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

Mile s # id? Common Name Latin Name #here #all
0.00 Begin plant guide immediately after passing through gate at Pinecrest Drive; elevation 1320 feet.
0.00 r 1 mule fat Baccharis salicifolia 5 / 2 28
0.00 r 2 wild-cucumber Marah macrocarpus var. macrocarpus 5 / 2 34
0.00 r 3 *smilo grass Piptatherum miliaceum 50 / 9 16
0.00 r 4 California sagebrush Artemisia californica / 32
0.00 r 5 *ripgut brome Bromus diandrus / 34
0.00 r 6 branching phacelia Phacelia ramosissima var. latifolia 20 / 5 23
0.00 r 7 *shortpod mustard Hirschfeldia incana 50 / 9 38
0.00 r 8 *Oriental mustard Sisymbrium orientale / 7
0.00 r 9 *white goosefoot Chenopodium album 20 / 2 11
0.00 r 10 bur-ragweed Ambrosia acanthicarpa 20 / 4 13
0.00 r 11 *foxtail barley Hordeum murinum⁺ 99 / 9 3
0.00 r 12 *redstem filaree Erodium cicutarium 50 / 5 32
0.00 r 13 California buckwheat Eriogonum fasciculatum var. foliolosum 30 / 5 38
0.00 r 14 lanceleaf dudleya Dudleya lanceolata 30 / 3 16
0.00 r 15 coast live oak Quercus agrifolia var. agrifolia 3 / 3 31
0.00 l 16 short-leaved cliff-aster Malacothrix saxatilis var. tenuifolia 20 / 5 9
0.01 l 17 *tree tobacco Nicotiana glauca 20 / 5 15
0.01 l 18 short-winged deerweed Lotus scoparius var. brevialatus⁺ 20 / 5 13
0.01 l 19 California brickellbush Brickellia californica 20 / 5 23
0.01 r 20 *slender wild oats Avena barbata / 19
0.01 l 21 white everlasting Gnaphalium canescens ssp. microcephalum 20 / 5 30
0.01 l 22 golden yarrow Eriophyllum confertiflorum var. confertiflorum 20 / 5 40
0.01 l 23 bush monkeyflower Mimulus aurantiacus 20 / 5 31
0.01 r 24 *windmill pink Silene gallica 20 / 5 21
0.01 b 25 eucrypta Eucrypta chrysanthemifolia var. chrysanthemifolia / 15
0.01 r 26 long-stemmed buckwheat Eriogonum elongatum var. elongatum 20 / 5 17
0.01 r 27 laurel sumac Malosma laurina 3 / 3 29
0.01 l 28 ~ blue dicks Dichelostemma capitatum ssp. capitatum⁺ / 28
l 29 Bigelow's spike-moss Selaginella bigelovii 20 / 5 13
0.02 l 30 narrowleaf bedstraw Galium angustifolium ssp. angustifolium 10 / 3 39
l 31 common bedstraw Galium aparine 30 / 5 20
l 32 prickly cryptantha Cryptantha muricata / 13
l 33 coffee fern Pellaea andromedifolia 5 / 2 17
l 34 Robinson's pepper-grass Lepidium virginicum var. robinsonii 30 / 3 2
l 35 wild sweetpea Lathyrus vestitus var. vestitus 5 / 1 7
l 36 *common chickweed Stellaria media 30 / 5 16
l 37 California polypody Polypodium californicum 20 / 3 12
r 38 *castor bean Ricinus communis 20 / 5 12
l 39 small-flowered melica Melica imperfecta / 25
l 40 leafy daisy Erigeron foliosus var. foliosus / 29
l 41 *sow thistle Sonchus oleraceus / 21
l 42 scarlet larkspur Delphinium cardinale 5 / 1 3
l 43 bicolored everlasting Gnaphalium bicolor 10 / 3 20
l 44 southern Indian pink Silene laciniata ssp. major 10 / 2 11
l liverworts
l 45 sp *rose clover Trifolium hirtum / 5
l 46 California everlasting Gnaphalium californicum 2 / 1 24
r 47 *petty spurge Euphorbia peplus / 6
l 48 ~ globe gilia Gilia capitata ssp. abrotanifolia 10 / 1 4
l 49 California chicory Rafinesquia californica / 14
0.07 Road turns right at drainage. Plants downhill are mostly weedy non-natives; plants uphill are mostly native.
r 50 giant wild rye Leymus condensatus 5 / 1 22
l 51 California suncup Camissonia californica / 13
l 52 wild canterbury bells Phacelia minor / 12
l 53 chia Salvia columbariae 30 / 5 17
l 54 white sage Salvia apiana 20 / 5 27
l 55 *goldentop Lamarckia aurea / 11
l 56 California dodder Cuscuta californica var. californica / 12
l San Gabriel thrust fault exposed; look for bedrock on top of alluvium!
l 57 *Spanish broom Spartium junceum 5 / 2 7
r 58 *narrowleaf filago Filago gallica / 29
l 59 *red brome Bromus madritensis ssp. rubens / 35
l 60 *hairy rattail fescue Vulpia myuros var. hirsuta / 9
l 61 *tocalote Centaurea melitensis 5 / 1 32
l 62 *common groundsel Senecio vulgaris 3 / 1 11
0.13 l Jct. Altadena Crest Trail
r 63 Coulter's lupine Lupinus sparsiflorus 30 / 5 7
l 64 *Jerusalem oak Chenopodium botrys 5 / 1 3
l 65 chaparral yucca Yucca whipplei 3 / 3 20
l 66 San Bernardino sun-cup Camissonia confusa / 1
r 67 *giant reed Arundo donax 5 / 2 7
(bird's-foot fern, Pellaea mucronata var. mucronata)
l 67 Vasey's prickly pear Opuntia Xvaseyi 1 / 1 15
l 68 ~ popcorn flower Cryptantha intermedia / 18
0.15 Beginning of bridge over Eaton Wash; elevation 1240 feet.
b 69 white alder Alnus rhombifolia 3 / 1 9
0.16 End bridge
l Check for Nevin's brickellia, Brickellia nevinii.
0.16 r Jct. Eaton Canyon Park Main Road; continue straight on Toll Road.
l 70 California fuchsia Epilobium canum ssp. canum / 11
r 71 sp *Cypress sp. Cupressus sp.⁺ / 1
l 72 ssp thick-leaved yerba santa Eriodictyon crassifolium / 2
r 73 dwarf lupine Lupinus bicolor / 17
l 74 California poppy Eschscholzia californica / 20
l 75 creek senecio Senecio flaccidus var. douglasii / 9
l 76 *bermuda grass Cynodon dactylon / 15
l 77 collar lupine Lupinus truncatus / 16
r 78 *smooth cat's ear Hypochaeris glabra / 21
r 79 birch-leaf mountain-mahogany Cercocarpus betuloides var. betuloides / 14
r 80 annual sunflower Helianthus annuus / 8
r 81 sp *planted 3 needle (Jeffrey?) pine Pinus sp.⁺ /
r 82 *Valley oak Quercus lobata⁺ / 1 1
r Large drain on ridgeline.
r 83 *black locust Robinia pseudoacacia⁺ / 1 6
0.43 Cross drainage
l Best field of Coulter's lupine, Lupinus sparsiflorus.
r Road drain.
l 84 pygmy-weed Crassula connata / 11
r Turnout.
r 85 Acton's encelia Encelia actoni / 1
r Road drain.
r Turnout.
r 86 *Australian pine Casuarina equisetifolia⁺ / 1
r Sign with Bicycle Rules
l 87 black sage Salvia mellifera / 29
r Road drain.
r 88 *California burclover Medicago polymorpha / 26
l (Giant needlegrass, Achnatherum coronatum)
l 89 white nightshade Solanum douglasii / 12
Cross weird drainage.
l 90 red-gland spurge Chamaesyce melanadenia / 8
r 91 stinging lupine Lupinus hirsutissimus / 11
r Small drain.
l 92 *fountain grass Pennisetum setaceum / 8
0.62 Cross drainage with interesting alcove / dry waterfall on left.
l 93 hollyleaf redberry Rhamnus ilicifolia / 31
0.85 Cross large drainage with a flat-topped low retaining wall, good for sitting on.
l 94 bittercress Cardamine oligosperma / 5
l 95 threadstem Pterostegia drymarioides / 14
l 96 narrow-leaved miner's lettuce Claytonia parviflora ssp. parviflora / 8
l 97 miner's lettuce Claytonia perfoliata ssp. perfoliata / 12
l 98 hollyleaf cherry Prunus ilicifolia ssp. ilicifolia / 9
l 99 heartleaf penstemon Keckiella cordifolia / 19
r 100 poison oak Toxicodendron diversilobum / 29
r 101 toyon Heteromeles arbutifolia / 35
l 102 goldback fern Pentagramma triangularis ssp. triangularis / 12
l 103 California lace fern Aspidotis californica / 4
l 104 woolly Indian paintbrush Castilleja foliolosa / 1
0.98 r Jct. Horse Trail down to lower Eaton Canyon; take it; elevation 1635 feet.
l 105 south coast morning-glory Calystegia macrostegia ssp. intermedia / 12
l 106 sugar bush Rhus ovata / 19
r 107 ? 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)
r 108 *olive Olea europaea / 8
r 109 saw-toothed goldenbush Hazardia squarrosa var. grindelioides / 26
l 110 Bigelow's coreopsis Coreopsis bigelovii / 1
r 111 San Gabriel Mtns. leather oak Quercus durata var. gabrielensis / 3
b 112 chamise Adenostoma fasciculatum / 27
r 113 *Russian thistle Salsola tragus / 22
r 114 bristly goldenaster Heterotheca sessiliflora ssp. echioides / 5
r (blue elderberry, Sambucus mexicana)
l 115 ? Helianthus gracilentus?
l 116 Engelmann leather oak hybrid Quercus durata var. gabrielensis X Q. engelmannii / 2
r 117 blue elderberry Sambucus mexicana / 34
r (Check for possible Quercus durata X Q. berberidifolia.)
l 118 Southern California black walnut Juglans californica var. californica / 3
l 119 *blue gum Eucalyptus globulus / 4
r 120 California coffeeberry Rhamnus 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.

Mile	s	#	id?	Common Name	Latin Name	#here	#all
0.00				Begin plant guide immediately after passing through gate at Pinecrest Drive; elevation 1320 feet.
0.00	r	1		mule fat	Baccharis salicifolia	5 / 2	28
0.00	r	2		wild-cucumber	Marah macrocarpus var. macrocarpus	5 / 2	34
0.00	r	3		*smilo grass	Piptatherum miliaceum	50 / 9	16
0.00	r	4		California sagebrush	Artemisia californica	/	32
0.00	r	5		*ripgut brome	Bromus diandrus	/	34
0.00	r	6		branching phacelia	Phacelia ramosissima var. latifolia	20 / 5	23
0.00	r	7		*shortpod mustard	Hirschfeldia incana	50 / 9	38
0.00	r	8		*Oriental mustard	Sisymbrium orientale	/	7
0.00	r	9		*white goosefoot	Chenopodium album	20 / 2	11
0.00	r	10		bur-ragweed	Ambrosia acanthicarpa	20 / 4	13
0.00	r	11		*foxtail barley	Hordeum murinum⁺	99 / 9	3
0.00	r	12		*redstem filaree	Erodium cicutarium	50 / 5	32
0.00	r	13		California buckwheat	Eriogonum fasciculatum var. foliolosum	30 / 5	38
0.00	r	14		lanceleaf dudleya	Dudleya lanceolata	30 / 3	16
0.00	r	15		coast live oak	Quercus agrifolia var. agrifolia	3 / 3	31
0.00	l	16		short-leaved cliff-aster	Malacothrix saxatilis var. tenuifolia	20 / 5	9
0.01	l	17		*tree tobacco	Nicotiana glauca	20 / 5	15
0.01	l	18		short-winged deerweed	Lotus scoparius var. brevialatus⁺	20 / 5	13
0.01	l	19		California brickellbush	Brickellia californica	20 / 5	23
0.01	r	20		*slender wild oats	Avena barbata	/	19
0.01	l	21		white everlasting	Gnaphalium canescens ssp. microcephalum	20 / 5	30
0.01	l	22		golden yarrow	Eriophyllum confertiflorum var. confertiflorum	20 / 5	40
0.01	l	23		bush monkeyflower	Mimulus aurantiacus	20 / 5	31
0.01	r	24		*windmill pink	Silene gallica	20 / 5	21
0.01	b	25		eucrypta	Eucrypta chrysanthemifolia var. chrysanthemifolia	/	15
0.01	r	26		long-stemmed buckwheat	Eriogonum elongatum var. elongatum	20 / 5	17
0.01	r	27		laurel sumac	Malosma laurina	3 / 3	29
0.01	l	28	~	blue dicks	Dichelostemma capitatum ssp. capitatum⁺	/	28
	l	29		Bigelow's spike-moss	Selaginella bigelovii	20 / 5	13
0.02	l	30		narrowleaf bedstraw	Galium angustifolium ssp. angustifolium	10 / 3	39
	l	31		common bedstraw	Galium aparine	30 / 5	20
	l	32		prickly cryptantha	Cryptantha muricata	/	13
	l	33		coffee fern	Pellaea andromedifolia	5 / 2	17
	l	34		Robinson's pepper-grass	Lepidium virginicum var. robinsonii	30 / 3	2
	l	35		wild sweetpea	Lathyrus vestitus var. vestitus	5 / 1	7
	l	36		*common chickweed	Stellaria media	30 / 5	16
	l	37		California polypody	Polypodium californicum	20 / 3	12
	r	38		*castor bean	Ricinus communis	20 / 5	12
	l	39		small-flowered melica	Melica imperfecta	/	25
	l	40		leafy daisy	Erigeron foliosus var. foliosus	/	29
	l	41		*sow thistle	Sonchus oleraceus	/	21
	l	42		scarlet larkspur	Delphinium cardinale	5 / 1	3
	l	43		bicolored everlasting	Gnaphalium bicolor	10 / 3	20
	l	44		southern Indian pink	Silene laciniata ssp. major	10 / 2	11
	l			liverworts
	l	45	sp	*rose clover	Trifolium hirtum	/	5
	l	46		California everlasting	Gnaphalium californicum	2 / 1	24
	r	47		*petty spurge	Euphorbia peplus	/	6
	l	48	~	globe gilia	Gilia capitata ssp. abrotanifolia	10 / 1	4
	l	49		California chicory	Rafinesquia californica	/	14
0.07				Road turns right at drainage. Plants downhill are mostly weedy non-natives; plants uphill are mostly native.
	r	50		giant wild rye	Leymus condensatus	5 / 1	22
	l	51		California suncup	Camissonia californica	/	13
	l	52		wild canterbury bells	Phacelia minor	/	12
	l	53		chia	Salvia columbariae	30 / 5	17
	l	54		white sage	Salvia apiana	20 / 5	27
	l	55		*goldentop	Lamarckia aurea	/	11
	l	56		California dodder	Cuscuta californica var. californica	/	12
	l			San Gabriel thrust fault exposed; look for bedrock on top of alluvium!
	l	57		*Spanish broom	Spartium junceum	5 / 2	7
	r	58		*narrowleaf filago	Filago gallica	/	29
	l	59		*red brome	Bromus madritensis ssp. rubens	/	35
	l	60		*hairy rattail fescue	Vulpia myuros var. hirsuta	/	9
	l	61		*tocalote	Centaurea melitensis	5 / 1	32
	l	62		*common groundsel	Senecio vulgaris	3 / 1	11
0.13	l			Jct. Altadena Crest Trail
	r	63		Coulter's lupine	Lupinus sparsiflorus	30 / 5	7
	l	64		*Jerusalem oak	Chenopodium botrys	5 / 1	3
	l	65		chaparral yucca	Yucca whipplei	3 / 3	20
	l	66		San Bernardino sun-cup	Camissonia confusa	/	1
	r	67		*giant reed	Arundo donax	5 / 2	7
				(bird's-foot fern, Pellaea mucronata var. mucronata)
	l	67		Vasey's prickly pear	Opuntia Xvaseyi	1 / 1	15
	l	68	~	popcorn flower	Cryptantha intermedia	/	18
0.15				Beginning of bridge over Eaton Wash; elevation 1240 feet.
	b	69		white alder	Alnus rhombifolia	3 / 1	9
0.16				End bridge
	l			Check for Nevin's brickellia, Brickellia nevinii.
0.16	r			Jct. Eaton Canyon Park Main Road; continue straight on Toll Road.
	l	70		California fuchsia	Epilobium canum ssp. canum	/	11
	r	71	sp	*Cypress sp.	Cupressus sp.⁺	/ 1
	l	72	ssp	thick-leaved yerba santa	Eriodictyon crassifolium	/	2
	r	73		dwarf lupine	Lupinus bicolor	/	17
	l	74		California poppy	Eschscholzia californica	/	20
	l	75		creek senecio	Senecio flaccidus var. douglasii	/	9
	l	76		*bermuda grass	Cynodon dactylon	/	15
	l	77		collar lupine	Lupinus truncatus	/	16
	r	78		*smooth cat's ear	Hypochaeris glabra	/	21
	r	79		birch-leaf mountain-mahogany	Cercocarpus betuloides var. betuloides	/	14
	r	80		annual sunflower	Helianthus annuus	/	8
	r	81	sp	*planted 3 needle (Jeffrey?) pine	Pinus sp.⁺	/
	r	82		*Valley oak	Quercus lobata⁺	/ 1	1
	r			Large drain on ridgeline.
	r	83		*black locust	Robinia pseudoacacia⁺	/ 1	6
0.43				Cross drainage
	l			Best field of Coulter's lupine, Lupinus sparsiflorus.
	r			Road drain.
	l	84		pygmy-weed	Crassula connata	/	11
	r			Turnout.
	r	85		Acton's encelia	Encelia actoni	/	1
	r			Road drain.
	r			Turnout.
	r	86		*Australian pine	Casuarina equisetifolia⁺	/	1
	r			Sign with Bicycle Rules
	l	87		black sage	Salvia mellifera	/	29
	r			Road drain.
	r	88		*California burclover	Medicago polymorpha	/	26
	l			(Giant needlegrass, Achnatherum coronatum)
	l	89		white nightshade	Solanum douglasii	/	12
				Cross weird drainage.
	l	90		red-gland spurge	Chamaesyce melanadenia	/	8
	r	91		stinging lupine	Lupinus hirsutissimus	/	11
	r			Small drain.
	l	92		*fountain grass	Pennisetum setaceum	/	8
0.62				Cross drainage with interesting alcove / dry waterfall on left.
	l	93		hollyleaf redberry	Rhamnus ilicifolia	/	31
0.85				Cross large drainage with a flat-topped low retaining wall, good for sitting on.
	l	94		bittercress	Cardamine oligosperma	/	5
	l	95		threadstem	Pterostegia drymarioides	/	14
	l	96		narrow-leaved miner's lettuce	Claytonia parviflora ssp. parviflora	/	8
	l	97		miner's lettuce	Claytonia perfoliata ssp. perfoliata	/	12
	l	98		hollyleaf cherry	Prunus ilicifolia ssp. ilicifolia	/	9
	l	99		heartleaf penstemon	Keckiella cordifolia	/	19
	r	100		poison oak	Toxicodendron diversilobum	/	29
	r	101		toyon	Heteromeles arbutifolia	/	35
	l	102		goldback fern	Pentagramma triangularis ssp. triangularis	/	12
	l	103		California lace fern	Aspidotis californica	/	4
	l	104		woolly Indian paintbrush	Castilleja foliolosa	/	1
0.98	r			Jct. Horse Trail down to lower Eaton Canyon; take it; elevation 1635 feet.
	l	105		south coast morning-glory	Calystegia macrostegia ssp. intermedia	/	12
	l	106		sugar bush	Rhus ovata	/	19
	r	107	?	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)
	r	108		*olive	Olea europaea	/	8
	r	109		saw-toothed goldenbush	Hazardia squarrosa var. grindelioides	/	26
	l	110		Bigelow's coreopsis	Coreopsis bigelovii	/	1
	r	111		San Gabriel Mtns. leather oak	Quercus durata var. gabrielensis	/	3
	b	112		chamise	Adenostoma fasciculatum	/	27
	r	113		*Russian thistle	Salsola tragus	/	22
	r	114		bristly goldenaster	Heterotheca sessiliflora ssp. echioides	/	5
	r			(blue elderberry, Sambucus mexicana)
	l	115	?	Helianthus gracilentus?
	l	116		Engelmann leather oak hybrid	Quercus durata var. gabrielensis X Q. engelmannii	/	2
	r	117		blue elderberry	Sambucus mexicana	/	34
	r			(Check for possible Quercus durata X Q. berberidifolia.)
	l	118		Southern California black walnut	Juglans californica var. californica	/	3
	l	119		*blue gum	Eucalyptus globulus	/	4
	r	120		California coffeeberry	Rhamnus californica ssp. californica	/	12
1.49				End guide at jct. with Main Eaton Canyon Road; elevation 1080 feet.