Plant Guide to Mt. Wilson Toll Road / Horse Trail Loop

Miles#id?Common NameLatin Name#here#all
0.00   Begin plant guide immediately after passing through gate at Pinecrest Drive; elevation 1320 feet.
0.00r1 mule fatBaccharis salicifolia5 / 228
0.00r2 wild-cucumberMarah macrocarpus var. macrocarpus5 / 234
0.00r3 *smilo grassPiptatherum miliaceum50 / 916
0.00r4 California sagebrushArtemisia californica / 32
0.00r5 *ripgut bromeBromus diandrus / 34
0.00r6 branching phaceliaPhacelia ramosissima var. latifolia20 / 523
0.00r7 *shortpod mustardHirschfeldia incana50 / 938
0.00r8 *Oriental mustardSisymbrium orientale / 7
0.00r9 *white goosefootChenopodium album20 / 211
0.00r10 bur-ragweedAmbrosia acanthicarpa20 / 413
0.00r11 *foxtail barleyHordeum murinum+99 / 93
0.00r12 *redstem filareeErodium cicutarium50 / 532
0.00r13 California buckwheatEriogonum fasciculatum var. foliolosum30 / 538
0.00r14 lanceleaf dudleyaDudleya lanceolata30 / 316
0.00r15 coast live oakQuercus agrifolia var. agrifolia3 / 331
0.00l16 short-leaved cliff-asterMalacothrix saxatilis var. tenuifolia20 / 59
0.01l17 *tree tobaccoNicotiana glauca20 / 515
0.01l18 short-winged deerweedLotus scoparius var. brevialatus+20 / 513
0.01l19 California brickellbushBrickellia californica20 / 523
0.01r20 *slender wild oatsAvena barbata / 19
0.01l21 white everlastingGnaphalium canescens ssp. microcephalum20 / 530
0.01l22 golden yarrowEriophyllum confertiflorum var. confertiflorum20 / 540
0.01l23 bush monkeyflowerMimulus aurantiacus20 / 531
0.01r24 *windmill pinkSilene gallica20 / 521
0.01b25 eucryptaEucrypta chrysanthemifolia var. chrysanthemifolia / 15
0.01r26 long-stemmed buckwheatEriogonum elongatum var. elongatum20 / 517
0.01r27 laurel sumacMalosma laurina3 / 329
0.01l28~blue dicksDichelostemma capitatum ssp. capitatum+ / 28
 l29 Bigelow's spike-mossSelaginella bigelovii20 / 513
0.02l30 narrowleaf bedstrawGalium angustifolium ssp. angustifolium10 / 339
 l31 common bedstrawGalium aparine30 / 520
 l32 prickly cryptanthaCryptantha muricata / 13
 l33 coffee fernPellaea andromedifolia5 / 217
 l34 Robinson's pepper-grassLepidium virginicum var. robinsonii30 / 32
 l35 wild sweetpeaLathyrus vestitus var. vestitus5 / 17
 l36 *common chickweedStellaria media30 / 516
 l37 California polypodyPolypodium californicum20 / 312
 r38 *castor beanRicinus communis20 / 512
 l39 small-flowered melicaMelica imperfecta / 25
 l40 leafy daisyErigeron foliosus var. foliosus / 29
 l41 *sow thistleSonchus oleraceus / 21
 l42 scarlet larkspurDelphinium cardinale5 / 13
 l43 bicolored everlastingGnaphalium bicolor10 / 320
 l44 southern Indian pinkSilene laciniata ssp. major10 / 211
 l  liverworts
 l45sp*rose cloverTrifolium hirtum / 5
 l46 California everlastingGnaphalium californicum2 / 124
 r47 *petty spurgeEuphorbia peplus / 6
 l48~globe giliaGilia capitata ssp. abrotanifolia10 / 14
 l49 California chicoryRafinesquia californica / 14
0.07   Road turns right at drainage. Plants downhill are mostly weedy non-natives; plants uphill are mostly native.
 r50 giant wild ryeLeymus condensatus5 / 122
 l51 California suncupCamissonia californica / 13
 l52 wild canterbury bellsPhacelia minor / 12
 l53 chiaSalvia columbariae30 / 517
 l54 white sageSalvia apiana20 / 527
 l55 *goldentopLamarckia aurea / 11
 l56 California dodderCuscuta californica var. californica / 12
 l  San Gabriel thrust fault exposed; look for bedrock on top of alluvium!
 l57 *Spanish broomSpartium junceum5 / 27
 r58 *narrowleaf filagoFilago gallica / 29
 l59 *red bromeBromus madritensis ssp. rubens / 35
 l60 *hairy rattail fescueVulpia myuros var. hirsuta / 9
 l61 *tocaloteCentaurea melitensis5 / 132
 l62 *common groundselSenecio vulgaris3 / 111
0.13l  Jct. Altadena Crest Trail
 r63 Coulter's lupineLupinus sparsiflorus30 / 57
 l64 *Jerusalem oakChenopodium botrys5 / 13
 l65 chaparral yuccaYucca whipplei3 / 320
 l66 San Bernardino sun-cupCamissonia confusa / 1
 r67 *giant reedArundo donax5 / 27
    (bird's-foot fern, Pellaea mucronata var. mucronata)
 l67 Vasey's prickly pearOpuntia Xvaseyi1 / 115
 l68~popcorn flowerCryptantha intermedia / 18
0.15   Beginning of bridge over Eaton Wash; elevation 1240 feet.
 b69 white alderAlnus rhombifolia3 / 19
0.16   End bridge
 l  Check for Nevin's brickellia, Brickellia nevinii.
0.16r  Jct. Eaton Canyon Park Main Road; continue straight on Toll Road.
 l70 California fuchsiaEpilobium canum ssp. canum / 11
 r71sp*Cypress sp.Cupressus sp.+ / 1 
 l72sspthick-leaved yerba santaEriodictyon crassifolium / 2
 r73 dwarf lupineLupinus bicolor / 17
 l74 California poppyEschscholzia californica / 20
 l75 creek senecioSenecio flaccidus var. douglasii / 9
 l76 *bermuda grassCynodon dactylon / 15
 l77 collar lupineLupinus truncatus / 16
 r78 *smooth cat's earHypochaeris glabra / 21
 r79 birch-leaf mountain-mahoganyCercocarpus betuloides var. betuloides / 14
 r80 annual sunflowerHelianthus annuus / 8
 r81sp*planted 3 needle (Jeffrey?) pinePinus sp.+ /  
 r82 *Valley oakQuercus lobata+ / 11
 r  Large drain on ridgeline.
 r83 *black locustRobinia pseudoacacia+ / 16
0.43   Cross drainage
 l  Best field of Coulter's lupine, Lupinus sparsiflorus.
 r  Road drain.
 l84 pygmy-weedCrassula connata / 11
 r  Turnout.
 r85 Acton's enceliaEncelia actoni / 1
 r  Road drain.
 r  Turnout.
 r86 *Australian pineCasuarina equisetifolia+ / 1
 r  Sign with Bicycle Rules
 l87 black sageSalvia mellifera / 29
 r  Road drain.
 r88 *California burcloverMedicago polymorpha / 26
 l  (Giant needlegrass, Achnatherum coronatum)
 l89 white nightshadeSolanum douglasii / 12
    Cross weird drainage.
 l90 red-gland spurgeChamaesyce melanadenia / 8
 r91 stinging lupineLupinus hirsutissimus / 11
 r  Small drain.
 l92 *fountain grassPennisetum setaceum / 8
0.62   Cross drainage with interesting alcove / dry waterfall on left.
 l93 hollyleaf redberryRhamnus ilicifolia / 31
0.85   Cross large drainage with a flat-topped low retaining wall, good for sitting on.
 l94 bittercressCardamine oligosperma / 5
 l95 threadstemPterostegia drymarioides / 14
 l96 narrow-leaved miner's lettuceClaytonia parviflora ssp. parviflora / 8
 l97 miner's lettuceClaytonia perfoliata ssp. perfoliata / 12
 l98 hollyleaf cherryPrunus ilicifolia ssp. ilicifolia / 9
 l99 heartleaf penstemonKeckiella cordifolia / 19
 r100 poison oakToxicodendron diversilobum / 29
 r101 toyonHeteromeles arbutifolia / 35
 l102 goldback fernPentagramma triangularis ssp. triangularis / 12
 l103 California lace fernAspidotis californica / 4
 l104 woolly Indian paintbrushCastilleja foliolosa / 1
0.98r  Jct. Horse Trail down to lower Eaton Canyon; take it; elevation 1635 feet.
 l105 south coast morning-gloryCalystegia macrostegia ssp. intermedia / 12
 l106 sugar bushRhus ovata / 19
 r107?the unknown ~agave mystery plant from sunset ridge
 l  Firecracker Plantation, where the 1993 fire was started by a transient.
 l  (Unk. pine tree, not P. halapensis)
 r108 *oliveOlea europaea / 8
 r109 saw-toothed goldenbushHazardia squarrosa var. grindelioides / 26
 l110 Bigelow's coreopsisCoreopsis bigelovii / 1
 r111 San Gabriel Mtns. leather oakQuercus durata var. gabrielensis / 3
 b112 chamiseAdenostoma fasciculatum / 27
 r113 *Russian thistleSalsola tragus / 22
 r114 bristly goldenasterHeterotheca sessiliflora ssp. echioides / 5
 r  (blue elderberry, Sambucus mexicana)
 l115?Helianthus gracilentus?
 l116 Engelmann leather oak hybridQuercus durata var. gabrielensis X Q. engelmannii / 2
 r117 blue elderberrySambucus mexicana / 34
 r  (Check for possible Quercus durata X Q. berberidifolia.)
 l118 Southern California black walnutJuglans californica var. californica / 3
 l119 *blue gumEucalyptus globulus / 4
 r120 California coffeeberryRhamnus californica ssp. californica / 12
1.49   End guide at jct. with Main Eaton Canyon Road; elevation 1080 feet.
http://tchester.org/sgm/plants/guides/mw_toll_road_loop.html
Updated 25 February 2006.