Plant Guide to West Bank Trail, Eaton Canyon, San Gabriel Mountains

This is a working list, about which we make no guarantees at all until we officially release it. Use at your own risk!

Introduction and Explanation of Plant Trail Guides

Introduction
Highlights of This Trail
Fieldwork Dates and Summary of List Changes With Time
The Plant Guide
Comments On Specific Species

Introduction

See Flora of Lower Eaton Canyon.

Highlights of This Trail

The botanical highlights of this trail are:

Number of Unique Taxa On This Trail

The following histogram gives the number of trails in our database that contain each taxon on this trail. We had 34 trails in our database when this histogram was made. A number of "1" means the taxon has only been found on this trail among the trails in our database.

Number of Trails Containing A TaxonNumber Of Taxa On This Trail% of Taxa On This Trail
11112%
277%
31011%
488%
577%
688%
766%
833%
955%
1022%
1133%
1222%
1322%
1422%
1533%
1655%
1766%
1822%
1922%
2011%
2100%
Total Taxa95100%

We found 15 additional species not in the above table, since they have not been identified yet. The unidentified ones are marked with ? or sp in the id? column in the guide.

Fieldwork Dates and Summary of List Changes With Time

The following table gives the dates the trail was walked and taxa recorded. After each visit, the table gives the total number of taxa on the list and the breakdown of the taxa without positive identification. See Explanation of Plant Trail Guides to understand the symbols below.

Visit DateVisit ## taxa# "?"# "sp"# "~"# "ssp"Comments
10/24/200219321008includes species from 4 visits earlier in the year on 10 and 25 March, and 1 and 10 April, in 2002
12/3/200221076925 
1/12/200331106925 
3/25/20034only one change made; more coming

The Plant Guide

Miles#id?Common NameLatin Name#here#all
    This plant guide for the West Bank Trail begins after the end of the "mitigation area". The following landmarks will guide you to the beginning of this plant guide.
0.00   Eaton Canyon Nature Center - head north in the parking lot.
0.10   Gate at north end of parking lot.
0.18   North end of picnic area.
0.23   Trail jct. The main Park Road Trail curves right and crosses the Wash. The West Bank Trail goes off to the left, heading directly north; take it.
0.25   Beginning of this plant guide at the third Coast Live Oak, where the trail bends slightly to the left. Mileage reset to 0.00.
0.00l1 coast live oakQuercus agrifolia var. agrifolia / 16
0.00l2 branching phaceliaPhacelia ramosissima var. latifolia / 5
0.00r3ssp*rattail fescueVulpia myuros / 4
0.00l4 *red bromeBromus madritensis ssp. rubens / 17
0.00l5 toyonHeteromeles arbutifolia / 19
0.00l6 California sagebrushArtemisia californica / 19
0.00l7 *horehoundMarrubium vulgare / 11
0.00l8 California brickellbushBrickellia californica / 14
0.00l9 erect goldenasterHeterotheca sessiliflora ssp. fastigiata / 3
0.00l10 (heartleaf penstemon, Keckiella cordifolia.)
0.00l11 poison oakToxicodendron diversilobum / 15
0.00l12?unk stout tufted grass
0.00l13 small-flowered melicaMelica imperfecta / 14
0.01 14?baby thistle?
0.01l15 *bur chervilAnthriscus caucalis / 4
0.01r16 *sweet alyssumLobularia maritima / 1
0.01 17~one-sided bluegrassPoa secunda ssp. secunda / 10
0.01l18 heartleaf penstemonKeckiella cordifolia / 11
0.01l19 mugwortArtemisia douglasiana / 13
0.01l  Sprinkler on tall pole on left.
0.01l20 mule fatBaccharis salicifolia / 16
0.01l21?foothill needlegrassNassella lepida / 3
0.01 22 wild-cucumberMarah macrocarpus var. macrocarpus / 12
0.01 23 laurel sumacMalosma laurina / 15
0.01 24 California buckwheatEriogonum fasciculatum var. foliolosum / 20
0.01   Another sprinkler on left.
0.01 25 western sycamorePlatanus racemosa / 9
0.02l26 white sageSalvia apiana / 15
0.02   Third sprinkler almost hidden in bushes.
0.02l27 *wand mulleinVerbascum virgatum / 2
0.02   Fourth sprinkler; future ones not noted.11
0.02l28 California wild roseRosa californica+ / 4
0.02l29 *greater periwinkleVinca major / 3
0.02r30 *giant reedArundo donax / 4
0.02r31 black cottonwoodPopulus balsamifera ssp. trichocarpa / 6
0.02r32 California enceliaEncelia californica+ / 6
0.03 33 scale-broomLepidospartum squamatum / 2
0.03r34 *shortpod mustardHirschfeldia incana / 17
0.03 35spwild oatsAvena sp. /  
0.03 36 *tocaloteCentaurea melitensis / 17
0.04r37 California coffeeberryRhamnus californica ssp. californica / 6
0.04 38sspdeerweedLotus scoparius var. scoparius / 10
0.04 39 creek senecioSenecio flaccidus var. douglasii / 5
0.04l40 Vasey's prickly pearOpuntia Xvaseyi+ / 5
0.05 41 *smilo grassPiptatherum miliaceum1 / 19
0.05l42 *jade plantCrassula ovata / 1
0.05 43 southern honeysuckleLonicera subspicata var. denudata / 16
0.05l44spwhite nightshadeSolanum douglasii1 / 15
0.05l45spaloe with spots on the leaf surfaces.
0.05 46 California dodderCuscuta californica var. californica / 7
0.06 47 Blocked-off trail on left; turn right down boulders at the poles and wires.
0.06 48 T-junction with another trail; go left.
0.07r49 *narrowleaf filagoFilago gallica / 9
0.07 50 chaparral yuccaYucca whipplei ssp. parishii / 7
0.07r51 *Mediterranean pygmy-weedCrassula tillaea / 2
0.07r52 pygmy-weedCrassula connata / 3
  53 *redstem filareeErodium cicutarium / 11
0.08 54 *Spanish broomSpartium junceum / 3
0.09 55 black sageSalvia mellifera / 17
0.09r56 chaparral whitethornCeanothus leucodermis / 9
 r57 *Australian brass-buttonsCotula australis / 5
0.10 58spEucalyptus sp. (infl a panicle of umbels, 3-7 fl'd, fr 5 mm on 1 mm pedicel, the 3-4 valves included; lerp-free.)
0.11   (goldback fern, Pentagramma triangularis, at base of bank on right.)
0.11 59 *ripgut bromeBromus diandrus / 17
0.11   (Mountain mahogany, Cercocarpus betuloides var. betuloides on left.)
0.15   End of the large boulders on left used to armor the bank below the houses.11
0.15   Old terrace bank on left with following 4 species:
0.15l60 goldback fernPentagramma triangularis ssp. triangularis / 6
0.15l61 lanceleaf dudleyaDudleya lanceolata / 9
0.15l62 Bigelow's spike-mossSelaginella bigelovii / 8
0.15l63 coffee fernPellaea andromedifolia / 6
0.16 64sspyellow pincushionChaenactis glabriuscula var. glabriuscula+ / 7
  65 *smooth cat's earHypochaeris glabra+ / 6
0.17   Careful of the barbed wire around the next species!
0.17 66 hoaryleaf ceanothusCeanothus crassifolius / 7
0.17 67~coast prickly-pearOpuntia littoralis / 5
0.17 68sppeppergrassLepidium either nidens or virginicum, but not oblongum. /  
0.17 69 bittercressCardamine oligosperma / 2
 r70 California suncupCamissonia bistorta / 1
0.17   Jct. with trail on left, then another trail on right.
  71 small-flowered evening-primroseCamissonia micrantha+ / 1
  72sspblue dicksDichelostemma capitatum ssp. capitatum+ / 8
  73 muillaMuilla maritima+ / 4
  74 prickly cryptanthaCryptantha muricata+ / 6
  75 Bishop's lotusLotus strigosus+ / 5
  76sspminer's lettuceClaytonia perfoliata+ / 3
  77 *common chickweedStellaria media+ / 3
0.18   Jct. with trail on left.
0.18l78 blue elderberrySambucus mexicana / 18
0.19   Jct. with trail on left.
0.19r79 hollyleaf redberryRhamnus ilicifolia / 17
0.19l80 hollyleaf cherryPrunus ilicifolia ssp. ilicifolia / 4
0.21   Note on the opposite bank, a cut with a line of old double beam supports for something no longer present. (A flume?)
0.21 81 bird's-foot fernPellaea mucronata var. mucronata / 12
0.21   Four-way junction with Midwick Trail on left, and its continuation to cross the riverbed on the right. Continue straight.
0.22 82 white everlastingGnaphalium canescens ssp. microcephalum / 16
0.23 83speverlasting nest-strawStylocline gnaphaloides / 1
  84 winged pectocaryaPectocarya penicillata / 1
0.25   Fence with hanging fence post, which wasn't put in that way, on left. Many prickly pear on right.
0.27r85 Nevin's brickelliaBrickellia nevinii / 1
0.27   Jct. with path on right.
0.29   Jct. with path on left.
0.29   Y-junction; go left and up.
0.30   T-junction on the terrace; go right between two large yuccas and try not to get stabbed.
0.31   Unusual seriously-fenced small structure on left, with air vents and no identification.
  86 leather spineflowerLastarriaea coriacea / 1
  87 *four-leaf polycarpPolycarpon tetraphyllum / 2
0.32   Jct. with path on right.
0.33   Jct. with path on right.
0.34   Prickly pear, Opuntia xVaseyi, with a definite id from the flowers.
0.34r88 sugar bushRhus ovata / 13
0.36   Jct. with path on left.
0.37l89 *mission cactusOpuntia ficus-indica / 2
0.38l90spash #1 (lvs with 7 serrate, acute tip leaflets)Fraxinus sp. #1 /  
0.38   Trail bends left (don't take drainage continuing in front of you).
0.40r91 arroyo willowSalix lasiolepis / 16
0.42   Trail turns left at the sycamore (don't take drainage continuing in front of you).
0.42 92 long-stemmed buckwheatEriogonum elongatum var. elongatum / 7
0.43 93spclarkiaClarkia sp. /  
  94?sunflower seedling?Helianthus annuus? /  
  95 *Bermuda buttercupOxalis pes-caprae / 3
0.44 96 *eupatoryAgeratina adenophora / 2
0.44 97 *tree tobaccoNicotiana glauca / 7
0.44 98 black willowSalix gooddingii / 4
0.44 99 *castor beanRicinus communis / 6
0.44   Trail is overgrown here with smilo grass.
0.44 100 bush monkeyflowerMimulus aurantiacus / 18
0.45r101sp Setaria sp. /  
0.45l102 chasmantheChasmanthe floribunda /  
0.45 103 *Crete weedHedypnois cretica / 4
0.45r104 California poppyEschscholzia californica / 8
0.47 105 California bayUmbellularia californica / 3
0.48l106 *kikuyu grassPennisetum clandestinum / 1
0.50l107?ash #2 (lvs with 11 lflets, tip acuminate)Fraxinus sp. #2 /  
0.50   Trail ends at pond from the drainage outfall. The following taxa are found at the pond.
0.50 108 *Mexican Fan PalmWashingtonia robusta / 1
0.50 109 *upright veldt grassEhrharta erecta / 1
0.50 110 *mouse-ear chickweedCerastium glomeratum / 3
0.50   (Umbrella sedge plus other sedges(?) across pond on left)

Comments On Specific Species

Species #48, 49, 54-62. The order is uncertain for these species, which occur somewhere between mile 0.17 and mile 0.21.

Opuntia Xvaseyi. The id for the specimen at mile 0.04 comes from the specimen at mile 0.34.

Rosa californica and Encelia californica. These species, while native to Southern California, are not native to Eaton Canyon, and have been planted here.


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Copyright © 2002-2003 by Jane Strong and Tom Chester.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
http://tchester.org/sgm/plants/guides/west_bank_trail.html
Comments and feedback: Jane Strong | Tom Chester
Updated 20 April 2003.