Flora of Idyllwild Park, San Jacinto Mountains

Fig. 1. Lilly Creek in Idyllwild Park, looking downstream just below beginning of steep portion (see text below). This location is just southwest of the Nature Center. Click on the picture for a larger version.

Fieldwork Dates
Floral Regions
Species Checklist
Notes on Some Species

Fig. 2. The flora of Idyllwild Park contains flowers large and small. Note the fingers for scale in the upper pictures, and the pine needles, branches and one incense-cedar twig for scale in the linked version of the lower picture. Click on the pictures for larger versions.
  • Upper left: the almost-unnoticeable teeny-tiny 3 mm (0.1 inch) flower of threadplant, Nemacladus longiflorus var. breviflorus.
  • Upper right: the large showy flower of lemon lily, Lilium parryi, ~12 cm (5 inches) across, the probable namesake of Lilly Creek. (Picture from Tahquitz Valley since we do not yet have a picture of a lemon lily flower from Idyllwild Park.)
  • Lower: a field of flowers of volcanic gilia, Gilia ochroleuca ssp. exilis, and Palomar monkeyflower, Mimulus diffusus (called M. palmeri in the Jepson Manual), covering an area.
See Michael Charters' Field Trips Photo Gallery: Idyllwild County Park, San Jacinto Mountains, June 2010 for other pictures of flowers from Idyllwild Park.


Idyllwild Park, a Riverside County Park, is located on the west side of Idyllwild. See an interactive Google map for driving directions and an overview of its location, and a Park map giving its location and access roads in Idyllwild. The latter map shows some of the hiking trails and the locations of the Nature Center, Campground and other features. The trails are best shown in this Detailed Trail Map with mileages.

The Park contains a Nature Center on the north side, and a campground on the south side. Day use fees of $3 per adult, $2 per child and $1 per dog are charged.

The Park is roughly one mile long in the north-south direction at its maximum extent, and one half mile long in the east-west direction at its maximum extent. Its shape is roughly rectangular, with a rectangular piece missing on its northwest corner and a triangular piece missing on its southeast corner, with a total area of 202 acres.

Lilly Creek is the main feature of the western part of the Park, essentially forming the western boundary in the north Park and cutting a steep and deep gorge through the south Park as erosion has proceeded upstream from Strawberry Creek. There is over 560 feet of relief from the bottom of Lilly Creek to the top of the knolls above its banks (5200 feet elevation to over 5760 feet).

The USGS Topo Map uses the name Lilly Creek, although it is given as Lily Creek in other sources. The origin of the name is unknown. But since lemon lilies grow in the creek, it is probable that is the origin of the name. Historic references often spell lily as lillies, so the difference in the spelling is not significant.

Idyllwild Creek is the main topographic feature of the eastern and southeastern sides of the park, although most of the northern part of the creek is on private property to the east. The name Idyllwild Creek appears on a local Idyllwild map, but not on the USGS Topographic Map. Idyllwild Creek has a steep western bank extending to Idyllwild Park, and a gentle eastern bank that is essentially a relatively minor feature in Strawberry Creek Valley. Because of the latter, Idyllwild Creek is flatter in elevation profile along its course than Lilly Creek. Idyllwild Creek forms the southeastern boundary of the park and joins Lilly Creek near the southern end of the Park.

The topography of the Park is shown in the Google Earth image in Fig. 3:

Fig. 3. Google Earth View of Idyllwild Park (approximately the shaded green area) looking northwest. The gorge of Lilly Creek is visible in the center, with the campground road contouring up Lilly Creek to cross the Creek. Lilly Creek has created the steep slopes in the southern half of the park. In contrast, the northern half of the park is much flatter. The steep western bank of Idyllwild Creek is mostly to the east of the Park. It is probably not a coincidence that the meadow visible just above the confluence of Lilly and Idyllwild creeks is located there, due to the presumed-higher water table in that area. Click on the picture for a larger unlabeled version.

The elevation profile of Lilly Creek in Idyllwild Park confirms what is seen in Fig. 3. The erosional nick point, shown by the yellow circle in the middle of the profile, occurs just southwest of the Nature Center, at the location shown in Fig. 1. Above that, the creek elevation profile has a constant slope of about 450 feet per mile. Below that the creek has an elevation profile of about 1200 feet per mile until it levels out in the flattish Strawberry Creek area.

Idyllwild Park has a rich vascular-plant flora due to its many different habitats resulting from its topography, and the fairly well-watered Lilly Creek, at least before it was dammed at Foster Lake with upstream diversions for the Idyllwild Water District.

Fieldwork Dates

Our main plant surveys occurred on all-day trips on 15, 21 and 25 June 2010, and 20 November 2012, by the following people:

Table 1. Major floral surveys of Idyllwild Park

DateSurveyed Area of ParkParticipants
15 June 2010Northwest, mostly on trailTom Chester, Dave Stith and Kay Madore
21 June 2010Northwest, mostly in Lilly CreekTom Chester, Dave Stith and Michael Charters
25 June 2010Southwest, mostly on trail, and NortheastTom Chester, Dave Stith and Michael Charters
20 November 2012Southeast and NortheastTom Chester and Dave Stith

On each survey, every species encountered was recorded, with its first location recorded by GPS. Abundances were estimated for each species at the end of each survey, by estimating the minimum number of plants we saw along our entire survey up to a maximum of 99 plants.

In addition, Dave Stith did shorter surveys on 1 and 5 September 2010; 19 and 20 April 2011; 13 June 2011; 8 July 2011, and 31 December 2011, usually with one or two species as targets.

Floral Regions

Our surveys showed dramatic differences in the flora between different areas of the park, so we decided to present the flora separately for three different areas of the park. Our division is shown in Fig. 4, which also shows the hiking trails of the Park. As is almost always the case, boundaries between areas are sometimes somewhat arbitrary.

Fig. 4. Map showing Idyllwild Park, its hiking trails, and division into three floral areas (larger version). Base map from Riverside County Parks

The Southwest area has the clearest delineation, being the only part of Idyllwild Park significantly west of Lilly Creek, with a large area of chaparral plants not present in the rest of the Park. Its boundary with the southeast section is taken to be between the Hillside Trail and the Campground Road.

The Southeast area has extensive flattish moist areas not present in the rest of the Park; the only meadow in the Park; significant human disturbance from the 88 site campground; and borders an extensively-developed residential area. Its northern boundary is taken to be approximately along the top of the steep area to the north. This roughly corresponds to the northern boundary of the southwest section. Trails from the Nature Center that lead to the campground allow a fairly clear delineation on the north, except along the Perimeter Trail. Fortunately, the flora doesn't vary much in that section of the Perimeter Trail, so it makes little difference exactly where the boundary is placed.

The southeast portion has south-facing slopes similar to those of the southwest portion.

The North area is distinctive due to its terrain being above the erosional nick point, and hence not as steep as in the other two sections. Probably as a result of its gentler topography, it is covered by pine forest with no significant chaparral component. It contains the upper portion of Lilly Creek, which has a flatter elevation profile in the north.

The routes we have surveyed as of 24 November 2012, along with the GPS points where the first occurrence of species were recorded, are shown in this map (The GPS points shown on the north side of State Route 243 were not used for the Park Flora.) Although our surveys were not done with these divisions into flora areas in mind, our surveys were perhaps not-coincidentally usually confined to one area.

A few surveys crossed boundaries of the floral areas. For those, it was straightforward to use the GPS locations to assign the first location of species to floral areas. However, plant abundance estimates from those surveys could not be ex post facto separated into the floral areas.

Another effect from surveys that crossed boundaries is a possible loss of completeness in the checklist for the second floral area traversed. This occurs when species are present in both floral areas, since those species would be recorded only from their first location, which would be in the first floral area traversed. Fortunately, we have enough surveys beginning in each area that this loss of completeness is probably not high.

Now that we have the floral areas defined, future surveys can produce better abundance estimates and species lists for each area.

Species Checklist

The following is the latest plant checklist for the park from all surveys to 20 November 2012.

We would have included vouchers from Idyllwild Park, but there are no vouchers online that we can be certain have come from the Park itself. There are no online vouchers as of 29 November 2012 whose locality is Idyllwild Park. There are many vouchers with a locality of Idyllwild; we have collected those separately in a Voucher Flora of the Idyllwild Area. However, some of those vouchers are not in fact even from Idyllwild itself, since vouchers often just list the nearest city within 20 miles or even more.

The Checklist follows the Jepson Manual Second Edition with only a few exceptions. It is sorted first by category and then by family and scientific name. The family name is abbreviated to the first five characters in order to save space in the table rows.

A few species have qualifiers given in front of the scientific name, indicating that the species determination is not 100%. Notes on many of those species are given in the next section.

An asterisk before the Common Name indicates a non-native taxon.

The three columns under the header #Plants give a minimum estimate of the number of plants we saw along our entire survey in each area (up to a maximum of 99 plants). The southwest area (SW) is presented first, since its flora is significantly different from the other two areas, being dominated by chaparral. The other two areas, the north half of the park (N) and the southeast part of the park (SE), have significant riparian areas and are dominated by the pine forest.

The scientific name is linked to the latest online Jepson Manual description for each species, which also gives the months in which each species flowers. That link also gives a map of where the species occurs in California; a plot of elevation vs. latitude for California; and a histogram of the voucher collections by month. Only a few species will not have working links, if their names have been updated more recently (such as Mimulus diffusus, which is still listed under M. palmeri in the online flora, or if they are reserved-judgment taxa which are listed in the entry for another taxon name.

The common name for each species in the checklist is linked to Calphotos to give pictures of most taxa. Note that the link will not always return pictures, since not every species has pictures at Calphotos, and a number of species still have their Calphotos pictures under the Jepson Manual First Edition Names.

See Field Trips Photo Gallery: Idyllwild County Park, San Jacinto Mountains, June 2010 by Michael Charters for photographs of many of these species from 6/21/10 and 6/25/10.

Since many of the second edition Jepson Manual names will be unfamiliar to many of us, we have created a version of the checklist with the 1993 First Edition Jepson Manual scientific names. In that version, the number of each species is exactly the same as the number below, so you can quickly find the older name by just looking up the name for the species with the same number. (i.e., that checklist is still sorted using the 2012 Second Edition Family and scientific names.)

Version for printing, without other text on this page: html (8 pages) or pdf Clickbook booklet (2 double-sided pages). (See printing instructions for an explanation of these options)

#FamilyScientific Name(*)Common Name# Plants
1DennsPteridium aquilinum var. pubescensbracken 9990
2EquisEquisetum arvensefield horsetail  10
3EquisEquisetum laevigatumsmooth scouring rush 99 
4PteriCheilanthes covilleibeady lipfern5  
5PteriPellaea mucronata var. mucronatabird's-foot fern10 2
6WoodsCystopteris fragilisbrittle bladder fern 1 
7CupreCalocedrus decurrensincense-cedar109980
8Cupre~Hesperocyparis stephensoniiStephenson cypress  10
9PinacAbies concolorwhite fir 1 
10PinacPinus coulteriCoulter pine153099
11PinacPinus jeffreyiJeffrey pine  1
12PinacPinus lambertianasugar pine104020
13PinacPinus ponderosaponderosa pine69999
14LauraUmbellularia californicaCalifornia bay1  
15AdoxaSambucus nigra ssp. caeruleablue elderberry  2
16AnacaRhus aromaticabasketbush30  
17ApiacTauschia parishiiParish's tauschia5011 
18ApocyAsclepias californicaCalifornia milkweed5  
19ApocyAsclepias eriocarpaIndian milkweed102535
20ApocyVinca major*greater periwinkle  99
21AsterAchillea millefoliumyarrow205020
22AsterAgoseris retrorsaspear-leaved mountain dandelion1029
23AsterAmbrosia acanthicarpabur-ragweed 20 
24AsterArtemisia douglasianamugwort 9999
25AsterArtemisia dracunculuswild tarragon 135
26Aster~Artemisia ludoviciana ssp. albulawhite mugwort  99
27AsterArtemisia ludoviciana ssp. incomptamountain mugwort52030
28AsterArtemisia tridentatabig sagebrush  7
29AsterCirsium occidentale var. californicumCalifornia thistle10 11
30Aster~Cirsium vulgare*bull thistle  25
31AsterCorethrogyne filaginifoliaCalifornia-aster22099
32AsterEricameria cuneata var. cuneatarock goldenbush1  
33AsterEricameria nauseosa var. bernardinaSan Bernardino rubber rabbitbrush18 
34AsterEricameria pinifoliapine goldenbush1  
35AsterErigeron foliosus var. foliosusleafy daisy5030 
36AsterEriophyllum confertiflorum var. confertiflorumgolden yarrow501025
37Aster~Gnaphalium palustrewestern marsh cudweed 99 
38AsterHemizonella minimadwarf madia 50 
39AsterHeterotheca sessiliflora ssp. echioidesbristly goldenaster  1
40AsterHulsea vestita ssp. callicarphabeautiful hulsea2052
41AsterLactuca serriola*prickly lettuce 3 
42AsterLessingia glandulifera var. glanduliferasticky lessingia  99
43AsterMadia gracilisslender madia 20 
44AsterMalacothrix clevelandiiannual malacothrix 1 
45AsterPentachaeta aureagolden daisy5010 
46AsterPseudognaphalium californicumCalifornia everlasting1 1
47AsterPseudognaphalium thermaleslender everlasting102099
48AsterRafinesquia californicaCalifornia chicory5  
49AsterSolidago velutina ssp. californicagoldenrod509999
50AsterSonchus asper ssp. asper*prickly sow thistle 1 
51AsterSonchus oleraceus*sow thistle  2
52AsterStephanomeria virgatatwiggy wreath plant1  
53AsterTanacetum parthenium*feverfew 9999
54AsterUropappus lindleyisilver puffs205 
55BetulAlnus rhombifoliawhite alder 206
56BoragCryptantha micrantha var. lepidamountain red-root cryptantha9999 
57BoragCryptantha muricata var. jonesiiprickly cryptantha9920 
58BoragCryptantha simulanspine cryptantha199 
59BoragPhacelia imbricata ssp. patulaimbricate phacelia  90
60BoragPhacelia minorwild canterbury bells10  
61Borag~Plagiobothrys canescens var. canescensgrey popcorn flower2099 
62BoragPlagiobothrys collinus var. ursinusnorthern popcorn flower  30
63BrassBoechera californicaCalifornia elegant rock-cress502550
64Brass~Descurainia adenophorawhite tansy-mustard  1
65BrassDraba vernaspring draba 9999
66BrassErysimum capitatum var. capitatumwestern wallflower 17 
67BrassHirschfeldia incana*shortpod mustard  30
68BrassLepidium virginicum ssp. menziesiiwild pepper-grass  99
69BrassRorippa curvisiliquacurvepod yellow-cress 2 
70BrassSisymbrium altissimum*tumble-mustard5 99
71CampaHeterocodon rariflorumfew-flowered heterocodon 2 
72CampaNemacladus longiflorus var. breviflorusthread plant 99 
73CampaNemacladus longiflorus var. longiflorusthread plant4099 
74CapriLonicera subspicata var. denudatasouthern honeysuckle997065
75CaryoCerastium fontanum ssp. vulgare*perennial mouse-ear chickweed 2 
76CaryoLychnis coronaria*rose campion 51
77CaryoSilene verecundawhite catch-fly199 
78CaryoStellaria media*common chickweed  10
79ConvoCalystegia occidentalis ssp. fulcratawestern morning-glory5  
80DatisDatisca glomerataDurango root 60 
81EricaArctostaphylos glandulosa ssp. adamsiiLaguna manzanita3  
82EricaArctostaphylos pringlei ssp. drupaceapink-bracted manzanita999999
83EricaArctostaphylos pungensMexican manzanita  10
84EricaChimaphila menziesiilittle prince's pine  25
85EricaRhododendron occidentalewestern azalea 6030
86EricaSarcodes sanguineasnow-plant26 
87EuphoEuphorbia luridawoodland spurge 1 
88FabacAcmispon americanus var. americanusSpanish clover 99 
89FabacAcmispon heermannii var. heermanniisilky lotus  10
90FabacAcmispon nevadensis var. nevadensisSierra Nevada lotus5090 
91FabacAcmispon strigosusstrigose lotus5080 
92FabacAstragalus douglasii var. parishiiParish' Jacumba milk-vetch109940
93FabacHosackia crassifolia var. crassifoliabroad-leaved lotus411 
94FabacLathyrus latifolius*perennial sweet pea  1
95FabacLathyrus vestitus var. vestituswild sweetpea10 20
96FabacLupinus bicolordwarf lupine  20
97FabacLupinus concinnusbajada lupine59920
98FabacLupinus excubitus var. austromontanusmountain grape-soda lupine302035
99FabacLupinus formosuswestern lupine10 5
100FabacLupinus latifolius var. parishiiParish's lupine 10 
101FabacTrifolium microcephalumsmall-head field clover 99 
102FabacTrifolium monanthum ssp. grantianummountain carpet clover 5 
103FabacTrifolium willdenoviitomcat clover 99 
104FagacQuercus chrysolepiscanyon live oak509999
105FagacQuercus kelloggiiCalifornia black oak107055
106FagacQuercus kelloggii X Quercus wislizeni var. frutescensoracle oak  4
107FagacQuercus wislizeni var. frutescensinterior live oak50 99
108GentiFrasera parryiParry's green-gentian 169
109GeranErodium cicutarium*redstem filaree  99
110GrossRibes nevadensemountain pink currant 8060
111HyperHypericum scouleriScouler's St. Johnswort 10 
112LamiaMentha spicata*spearmint  20
113LamiaMonardella breweri ssp. lanceolatamustang mint501010
114LamiaScutellaria siphocampyloidescurve-flowered skullcap50 10
115LamiaStachys rigida var. rigida, var. quercetorumrigid hedge-nettle 9999
116LamiaTrichostema austromontanum ssp. austromontanumsouthern bluecurls 99 
117LoasaMentzelia dispersascattered blazing star10  
118MalvaSidalcea sparsifoliacheckerbloom  20
119MontiCalyptridium monandrumsand cress30103
120MontiClaytonia parviflora ssp. parvifloranarrow-leaved miner's lettuce 2 
121MontiClaytonia parviflora ssp. viridisgreen miner's lettuce3099 
122MontiClaytonia perfoliata ssp. mexicanasouthern miner's lettuce 99 
123MontiClaytonia perfoliata ssp. perfoliataminer's lettuce 99 
124OnagrCamissonia strigulosastrigose sun-cup  2
125OnagrCamissoniopsis confusaSan Bernardino sun-cup303 
126OnagrClarkia rhomboideadiamond-petaled clarkia109999
127OnagrEpilobium brachycarpumautumn willowweed 5 
128OnagrEpilobium canum ssp. latifoliummountain California-fuchsia23045
129OnagrEpilobium ciliatum ssp. ciliatumwillowherb 9999
130OnagrEpilobium densiflorumspike primrose 10 
131OnagrEpilobium glaberrimum ssp. glaberrimumglaucus willowherb 15 
132OnagrGayophytum heterozygumzig-zag gayophytum50  
133Onagr~Gayophytum oligospermumpinegrove groundsmoke150 
134OnagrGayophytum sp.groundsmoke  30
135OnagrOenothera elata ssp. hirsutissimaHooker's evening-primrose  30
136OrobaCastilleja applegatei ssp. martiniiMartin's paintbrush10 20
137OrobaCastilleja minor ssp. spiralislesser paintbrush 99 
138OrobaCordylanthus rigidus ssp. setigerusbristly bird's beak99 99
139PhrymMimulus aurantiacus var. pubescenshairy bush monkeyflower20 23
140PhrymMimulus brevipeswide-throated yellow monkeyflower50 2
141PhrymMimulus cardinalisscarlet monkeyflower 70 
142PhrymMimulus diffususPalomar monkeyflower 99 
143PhrymMimulus floribundusfloriferous monkeyflower5099 
144PhrymMimulus fremontii var. fremontiiFremont's monkeyflower9950 
145PhrymMimulus guttatuscommon monkeyflower 99 
146PhrymMimulus pilosusfalse monkeyflower3099 
147PlantAntirrhinum coulterianumCoulter's snapdragon1 5
148PlantKeckiella ternata var. ternatawhorledleaf penstemon992010
149PlantPenstemon centranthifoliusscarlet bugler20 50
150PlantPenstemon labrosus or P. rostriflorusbeardtongue 110
151PlantVeronica americanaAmerican speedwell  99
152PlataPlatanus racemosawestern sycamore  1
153PolemAllophyllum glutinosumsticky false-gilia10  
154PolemEriastrum sapphirinumsapphire woolly-star  10
155PolemGilia diegensiscoastal gilia 12 
156PolemGilia ochroleuca ssp. exilisvolcanic gilia2099 
157PolemLeptosiphon ciliatuswhisker-brush109999
158PolemSaltugilia australissouthern gilia20  
159PolemSaltugilia splendens ssp. splendenssplendid gilia2099 
160PolygEriogonum apiculatumSan Jacinto buckwheat 99 
161PolygEriogonum davidsoniiDavidson's buckwheat1 99
162PolygEriogonum molestumpineland buckwheat199 
163Polyg~Eriogonum nudum var. pauciflorumnaked buckwheat  1
164PolygEriogonum wrightii var. membranaceumWright's buckwheat203040
165PolygPolygonum aviculare ssp. depressum*knotweed  1
166PolygRumex acetosella*common sheep sorrel  50
167PolygRumex californicuswillow-leaved dock 5040
168PolygRumex conglomeratus*whorled dock1  
169PolygRumex sp.*dock 21
170PolygSidotheca trilobatathree-lobed oxytheca50  
171RanunAquilegia formosawestern columbine 8080
172RanunClematis ligusticifoliavirgin's bower  1
173RanunThalictrum fendleri var. fendleriFendler's meadow-rue 6060
174RhamnCeanothus leucodermischaparral whitethorn1035
175RhamnCeanothus palmeriPalmer's ceanothus 1 
176RhamnFrangula californicaCalifornia coffeeberry 86
177RhamnRhamnus ilicifoliahollyleaf redberry1  
178RosacAdenostoma fasciculatumchamise99  
179RosacAmelanchier utahensisUtah service-berry 1 
180RosacCercocarpus betuloides var. betuloidesbirch-leaf mountain-mahogany5 6
181RosacDrymocallis glandulosasticky cinquefoil  40
182RosacDrymocallis glandulosa var. reflexasticky cinquefoil299 
183RosacDrymocallis lactea var. lacteaNevada cinquefoil 4 
184RosacFragaria vescawoodland strawberry 9999
185RosacHorkelia clevelandii var. clevelandiiCleveland's horkelia 205
186RosacPotentilla gracilis var. fastigiataslender cinquefoil  30
187RosacPrunus virginiana var. demissawestern choke-cherry 20 
188RosacRosa californicaCalifornia wild rose 9999
189RubiaGalium angustifolium ssp. angustifoliumnarrowleaf bedstraw17070
190RubiaGalium aparinecommon bedstraw 6030
191SalicPopulus fremontii ssp. fremontiiFremont cottonwood  10
192SalicSalix laevigatared willow 1 
193SalicSalix lasiandra var. lasiandrashining willow  11
194SalicSalix lasiolepisarroyo willow 1560
195ScropVerbascum thapsus*common mullein  12
196UrticUrtica dioica ssp. holosericeastinging nettle 9999
197ViolaViola purpurea ssp. quercetorumgoosefoot yellow violet20160
198ViscaArceuthobium campylopodumpine dwarf-mistletoe59999
199ViscaPhoradendron serotinum ssp. tomentosumoak mistletoe2050 
200AgavaHesperoyucca whippleichaparral yucca20 5
201CyperCarex fractafragile sheath sedge 99 
202CyperCarex multicaulisforest sedge10303
203CyperCarex praegracilisclustered field sedge  99
204CyperCarex sentaswamp sedge 70 
205Cyper~Carex subfuscabrown sedge 12 
206CyperScirpus microcarpuspanicled bulrush 9999
207IridaIris germanica*iris 1 
208JuncaJuncus bufonius var. occidentaliswestern toad rush 30 
209JuncaJuncus effusus ssp. austrocalifornicusPacific rush 7090
210JuncaJuncus mexicanusMexican rush20299
211JuncaJuncus oxymerispointed rush 99 
212LiliaCalochortus palmeri var. munziiMunz's mariposa lily50  
213LiliaLilium parryilemon lily 30 
214OrchiPiperia elongatadense-flowered rein orchid102025
215PoaceAgrostis pallensseashore bentgrass3 50
216Poace~Agrostis scabrarough bentgrass 5 
217PoaceBromus carinatus var. carinatusCalifornia brome1099 
218PoaceBromus diandrus*ripgut brome11222
219PoaceBromus halliiHall's brome20 60
220PoaceBromus madritensis ssp. rubens*red brome  1
221PoaceBromus tectorum*downy brome999999
222PoaceCynodon dactylon*Bermuda grass 1 
223PoaceDeschampsia elongataslender hairgrass 36
224PoaceElymus elymoidessquirreltail309990
225PoaceElymus glaucus ssp. glaucusblue wildrye2099 
226PoaceElymus hispidus*intermediate wheatgrass  1
227PoaceFestuca microstachyssmall fescue10  
228PoaceFestuca myuros*rattail fescue999999
229PoaceHordeum murinum*foxtail barley  30
230PoaceKoeleria macranthaJune grass99 99
231PoaceMelica imperfectacoast-range melic50 16
232PoaceMuhlenbergia rigensdeergrass992070
233PoacePhalaris canariensis*canarygrass 2 
234PoacePoa bulbosa ssp. vivipara*bulbous blue grass  30
235PoacePoa pratensis ssp. agassizensisKentucky blue grass 2020
236PoacePoa secunda ssp. secundaone-sided bluegrass5099 
237PoaceSecale cereale*rye51 
238PoaceStipa coronatagiant needlegrass30  
239PoaceStipa occidentalis ssp. pubescensElmer's needlegrass 30 
240PoaceStipa parishii var. parishiiParish's needlegrass5 1
241PoaceElymus trachycaulus ssp. trachycaulusslender wheatgrass  50
242ThemiBloomeria croceagoldenstar2060 
243ThemiDichelostemma capitatum ssp. capitatumblue dicks2055 

Notes on Some Species

Hesperocyparis stephensonii. There are about 10 mature trees that have been planted along the southernmost boundary of the park next to a residential area. Since these are planted trees, they could be Hesperocyparis arizonica, or some hybrid between those two species.

Mimulus diffusus. The Jepson Manual combined this species with the similar M. palmeri species found in the Transverse Ranges and north. M. diffusus is endemic to the Peninsular Ranges and was considered separate from M. palmeri in Munz 1974. Fraga (2012) demonstrated that there were actually five separate species lumped under the name M. palmeri, and restored M. diffusus as a separate species. Unfortunately, all the Mimulus in California have now been transfered to the genus Erythranthe, so the next floral treatment by the Jepson Manual will probably call this species Erythranthe diffusa.

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Copyright © 2010-2012 by Tom Chester, Dave Stith, Michael Charters and Kay Madore.
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Last update: 2 December 2012