelia distansPhotograph of flower of Phacelia distanscommon phacelia        1  20
78KRAKrameria erectaPhotograph of flower of Krameria erectaPima rhatany         11 
79KRAKrameria grayiPhotograph of flower of Krameria grayiwhite rhatany  1     3153 
80LAMHyptis emoryiPhotograph of flower of Hyptis emoryidesert-lavender 25  155155151099
81LOAMentzelia involucrataPhotograph of flower of Mentzelia involucratabracted blazing star          1 
82LOAPetalonyx thurberi ssp. thurberiPhotograph of flower of Petalonyx thurberi ssp. thurberiThurber's sandpaper-plant      1     
83MALHibiscus denudatusPhotograph of flower of Hibiscus denudatusrock hibiscus 510  10      
84MALSphaeralcea ambigua var. ambiguaPhotograph of flower of Sphaeralcea ambigua var. ambiguaapricot mallow      1     
85NYCAbronia villosa var. villosaPhotograph of flower of Abronia villosa var. villosahairy sand-verbena 50    50 201010 
86NYCAllionia incarnataPhotograph of flower of Allionia incarnatatrailing four o'clock 350 3 1 1399 
87NYCBoerhavia coccineaPhotograph of flower of Boerhavia coccineascarlet spiderling           2
88NYCBoerhavia intermediaPhotograph of flower of Boerhavia intermediafivewing spiderling  5         
89NYCBoerhavia wrightiiPhotograph of flower of Boerhavia wrightiiWright's spiderling        510  
90NYCMirabilis bigelovii var. retrorsaPhotograph of flower of Mirabilis bigelovii var. retrorsawishbone plant  201030 2235310
91ONACamissonia boothii ssp. condensataPhotograph of flower of Camissonia boothii ssp. condensataBooth's desert primrose         251 
92ONACamissonia californicaPhotograph of flower of Camissonia californicaCalifornia suncup     1    1 
93ONACamissonia cardiophylla ssp. cardiophyllaPhotograph of flower of Camissonia cardiophylla ssp. cardiophyllaheartleaf sun-cup        2   
94ONACamissonia claviformis ssp. peirsoniiPhotograph of flower of Camissonia claviformis ssp. peirsoniibrown-eyed primrose      5 409916
95ONACamissonia pallida ssp. pallidaPhotograph of flower of Camissonia pallida ssp. pallidapale sun-cup     1      
96ONACamissonia refractaPhotograph of flower of Camissonia refractanarrow-leaf sun-cup           20
97PAPEschscholzia minutiflora ssp. minutifloraPhotograph of flower of Eschscholzia minutiflora ssp. minutiflorasmall-flowered poppy        15299
98PAPEschscholzia parishiiPhotograph of flower of Eschscholzia parishiiParish's poppy      2    30
99PLAPlantago ovataPhotograph of flower of Plantago ovatadesert plantain       1111 
100POLEriogonum deflexum var. deflexumPhotograph of flower of Eriogonum deflexum var. deflexumflat-topped buckwheat15     5     
101POLEriogonum fasciculatum var. polifoliumPhotograph of flower of Eriogonum fasciculatum var. polifoliumCalifornia buckwheat   1        
102POLEriogonum inflatumPhotograph of flower of Eriogonum inflatumdesert trumpet5210302055205052050
103POLEriogonum molestumPhotograph of flower of Eriogonum molestumpineland buckwheat    10       
104POLEriogonum thomasiiPhotograph of flower of Eriogonum thomasiiThomas' buckwheat        23 5
105POLEriogonum wrightii var. nodosumPhotograph of flower of Eriogonum wrightii var. nodosumWright's buckwheat   992       
106RESOligomeris linifoliaPhotograph of flower of Oligomeris linifolianarrowleaf oligomeris       1    
107RUTThamnosma montanaPhotograph of flower of Thamnosma montanaturpentine broom   5       3
108SCRMimulus bigelovii var. bigeloviiPhotograph of flower of Mimulus bigelovii var. bigeloviiBigelow's monkeyflower           99
109SCRMohavea confertifloraPhotograph of flower of Mohavea confertifloraghost flower           2
110SOLLycium andersoniiPhotograph of flower of Lycium andersoniiAnderson's desert-thorn   1       1
111SOLLycium fremontiiPhotograph of flower of Lycium fremontiiFremont box-thorn       3    
112SOLNicotiana obtusifoliaPhotograph of flower of Nicotiana obtusifoliadesert tobacco    2  155  
113SOLPhysalis crassifoliaPhotograph of flower of Physalis crassifoliathick-leaved ground cherry    2 1 220  
114URTParietaria hespera var. hesperaPhotograph of flower of Parietaria hespera var. hesperapellitory           1
115VISPhoradendron californicumPhotograph of flower of Phoradendron californicumdesert mistletoe           2
116ZYGFagonia laevisPhotograph of flower of Fagonia laevisCalifornia fagonia  101      3 
117ZYGLarrea tridentataPhotograph of flower of Larrea tridentatacreosote bush  2  30302020202099
118ZYGTribulus terrestrisPhotograph of flower of Tribulus terrestris*puncture-vine 1   5      
119LILAgave desertiPhotograph of flower of Agave desertidesert agave       1 2 2
120POAAristida adscensionisPhotograph of flower of Aristida adscensionissix-weeks three-awn      11099209920
121POABouteloua aristidoides var. aristidoidesPhotograph of flower of Bouteloua aristidoides var. aristidoidesneedle grama         50  
122POABouteloua barbata var. barbataPhotograph of flower of Bouteloua barbata var. barbatasix-weeks grama 1          
123POAPleuraphis rigidaPhotograph of flower of Pleuraphis rigidabig galleta 1011 1  2020  
124POASchismus barbatusPhotograph of flower of Schismus barbatus*Mediterranean schismus           50

Links to Other Webpages, etc. on Anza-Borrego Desert State Park Blooms

Anza-Borrego Desert Wildflowers: Where and When to Look and latest report (usually from Bill Sullivan) from the Anza-Borrego Desert Natural History Association.

Anza-Borrego Desert State Park official site, with wildflower information on it. Click on the link near the bottom for the Flower Update and Map, which might be updated weekly.

DesertUSA Anza-Borrego Desert State Park Wildflower Reports For 2010

Carol Leigh's California Wildflower Hotsheet

Anza-Borrego Foundation and Institute Wildflowers and their Anza-Borrego Desert State Park Wildflower Hotline: (760)767-4684. "Information on this recording is updated regularly."

Theodore Payne Wildflower Hotline (Reports begin on 5 March 2010)

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Copyright © 2008-2011 by Tom Chester.
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Updated 2 February 2011.