Flora of Icehouse Canyon, San Gabriel Mountains

The Flora


This flora was made from a voucher search of the Consortium of California Herbaria on 12 October 2017; two field trips, on 16 and 26 October 2017; and the species shown in Michael Charters' Photo Gallery of Icehouse Canyon, June 2008.

Vouchers. A geographic coordinate search, for vouchers with coordinates, was made for the region of 34.24 to 34.26° north latitude and -117.64 to -117.60° east longitude. No separate search was made for non-georeferenced vouchers.

This search region includes all of the Icehouse Canyon trail up to about 7100 feet, but does not include the last half mile of the trail up to Icehouse Saddle.

The vouchers were manually sorted into ones in Icehouse Canyon in the area of the Icehouse Canyon Trail, including the Chapman Trail, and those away from those trails, which include vouchers from tributaries of Icehouse Canyon, and from near the mouth of Icehouse Canyon. The purpose was to clearly indicate which species one would expect to see by hiking the area near those trails. The other vouchers were included to make the flora of the trail area more complete, to make up for species along those trails that were not vouchered from that area.

The 330 vouchers from the Icehouse Canyon trails area were collected by many different people, with no dominant collector. Interestingly, the top two collectors were I.M. Johnston (56 vouchers, 17% of the 330 vouchers) and S.B. Parish (39 vouchers, 12%), with most of those vouchers from the year 1918! Orlando Mistretta was #3 on that list, collecting 35 vouchers from 1989 to 1993.

In contrast, of the 244 vouchers from the nearby area, R.G. Swinney was the dominant collector by far, with 177 vouchers, 72% of all the vouchers!

Two vouchered species were tossed as being probable misdeterminations: Acmispon argyraeus and Carex multicostata. There are only two widely-separated vouchers at SnGb of Acmispon argyraeus, which is given as being only at SnBr, SnJt, DMtns in the Jepson eflora. There is only a single 1918 voucher at SnGb, by Parish in 1918, of Carex multicostata, which is given as being only at CaRH, SNH, SnBr, SnJt in the Jepson eflora.

Field Trips. On 16 October 2017, Tom Chester, Walt Fidler, Nancy Accola, James Dillane and Mike Crouse surveyed from the parking area to the lower Chapman Trail junction, and then up the Chapman Trail to the Cedar Glen Trail Camp. The species were recorded in the field, but an estimate of the plant abundances was not made until two days later.

On 26 October 2017, Tom Chester, Walt Fidler and Nancy Accola surveyed the Icehouse Canyon / Chapman Trail loop. The species were recorded in the field, and most abundances estimated in the field as we surveyed. A number of species were counted individually as we surveyed.

The Flora

See Michael Charters' Photo Gallery of Icehouse Canyon, June 2008 for pictures of 43 of these species.

See Information about the order in which the species are presented, and the links from the Scientific Name and Common Name.

The column with header #V gives the number of vouchers for the Icehouse Canyon Trail and Chapman Trail area, from a voucher search on 12 October 2017 of the Consortium of California Herbaria.. A CF in this column indicates a species with a Calflora observation by Diego Villalobos of the Forest Service.

The column with header #Pls gives the minimum number of plants for each observed species, up to a maximum of 99 plants. A MC in this column indicates a species present in Michael Charters' Photo Gallery that we didn't see in the field surveys. A P after the number of plants indicates a species planted amidst the cabins.

Species that were not found in our surveys, or by Michael Charters, and that have no voucher for the Icehouse Canyon Trail and Chapman Trail area, but that do have vouchers from a larger area surrounding Icehouse Canyon itself, are included in the flora, but have no entries in any column. These species were vouchered from tributaries of Icehouse Canyon; from near the mouth of Icehouse Canyon; or from the immediate vicinity of Icehouse Saddle. Those species may or may not be present from Icehouse Canyon proper or the Chapman Trail. In the future, if we ever survey this area at prime time, we'll remove any such species that we do not record in this area.

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#FamScientific Name(*)Common Name#V#Pls
1SelSelaginella asprellabluish spike-moss 99
2DryDryopteris argutaCalifornia wood fern 1
3DryPolystichum imbricans ssp. imbricansrock sword fern 25
4DryPolystichum scopulinummountain holly fern  
5EquEquisetum laevigatumsmooth scouring rush 50
6PteCheilanthes covilleibeady lipfern147
7PtePellaea mucronata var. californicaCalifornia cliff-brake399
8PtePellaea mucronata var. mucronatabird's-foot fern1 
9WooCystopteris fragilisbrittle bladder fern  
10CupCalocedrus decurrensincense-cedar599
11CupJuniperus grandisSierra juniper2 
12PinAbies concolorwhite fir 99
13PinPinus attenuataknobcone pine1 
14PinPinus jeffreyiJeffrey pine199
15PinPinus lambertianasugar pine199
16PinPinus monophyllapinyon pine1 
17PinPinus ponderosa var. pacificaponderosa pine130
18PinPseudotsuga macrocarpabigcone-spruce299
19LauUmbellularia californicaCalifornia bay120
20AdoSambucus nigra ssp. caeruleablue elderberry34
21ApiOreonana vestitawoolly mountain-parsley  
22ApiOsmorhiza berteroimountain sweet-cicely  
23ApiTauschia parishiiParish's tauschia1 
24ApoCycladenia humilis var. venustashowy cycladenia  
25ApoVinca major*greater periwinkle 99
26AraAralia californicaelk's clover74
27AraHedera helix*English ivyCF99P
28AstArtemisia douglasianamugwort199
29AstBrickellia californicaCalifornia brickellbush399
30AstBrickellia microphylla var. microphyllalittle-leaved brickellia  
31AstChaenactis santolinoidessantolina pincushion3 
32AstCirsium occidentale var. californicumCalifornia thistle1 
33AstCirsium vulgare*bull thistleCF2
34AstCorethrogyne filaginifoliaCalifornia-aster199
35AstEricameria cuneata var. cuneatarock goldenbush199
36AstEricameria nauseosa var. bernardinaSan Bernardino rubber rabbitbrush1 
37AstEricameria nauseosa var. oreophilathreadleaf common rabbitbrush 99
38AstEricameria parishii var. parishiiParish's goldenbush  
39AstEricameria pinifoliapine goldenbush 23
40AstErigeron canadensishorseweed 2
41AstErigeron foliosus var. foliosusleafy daisy499
42AstEriophyllum confertiflorum var. confertiflorumgolden yarrow530
43AstHelianthus gracilentusslender sunflower  
44AstHeterotheca sessiliflora ssp. fastigiataerect goldenaster1 
45AstHieracium albiflorumwhite hawkweed2 
46AstHieracium horridumprickly hawkweed1 
47AstHulsea heterochromared-rayed hulsea  
48AstPseudognaphalium beneolensfragrant everlasting 45
49AstPseudognaphalium californicumCalifornia everlasting 1
50AstPseudognaphalium microcephalumwhite everlasting 1
51AstPseudognaphalium stramineumcotton-batting plant2 
52AstSenecio astephanusSan Gabriel ragwort  
53AstSenecio flaccidus var. douglasiibush senecio 1
54AstSolidago velutina ssp. californicagoldenrod499
55AstSonchus asper ssp. asper*prickly sow thistle  
56AstStephanomeria cichoriaceachicory-leaved stephanomeria 6
57AstStephanomeria exigua ssp. coronariaslender wreathplant 2
58AstStephanomeria pauciflorawire-lettuce  
59AstStephanomeria virgata ssp. pleurocarpatwiggy wreath plant  
60AstTetradymia canescensspineless horsebrush  
61BerBerberis aquifoliumOregon grape1 
62BetAlnus rhombifoliawhite alder199
63BorCryptantha affiniscommon cryptantha  
64BorCryptantha echinellaprickly cryptantha  
65BorCryptantha muricata var. denticulataprickly-nut cryptantha  
66BorCryptantha muricata var. jonesiiJones' prickly-nut cryptantha310
67BorCryptantha simulanspine cryptantha6 
68BorEmmenanthe penduliflora var. penduliflorawhispering bells MC
69BorEriodictyon parryipoodle-dog bush1 
70BorEriodictyon trichocalyx var. trichocalyxsmoothleaf yerba santa599
71BorPhacelia austromontanasouthern Sierra phacelia7 
72BorPhacelia brachylobashort-lobed phacelia1 
73BorPhacelia curvipescurve-stem phacelia  
74BorPhacelia davidsoniiDavidson's phacelia1 
75BorPhacelia imbricata var. imbricataimbricate phacelia1 
76BorPhacelia longipeslong-stalk phacelia6 
77BorPhacelia ramosissimabranching phacelia199
78BraBoechera arcuataarched elegant rock-cress120
79BraBoechera californicaCalifornia elegant rock-cress310
80BraBoechera platyspermabroad-seeded rock-cress1 
81BraBoechera repandaYosemite rockcress21
82BraCaulanthus amplexicaulisclasping-leaved caulanthus3 
83BraDraba corrugataSouthern California draba1 
84BraErysimum capitatum var. capitatumwestern wallflower330
85BraHirschfeldia incana*shortpod mustard 50
86BraLepidium virginicum ssp. menziesiiwild pepper-grass 2
87CacOpuntia phaeacanthadesert prickly-pear  
88CapLonicera subspicata var. denudatasouthern honeysuckle31
89CarMinuartia douglasiiDouglas' sandwort  
90CarSilene parishiiParish's campion1 
91CarSilene verecundawhite catch-fly  
92ConCuscuta californicaCalifornia dodder1 
93CraDudleya cymosa ssp. pumilacanyon dudleya26
94EriArctostaphylos glaucabigberry manzanita220
95EriArctostaphylos parryanaParry manzanita499
96EriArctostaphylos patulagreen-leaf manzanita175
97EriPterospora andromedeapinedrops 1
98EriPyrola dentatatoothed wintergreen23
99EriSarcodes sanguineasnow-plant1 
100FabAcmispon argophyllus var. argophyllussouthern California silver-lotus410
101FabAcmispon nevadensis var. davidsoniiDavidson's lotus 10
102FabLupinus elatussilky lupine1 
103FabRobinia pseudoacacia*black locust 15P
104FabSpartium junceum*Spanish broom 18
105FagChrysolepis sempervirensbush chinquapin 12
106FagQuercus chrysolepiscanyon live oak299
107GarGarrya veatchiicanyon silktassel35
108GroRibes cereum var. cereumwax currant34
109GroRibes nevadensemountain pink currant1399
110GroRibes roezlii var. roezliiSierra gooseberry227
111LamMarrubium vulgare*horehound 11
112LamMonardella australis ssp. cinereagray monardella  
113LamStachys albenscobwebby hedge-nettle250
114LoaMentzelia dispersascattered blazing star7 
115LoaMentzelia laevicaulisgiant blazing star219
116LoaMentzelia micranthachaparral blazing star  
117MalFremontodendron californicumflannelbush730
118MonCalyptridium monospermumpussy paws1 
119MonClaytonia parviflora ssp. viridisgreen miner's lettuce1 
120OleSyringa vulgaris*cultivated lilac 3P
121OnaCamissoniopsis confusaSan Bernardino suncup  
122OnaClarkia rhomboideadiamond-petaled clarkia2 
123OnaEpilobium canum ssp. latifoliummountain California-fuchsia299
124OnaEpilobium ciliatum ssp. ciliatumwillowherb11
125OnaEpilobium glaberrimum ssp. glaberrimumglaucus willowherb2 
126OnaGayophytum diffusum ssp. parviflorumgroundsmoke1 
127OnaGayophytum heterozygumzig-zag gayophytum  
128OnaGayophytum oligospermumpinegrove groundsmoke 1
129OnaOenothera elata ssp. hirsutissimaHooker's evening-primrose 5
130OroCastilleja applegatei ssp. martiniiMartin's paintbrush12
131OroCastilleja foliolosawoolly Indian paintbrush MC
132OroCordylanthus rigidus ssp. setigerbristly bird's beak299
133OroOrobanche fasciculataclustered broomrape2 
134OroPedicularis semibarbatapine lousewort2 
135PapArgemone munitaprickly poppy 20
136PapEhrendorferia chrysanthagolden ear drops1 
137PhrMimulus aurantiacusbush monkeyflower 80
138PhrMimulus brevipeswide-throated yellow monkeyflower MC
139PhrMimulus cardinalisscarlet monkeyflower199
140PhrMimulus floribundusfloriferous monkeyflower3 
141PhrMimulus guttatuscommon monkeyflower  
142PhrMimulus johnstoniiJohnston's monkeyflower2 
143PlaCollinsia torreyi var. wrightiiWright's collinsia  
144PlaKeckiella ternata var. ternatawhorledleaf penstemon245
145PlaPenstemon grinnellii var. grinnelliiGrinnell's beardtongue499
146PlaPenstemon labrosusSan Gabriel beardtongue  
147PlaPenstemon rostriflorusbeaked penstemon117
148PolGilia capitata ssp. abrotanifoliaglobe gilia  
149PolGilia ochroleuca ssp. vividaSan Gabriel Mountain gilia5 
150PolLeptosiphon ciliatuswhisker-brush1 
151PolLinanthus californicusprickly phlox2 
152PolLinanthus pungens1099
153PolPhlox diffusaspreading phlox1 
154PolSaltugilia splendens ssp. grantiiGrant's gilia650
155PolEriogonum davidsoniiDavidson's buckwheat198
156PolEriogonum fasciculatum var. polifoliumCalifornia buckwheat199
157PolEriogonum nudum var. pauciflorumnaked buckwheat  
158PolEriogonum saxatilerock buckwheat399
159PolEriogonum umbellatum var. minusalpine sulfur-flowered buckwheat 10
160PolEriogonum wrightii var. subscaposumWright's buckwheat299
161PolSidotheca caryophylloideschickweed oxytheca1 
162RanAquilegia formosawestern columbine599
163RanClematis ligusticifoliavirgin's bower 99
164RhaCeanothus leucodermischaparral whitethorn199
165RhaFrangula californica ssp. californicaCalifornia coffeeberry170
166RhaRhamnus ilicifoliahollyleaf redberry 30
167RosAmelanchier utahensisUtah service-berry2 
168RosCercocarpus betuloides var. betuloidesbirch-leaf mountain-mahogany 10
169RosCercocarpus ledifoliuscurl-leaf mountain-mahogany 8
170RosDrymocallis glandulosa var. glandulosasticky cinquefoil1 
171RosDrymocallis glandulosa var. reflexasticky cinquefoil620
173RosHolodiscus discolor var. microphyllusmountain spray 10
174RosPrunus ilicifolia ssp. ilicifoliahollyleaf cherry31
175RosPrunus virginiana var. demissawestern choke-cherry1 
176RosRubus armeniacus*Himalaya blackberryCF 
177RosRubus leucodermiswhite-bark raspberry299
178RubGalium angustifolium ssp. gabrielenseSan Antonio Canyon bedstraw399
179RubGalium angustifolium ssp. nudicaulenaked-stem bedstraw150
180RubGalium aparinecommon bedstraw130
181SalSalix lasiolepisarroyo willow4 
182SalSalix scoulerianaScouler's willow2~25
183SapAcer macrophyllumbigleaf maple299
184SapAcer negundobox elder 1P
185SaxBoykinia rotundifoliaround-leaved boykinia299
186SaxHeuchera elegansurn-flowered alumroot596
187SimAilanthus altissima*tree-of-heavenCF 
188SolNicotiana attenuatacoyote tobacco2 
189SolSolanum xantipurple nightshade 10
190UrtUrtica dioica ssp. holosericeastinging nettle 99
191VioViola purpureagoosefoot violet  
192VisPhoradendron bolleanumfir mistletoe 99
193VisPhoradendron bolleanumdense mistletoe  
194VisPhoradendron serotinum ssp. tomentosumoak mistletoe 35
195AgaHesperoyucca whippleichaparral yucca 99
196AllAllium monticolaSan Bernardino Mountain onion41
197CypCarex almasturdy sedge5 
198CypCarex athrostachyaslender-beak sedge 20
199CypCarex densadense sedge  
200CypCarex fractafragile sheath sedge415
201CypCarex hasseisaltsedge1 
202CypCarex multicaulisforest sedge15
203CypCarex praegracilisclustered field sedge1 
204CypCarex rossiiRoss' sedge1 
205CypCarex subfuscabrown sedge5 
206IriSisyrinchium bellumblue-eyed grass1 
207JunJuncus duraniiDuran's rush  
208LilCalochortus invenustusplain mariposa lily MC
209OrcCorallorhiza maculataspotted coralroot1 
210OrcEpipactis giganteastream orchid330
211PoaAgrostis exarataspike bentgrass3 
212PoaAgrostis gigantea*giant bentgrass  
213PoaAgrostis idahoensisIdaho bentgrass  
214PoaAgrostis stolonifera*creeping bentgrass1 
215PoaBromus carinatus var. carinatusCalifornia brome299
216PoaBromus diandrus*ripgut brome 99
217PoaBromus tectorum*downy brome 99
218PoaElymus elymoidessquirreltail 10
219PoaElymus glaucus ssp. glaucusblue wildrye310
220PoaElymus stebbinsiiStebbins' wildrye1 
221PoaFestuca microstachyssmall fescue  
222PoaMelica imperfectacoast-range melic 99
223PoaMuhlenbergia californicaCalifornia muhly3 
224PoaMuhlenbergia richardsonismat muhly3 
225PoaPoa secundaone-sided blue grass 99
226PoaPolypogon viridis*green bentgrass 20
227PoaStipa coronatagiant needlegrass 50
228PoaStipa occidentalis var. californicaCalifornia needlegrass  
229PoaStipa parishii var. parishiiParish's needlegrass2 

Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/) on 12 October 2017.

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Copyright © 2017-2018 by Tom Chester, Walt Fidler, Nancy Accola, James Dillane, Mike Crouse and Michael Charters.
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Last update: 7 January 2018