Flora of the Lake Hemet area of Garner Valley, San Jacinto Mountains

Bruce Watts and Tom Chester

Fig. 1. Top: View of the Lake Hemet area from along the Spitler Peak Trail looking southwest.

Bottom: View across Lake Hemet from its northwest end, looking east / southeast. Ericameria nauseosa var. oreophila, threadleaf common rabbitbrush, is in the foreground. The Desert Divide is the main skyline ridge, with the more distant Santa Rosa Mountains seen at the right where the Desert Divide ends near SR74. Note the people along the shoreline for scale.

Photos by Bruce Watts. Click on the pictures for versions showing a larger area.

Fig. 2. Top Left: Anemopsis californica, yerba mansa. Top Right: Asclepias fascicularis, narrow-leaf milkweed.
Bottom Left: Symphyotrichum subulatum var. parviflorum, annual water-aster. Bottom right: Huge mats of Acmispon heermannii var. heermannii, silky lotus, cover the exposed shoreline in 2018. They were submerged by water in 2019 and disappeared.
Photos by Bruce Watts. Click on the pictures for larger versions.

Shoreline, Aquatic, and Marsh Species Unique to Lake Hemet at San Jacinto Mountain
Procedure for Compiling the Checklist
Species Checklist
Notes on Some Species


Lake Hemet is located at the lowest end of Garner Valley, in the southern part of the San Jacinto Mountains, four miles east of Mountain Center, and about 20 miles east of the town of Hemet. The reservoir has 12 miles (19 km) of shoreline, which is at an elevation of 4340 feet (1322 m).

Lake Hemet is a reservoir constructed and owned by the Lake Hemet Water Company. The reservoir was built in order to supply water to develop the town of Hemet. It took four years to build the 122.5 foot tall dam, from 1891 to 1894. For sixteen years it was the tallest masonry dam in the world. After six feet of water poured over the top of the dam in January 1916, the dam was raised by 12.5 feet, to a height of 135 feet. Water has flowed over the dam several times since then, with only minor damage. (Source: Robinson and Risher, The San Jacinto Mountains, pp. 155 to 158; see also Historic Lake Hemet Dam)

For 37 years, the Water Company prohibited any public access to the lake, despite pressure from the public, and the Riverside County Board of Supervisors to allow it. Finally, they agreed in 1933 to open the lake to public use. (Robinson and Risher, pp. 158 to 159.) The eastern part of the lake is a public campground, with a day use fee of $25 and camping fees of $49 to $59 per night, entered from the Lake Hemet Campground Store area.

The Forest Service owns the land on the north shore of the lake, and has established a day use area for picnicking and fishing. An Adventure Pass ($5 / day) is required. The entrance to the Forest Service Land is along SR74 northwest of the Campground Store area, and southwest of Apple Canyon Road.

The flora of this area primarily comes from surveys by Bruce Watts of the Forest Service land, including the Lake Shore and the access road (see Fig. 4). The flora has been augmented by vouchers and iNaturalist observations.

The flora includes a separate checklist for species found in the area of the three bridges on SR74 of the streams that feed into the Lake. The northernmost bridge is signed "Antsell Rock Creek". The southernmost bridge is signed "South Fork San Jacinto River". The middle bridge is unsigned, since it drains a small unnamed area.

Most of the species in the flora are unrelated to the Lake, growing above the shoreline of the Lake and in the streams. However, it is of much interest to note the shoreline and aquatic species found in the Lake, since every one of them has had to be introduced into those areas since the Lake was filled 126 years ago. Many of those species presumably have arrived by birds or boats from areas outside of San Jacinto Mountain, since there are no permanent lakes here. We have only one ephemeral lake, Hidden Lake in Long Valley, which is at a much higher elevation, and has few species in common with Lake Hemet.

Reservoirs are a difficult place for shoreline and aquatic species to live, since the water levels change much more rapidly than they do in natural lakes. Plants may get established along the shoreline in years in which the lake level is low, and then become rapidly drowned by several feet of water when the lake fills up again from major storms; see the bottom right panel of Fig. 2. Plants may arrive one year, and be extirpated from the lake the next year. It might take several introductions before a species becomes established here. We don't know how long it takes for the lake to reach its equilibrium number of species, but we doubt it has already happened.

Shoreline, Aquatic, and Marsh Species Unique to Lake Hemet at San Jacinto Mountain

The most interesting species unique to Lake Hemet at San Jacinto Mountain are ones that live in habitats created by Lake Hemet. That includes shoreline species, aquatic species, and ones that live in marshy areas. These species would not have lived at San Jacinto Mountain prior to the creation of Lake Hemet and Lake Fulmor, and the smaller ponds created by cattle ranchers.

There are 14 such species known only from Lake Hemet at San Jacinto, listed in Table 1. It is quite interesting that all but one of these species are native to southern California. Most of these species are known only from a single small area at Lake Hemet (different areas for different species), possibly indicating that they haven't reached their full potential distribution there.

The year that each of those species was first vouchered, or seen by us, is also given. The first year any of those species was vouchered was 1909, 15 years after the Lake was created. The next years were 1938, 1964, 1971, and 1987, each with a single species. Four species were vouchered in 1999, which was probably the first comprehensive collection event. We observed five additional species from 2013 to 2018 in our surveys, with one of them seen previously in 1973, but not identified correctly until 2020. That may, or may not, imply that those five species were introduced to this area in the last 20 years.

The species are listed in alphabetical order by Scientific Name in the tables in this section.

Table 1. Shoreline, Aquatic, and Marsh Species Known Only From Lake Hemet at San Jacinto Mountain

#FamilScientific Name
Link goes to the Jepson eFlora
(*)Common Name
Link goes to Calphotos
Year first vouchered or seen
1ApiacBerula erectacutleaf water-parsnipV - 1964
2ChenoChenopodium rubrumred goosefootV - 1999
3CyperCyperus erythrorhizosredroot flatsedgeV - 1999
4AsterEclipta prostratafalse daisyV - 1999
5AsterEuthamia occidentaliswestern goldenrodS - 2014
6AraceLemna turionifera turion duckweedS - 1973
7VerbePhyla nodifloraturkey tangle fogfruitS - 2013
8RosacPotentilla norvegica*Norwegian cinquefoilV - 1971
9BrassRorippa sphaerocarparound-fruit yellow-cressV - 1999
10PolygRumex fueginusgolden dockV - 1909
11CyperSchoenoplectus californicusCalifornia tuleS - 2015
12AsterSolidago confinissouthern goldenrodV - 1987
13AsterSymphyotrichum subulatum var. parviflorumannual water-asterS - 2018
14ViolaViola nephrophyllanorthern bog violetV - 1938

Five additional shoreline, aquatic, and marsh species are known only from Lake Hemet and perhaps from one or two nearby locations in the area, listed in Table 2.

Two of those species have vouchers from "upper end of Garner Valley". As far as we know, the upper (southeastern) end of Garner Valley doesn't have any habitats similar to that of Lake Hemet. We speculate that locality might actually be the lower end of Garner Valley, which is at the base of the mountains to the northwest. It seems quite possible that the collector might have assumed the Lake Hemet area was the "upper end" of Garner Valley. If so, those two species should be added to the 12 species in Table 1.

Two of the other species in Table 2 have vouchers from very nearby areas, from similar human-created habitat on a smaller scale, ponds at K Flat Meadow, the Quinn Flat / Kenworthy area, and Keen Camp. The pond at K Flat Meadow may now be gone, after the scouring rains of 2019 took out its dam.

The fifth species, Amaranthus californicus, has vouchers from a County Park just below the Forest lower boundary.

Three species are known only from Lake Hemet and Lake Fulmor, listed in Table 3. Lake Fulmor is also a reservoir, formed by damming of Hall Canyon when SR243 was built in 1948.

All but one of the species in Tables 2 and 3 are also native.

Table 2. Shoreline, Aquatic, and Marsh Species Known Only From Lake Hemet and Perhaps One or Two Nearby Locations at San Jacinto Mountain

#FamilScientific Name
Link goes to the Jepson eFlora
(*)Common Name
Link goes to Calphotos
1AmaraAmaranthus californicusCalifornia amaranthOnly other is SR243 just below Forest boundary
2PoaceCrypsis schoenoides*swamp grassOnly other location is "upper end Garner Valley"
3PoaceLeptochloa fusca ssp. uninerviaMexican sprangletopOnly other location is "upper end Garner Valley"
4PoacePaspalum distichumknot grassVoucher from Keen Camp
5VerbeVerbena bracteatabracted verbenaVoucher from K Flat; seen at Quinn Flat pond

Table 3. Shoreline, Aquatic, and Marsh Species Known Only From Lake Hemet and Lake Fulmor at San Jacinto Mountain

#FamilScientific Name
Link goes to the Jepson eFlora
(*)Common Name
Link goes to Calphotos
1AzollAzolla filiculoidesmosquito fern
2CeratCeratophyllum demersumcoon's tail
3TyphaTypha latifoliabroadleaf cattail

Some of our favorite species listed in Tables 1 through 3 are shown in Fig. 3.

Fig. 3. Some of the species unique to Lake Hemet and/or Lake Fulmor at San Jacinto Mountain. Top Left: Azolla filiculoides, mosquito fern. Top Right: Phyla nodiflora, turkey tangle fogfruit. Bottom: Euthamia occidentalis, western goldenrod (with Baldy Mountain in background).
Pictures by Bruce Watts. Click on the pictures for larger versions.

Procedure for Compiling the Checklist

This checklist was compiled from a number of visits to the publicly-accessible area of Lake Hemet, including the bridges on SR74 over the eastern tributaries to the lake; from vouchers; and from iNaturalist observations.

Fig. 4 shows the Lake Hemet area, along with the surveyed portions.

Fig. 4. The Lake Hemet Area. The Survey Area along the north edge of the Lake is in the National Forest, accessible by foot or vehicle. The eastern area is a campground with a day use fee of $25 per day. The dam is at lower left, not publicly accessible. Three bridges over the eastern tributaries that were also surveyed for this Flora are circled at right. Click on the map for larger version.

Bruce surveyed the Lake Hemet area shown in Fig. 4 with the red lines on 31 July 2020, 3, 4, and 5 August 2020. He surveyed the bridge areas on 7 and 9 August 2020.

The bridge areas were also surveyed by Bruce, Tom, Nancy Accola and Don Rideout on 19 and 23 September 2019.

After a preliminary checklist was created from the above surveys, Bruce went back through his pictures from his many trips in prior years, and found additional species for the flora.

There were 210 observed species from the above.

On 16 August 2020, a search of iNaturalist observations by Tom found four additional species

On 19 August 2020, Tom searched vouchers for additional species. Vouchers were first searched in a rectangle that covered the Lake Hemet area, and then the localities were reviewed, keeping only those vouchers that clearly indicated they were from the Lake, or the Bridge area. That resulted in accepting 149 vouchers, which added 30 species to the Flora.

The Checklist below contains a total of 245 taxa the above sources.

See Notes on Some Species for some species that were excluded from this flora.

Species Checklist

The following gives some basic information about this checklist.


For this flora, the monkeyflower scientific names have been updated to ones used in the Jepson eFlora revision of 2018.

An asterisk before the common name indicates a non-native species.

The last two columns indicate whether a species was found in the Lake Hemet Area (column title LH), or in the three bridges area (column title Br). In those columns, an x indicates we observed it; a P indicates we observed it and we think it was planted; a W indicates it was only observed once, and is likely a Waif. Species with iN in those columns are ones we haven't seen, but were recorded at iNaturalist. Species with V in those columns are ones we haven't seen, but are vouchered from this area. Some of those vouchered species may not actually be from the Lake Hemet area, since the voucher locality may just be the nearest landmark.

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#FamilScientific Name
Link goes to the Jepson eFlora
(*)Common Name
Link goes to Calphotos
1AzollAzolla filiculoidesmosquito fernxx
2EquisEquisetum laevigatumsmooth scouring rushx
3CupreCalocedrus decurrensincense-cedarP
4PinacPinus coulteriCoulter pinex
5PinacPinus jeffreyiJeffrey pinexx
6SauruAnemopsis californicayerba mansax
7CeratCeratophyllum demersumcoon's tailV
8AdoxaSambucus nigra ssp. caeruleablue elderberryxx
9AmaraAmaranthus californicusCalifornia amaranthV
10AmaraAmaranthus powelliiPowell's amaranthV
11AmaraAmaranthus retroflexus*red-rooted amaranthx
12ApiacBerula erectacutleaf water-parsnipV
13ApiacConium maculatum*poison hemlockx
14ApocyAsclepias californicaCalifornia milkweedx
15ApocyAsclepias eriocarpaIndian milkweedx
16ApocyAsclepias fascicularisnarrow-leaf milkweedx
17AsterAchillea millefoliumyarrowxx
18AsterAmbrosia acanthicarpabur-ragweedxx
19AsterAmbrosia psilostachyawestern ragweedx
20AsterAnisocoma acaulisscale-budx
21AsterAnthemis cotula*dog-fennelW
22AsterArtemisia dracunculuswild tarragonx
23AsterArtemisia ludoviciana ssp. incomptamountain mugwortxx
24AsterArtemisia tridentatabig sagebrushxx
25AsterBaccharis salicifolia ssp. salicifoliamule fatx
26AsterChaenactis glabriuscula var. lanosawoolly yellow chaenactisV
27AsterCirsium occidentale var. californicumCalifornia thistlexx
28AsterCirsium scariosum var. citrinummeadow thistlex
29AsterCirsium vulgare*bull thistlexx
30AsterCorethrogyne filaginifoliaCalifornia-asterxx
31AsterDeinandra mohavensisMojave tarplantxx
32AsterDieteria asteroideshoary asterx
33AsterEclipta prostratafalse daisyx
34AsterEricameria nauseosa var. oreophilathreadleaf common rabbitbrushx
35AsterEricameria pinifoliapine goldenbushxx
36AsterErigeron canadensishorseweedxx
37AsterErigeron foliosus var. foliosusleafy daisyx
38AsterEriophyllum confertiflorum var. confertiflorumgolden yarrowx
39AsterEriophyllum wallaceiWallace's woolly daisyx
40AsterEuthamia occidentaliswestern goldenrodx
41AsterGnaphalium palustrewestern marsh cudweedxx
42AsterGutierrezia sarothraematchweedxx
43AsterHelianthus gracilentusslender sunflowerx
44AsterHeterotheca grandifloratelegraph weedx
45AsterHeterotheca sessiliflorafalse goldenasterxx
46AsterLactuca serriola*prickly lettucexx
47AsterLasthenia gracilisgoldfieldsx
48AsterLayia platyglossacommon tidy-tipsV
49AsterLessingia glandulifera var. glanduliferasticky lessingiaxx
50AsterMatricaria discoidea*pineapple weedx
51AsterPseudognaphalium beneolensfragrant everlastingx
52AsterPseudognaphalium californicumCalifornia everlastingxx
53AsterPseudognaphalium luteoalbum*common cudweedxx
54AsterPseudognaphalium stramineumcotton-batting plantx
55AsterSolidago confinissouthern goldenrodx
56AsterSolidago velutina ssp. californicagoldenrodxx
57AsterSonchus asper ssp. asper*prickly sow thistlex
58AsterStephanomeria exigua ssp. deaneislender wreathplantxx
59AsterStephanomeria virgatatwiggy wreath plantxx
60AsterSymphyotrichum ascendenslong-leaved asterxx
61AsterSymphyotrichum subulatum var. parviflorumannual water-asterx
62AsterTaraxacum officinale*common dandelionx
63AsterTragopogon dubius*yellow salsifyx
64AsterUropappus lindleyisilver puffsx
65AsterWyethia ovatasouthern mule's earsx
66BoragCryptantha intermedia var. intermediapopcorn flowerxx
67BoragCryptantha micrantha var. lepidamountain red-root cryptanthax
68BoragCryptantha muricataprickly cryptanthaV
69BoragCryptantha simulanspine cryptanthaV
70BoragEriodictyon crassifolium var. crassifoliumthick-leaved yerba santax
71BoragHeliotropium curassavicum var. oculatumseaside heliotropexx
72BoragNemophila menziesii var. menziesiibaby blue eyesx
73BoragPhacelia imbricata var. patulaimbricate phaceliax
74BoragPhacelia minorwild canterbury bellsx
75BoragPlagiobothrys collinus var. ursinusBear Valley popcorn flowerx
76BoragPlagiobothrys tenellusslender popcorn flowerx
77BrassBoechera californicaCalifornia elegant rock-cressx
78BrassDescurainia sophia*herb sophiaxx
79BrassHirschfeldia incana*shortpod mustardxx
80BrassLepidium virginicumwild pepper-grassxx
81BrassNasturtium officinalewater cressx
82BrassRorippa curvisiliquacurvepod yellow-cressV
83BrassRorippa sphaerocarparound-fruit yellow-cressV
84BrassSisymbrium irio*London rocketx
85CactaOpuntia phaeacanthadesert prickly-pearx
86CampaHeterocodon rariflorumfew-flowered heterocodonx
87CampaNemacladus ramosissimusNuttall's nemacladusV
88CapriLonicera subspicata var. denudatasouthern honeysucklex
89CaryoSpergularia rubra*red sandspurryx
90ChenoAtriplex rosea*tumbling oraclex
91ChenoChenopodium berlandieripit-seed goosefootx
92ChenoChenopodium fremontiiFremont's goosefootx
93ChenoChenopodium rubrumred goosefootx
94ChenoSalsola tragus*Russian thistlexx
95ConvoCuscuta californica var. papillosapapillate dodderx
96CrassDudleya saxosa ssp. aloidesdesert dudleyax
97DatisDatisca glomerataDurango rootx
98DipsaDipsacus fullonum*wild teaselx
99EricaArctostaphylos glaucabigberry manzanitax
100EricaArctostaphylos pringlei ssp. drupaceapink-bracted manzanitaV
101EricaArctostaphylos pungensMexican manzanitax
102EuphoChamaesyce albomarginatarattlesnake weedxx
103EuphoChamaesyce serpyllifolia ssp. serpyllifoliathyme-leafed spurgeiN
104FabacAcmispon americanus var. americanusSpanish cloverx
105FabacAcmispon argophyllus var. argophyllussouthern California silver-lotusV
106FabacAcmispon heermannii var. heermanniisilky lotusxx
107FabacAmorpha fruticosawestern false-indigox
108FabacAstragalus douglasii var. parishiiParish' Jacumba milk-vetchx
109FabacHosackia crassifolia var. crassifoliabroad-leaved lotusx
110FabacHosackia oblongifolia var. oblongifoliastreambank lotusV
111FabacLathyrus vestituscommon Pacific peax
112FabacLotus corniculatus*bird's-foot lotusx
113FabacLupinus bicolordwarf lupinex
114FabacLupinus concinnus ssp. optatusshowy bajada lupinex
115FabacLupinus excubitus var. austromontanusmountain grape-soda lupinex
116FabacLupinus latifolius var. parishiiParish's lupinex
117FabacMedicago sativa*alfalfax
118FabacMelilotus albus*white sweetcloverx
119FabacMelilotus indicus*sourcloverxx
120FabacTrifolium obtusiflorumcreek cloverx
121FabacTrifolium wormskioldiicows cloverV
122FabacVicia villosa*purple vetchx
123FagacQuercus (planted)oak (planted)P
124FagacQuercus chrysolepiscanyon live oakx
125FagacQuercus kelloggiiCalifornia black oakx
126FagacQuercus wislizeni var. frutescensinterior live oakx
127FagacQuercus Xmorehusoracle oakx
128GentiFrasera parryiParry's green-gentianx
129GentiZeltnera venustacanchalaguaxx
130GeranErodium cicutarium*redstem filareexx
131LamiaMonardella breweri ssp. lanceolatamustang mintV
132LamiaSalvia columbariaechiax
133LamiaScutellaria bolanderi ssp. austromontanasouthern skullcapV
134LamiaStachys rigidarigid hedge-nettlex
135LamiaTrichostema austromontanum ssp. austromontanumsouthern bluecurlsV
136LinacLinum lewisii var. lewisiiLewis' flaxx
137LoasaMentzelia veatchianaVeatch's blazing starx
138MalvaSidalcea sparsifoliacheckerbloomxx
139MalvaSphaeralcea ambigua var. rugosadesert globemallowxx
140MontiCalyptridium monandrumsand cressx
141NyctaAbronia villosa var. auritahairy sand verbenaxx
142OnagrCamissoniopsis confusaSan Bernardino suncupV
143OnagrEpilobium brachycarpumautumn willowweedxx
144OnagrEpilobium canum ssp. latifoliummountain California-fuchsiax
145OnagrEpilobium densiflorumspike primrosex
146OnagrEpilobium glaberrimum ssp. glaberrimumglaucus willowherbx
147OnagrOenothera californica ssp. californicaCalifornia evening-primrosexx
148OnagrOenothera elata ssp. hirsutissimaHooker's evening-primrosexx
149OrobaCastilleja foliolosawoolly Indian paintbrushx
150OrobaCastilleja minor ssp. spiralislesser paintbrushx
151OrobaCordylanthus rigidus ssp. setigerbristly bird's beakx
152PhrymDiplacus brevipeswide-throated yellow monkeyflowerx
153PhrymDiplacus fremontiiFremont's monkeyflowerx
154PhrymErythranthe cardinalisscarlet monkeyflowerx
155PhrymErythranthe diffusaPalomar monkeyflowerx
156PhrymErythranthe floribundafloriferous monkeyflowerx
157PhrymErythranthe guttatacommon monkeyflowerxx
158PhrymErythranthe nasutashy monkeyflowerx
159PhrymErythranthe rubellalittle redstem monkeyflowerx
160PhrymMimetanthe pilosafalse monkeyflowerxx
161PlantAntirrhinum coulterianumCoulter's snapdragonx
162PlantPenstemon centranthifoliusscarlet buglerxx
163PlantPenstemon spectabilis var. spectabilisshowy penstemonx
164PlantPlantago lanceolata*English plantainx
165PlantPlantago major*common plantainxx
166PlantVeronica anagallis-aquatica*water speedwellxx
167PlantVeronica peregrina ssp. xalapensispurslane speedwellx
168PolemAllophyllum glutinosumsticky false-giliaxx
169PolemEriastrum densifolium ssp. austromontanumsouthern mountain woolly-starxx
170PolemEriastrum sapphirinum ssp. sapphirinumsapphire woolly-starxx
171PolemLeptosiphon liniflorusflax-flowered linanthusxx
172PolygChorizanthe leptothecaPeninsular spineflowerx
173PolygEriogonum fasciculatum var. polifoliumCalifornia buckwheatxx
174PolygEriogonum gracile var. gracileslender buckwheatx
175PolygEriogonum gracile var. incultumslender buckwheatVx
176PolygEriogonum wrightii var. membranaceumWright's buckwheatxx
177PolygPersicaria lapathifoliawillow weedxx
178PolygPolygonum aviculare ssp. depressum*knotweedxx
179PolygRumex californicuswillow-leaved dockx
180PolygRumex crispus*curly dockx~
181PolygRumex fueginusgolden dockiN
182PortuPortulaca oleracea*common purslanexx
183RanunDelphinium parryi ssp. parryiblue larkspurV
184RanunRanunculus aquatilis var. diffususwater crowfootx
185RanunRanunculus cymbalariaRocky Mountain buttercupx
186RanunRanunculus sceleratus var. sceleratuscursed crowfootxx
187RhamnCeanothus cuneatus var. cuneatusbuck brushx
188RhamnCeanothus leucodermischaparral whitethornx
189RhamnFrangula californicaCalifornia coffeeberryx
190RhamnRhamnus ilicifoliahollyleaf redberryx
191RosacAdenostoma fasciculatumchamisex
192RosacAdenostoma sparsifoliumred shanksx
193RosacCercocarpus betuloides var. betuloidesbirch-leaf mountain-mahoganyx
194RosacDrymocallis glandulosa var. reflexasticky cinquefoilxx
195RosacPotentilla norvegica*Norwegian cinquefoilx
196RosacPrunus virginiana var. demissawestern choke-cherryx
197RosacRosa californicaCalifornia wild rosexx
198RubiaGalium angustifolium ssp. angustifoliumnarrowleaf bedstrawx
199SalicPopulus fremontii ssp. fremontiiFremont cottonwoodxx
200SalicSalix exigua var. hindsianaHinds' narrowleaf willowx
201SalicSalix laevigatared willowxx
202SalicSalix lasiolepisarroyo willowxx
203ScropLimosella acaulisstemless mudwortiN
204ScropScrophularia californicaCalifornia bee plantx
205ScropVerbascum thapsus*common mulleinx
206SolanDatura wrightiisacred daturax
207SolanNicotiana attenuatacoyote tobaccoxx
208SolanPetunia parviflorawild petuniax
209UrticUrtica dioica ssp. holosericeastinging nettlexx
210VerbePhyla nodifloraturkey tangle fogfruitx
211VerbeVerbena bracteatabracted verbenaxx
212ViolaViola nephrophyllanorthern bog violetx
213ViscaArceuthobium campylopodumpine dwarf-mistletoex
214ViscaPhoradendron serotinum ssp. tomentosumoak mistletoex
215ZygopTribulus terrestris*puncture-vinexx
216AgavaHesperoyucca whippleichaparral yuccax
217AraceLemna turionifera turion duckweedx
218CyperCyperus erythrorhizosredroot flatsedgeV
219CyperCyperus squarrosusbearded flatsedgeV
220CyperEleocharis macrostachyacommon spikerushV
221CyperEleocharis palustriscommon spikerushV
222CyperEleocharis parishiiParish's spikerushV
223CyperSchoenoplectus californicusCalifornia tulexx
224CyperScirpus microcarpuspanicled bulrushx
225JuncaJuncus balticus ssp. aterwire rushV
226JuncaJuncus mexicanusMexican rushx
227JuncaJuncus oxymerispointed rushx
228LiliaCalochortus palmeri var. munziiSan Jacinto mariposa lilyx
229PoaceAristida purpureapurple three-awnx
230PoaceBromus diandrus*ripgut bromex
231PoaceBromus madritensis ssp. rubens*red bromex
232PoaceBromus tectorum*downy bromexx
233PoaceCrypsis schoenoides*swamp grassx
234PoaceDactylis glomerata*orchard-grassx
235PoaceElymus glaucusblue wildryex
236PoaceElymus hispidus*intermediate wheatgrassx
237PoaceLeptochloa fusca ssp. uninerviaMexican sprangletopV
238PoaceMuhlenbergia asperifoliasparklergrass, scratchgrassx
239PoaceMuhlenbergia rigensdeergrassx
240PoacePaspalum distichumknot grassV
241PoacePolypogon monspeliensis*rabbits-foot grassxx
242PoaceSchismus barbatus*Mediterranean schismusx
243PotamPotamogeton pusillussmall pondweedV
244TyphaTypha latifoliabroadleaf cattailx

Notes on Some Species

Centaurea solstitialis, yellow star thistle. There is a voucher of it from 1959 from one of the bridges over SR74, but no one else has ever seen it anywhere in the San Jacinto Mountains. The collector also collected from lower elevations in Riverside County on the same day, where it has been collected by others. It is thus possible he gave the wrong locality for this collection. We have therefore rejected this species from the list.

Cryptantha corollata, Coast Range cryptantha. A specimen was collected by A. C. Sanders and Mitch Provance on 26 September 1999 from the "north shore day use area". We suspect that specimen is a depauperate C. muricata, since the most significant difference between those two species is the number of nutlets. C. corollata is otherwise known only from the Riverside / Hemet / Temecula Valley at lower elevation. But we'll look for this in the future, to see if there is indeed a population of this species here.

Ribes roezlii, Sierra gooseberry. There is an iNat observation of this species with a location that plots in the water area. Tom surveyed the area near that voucher location without finding any plants of that species. Bruce has only seen that species to the west, in the Keen Camp Summit area. We have removed this species from the list until a good location for it here is known.

Zeltnera exaltata, desert centaury. There are three vouchers of this species, all from the same collection event in 1935. However, we suspect these are just the four-petaled form of Zeltnera venusta, which is not infrequently found amidst a much larger number of plants with the usual five petals. Bruce has seen such plants twice in nearby areas, at K Flat and Apple Canyon Creek. As far as we know, there are no populations of Zeltnera exaltata in this area.

We thank Nancy Accola and Don Rideout for their help in the bridge surveys on 19 and 23 September 2019, and Wayne Armstrong for the determination of Lemna turionifera, turion duckweed.

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Last update: 14 September 2020