Plant Guide to Colby Trail, Glendora, San Gabriel Mountains

Mile	s	#	id?	Common Name	Latin Name	#here	#all
0.00				Begin trail at the northern end of Loraine Avenue in Glendora.
0.00	c	1		*white goosefoot	Chenopodium album	/	13
0.00	b	2		*foxtail barley	Hordeum murinum ssp. glaucum	/	7
0.00	l	3		*ripgut brome	Bromus diandrus	/	37
0.00	l	4		common bedstraw	Galium aparine	/	23
0.00	r	5		*horehound	Marrubium vulgare	/	21
0.00	r	6		*prickly lettuce	Lactuca serriola	/	23
0.00	r	7	~	*knotweed	Polygonum arenastrum	/	9
0.00	r	8		*Bermuda grass	Cynodon dactylon	/	18
0.00	l			(chaparral yucca, Yucca whipplei)
0.00	l	9	~	Engelmann leather oak hybrid	Quercus engelmannii X Q. durata var. gabrielensis	/	3
0.00	l	10		Vasey's prickly-pear	Opuntia vaseyi	/	17
0.00	l	11		*Russian thistle	Salsola tragus	/	23
0.00	l	12		coast live oak	Quercus agrifolia var. agrifolia	/	32
0.00	l	13		*cheeseweed	Malva parviflora	/	13
0.00	c	14		*redstem filaree	Erodium cicutarium	/	39
0.00	r	15		*wild oats	Avena fatua	/	15
0.00	r	16		*sow thistle	Sonchus oleraceus	/	24
0.01	l			Kiosk and shaded benches
0.01	r	17		*Bermuda buttercup	Oxalis pes-caprae	/	6
	r	18		*smilo grass	Piptatherum miliaceum	/	17
	r	19		laurel sumac	Malosma laurina	/	30
	l			Signpost: "Poison oak [territory?]"
	l	20		branching phacelia	Phacelia ramosissima var. latifolia	/	26
	l	21		white nightshade	Solanum douglasii	/	14
	l	22		poison oak	Toxicodendron diversilobum	/	32
	l	23		blue elderberry	Sambucus mexicana	/	36
	l	24		south coast morning-glory	Calystegia macrostegia ssp. intermedia	/	14
	r	25		sacred datura	Datura wrightii	/	14
	l	26		wild-cucumber	Marah macrocarpus var. macrocarpus	/	36
	r	27		western sycamore	Platanus racemosa	/	18
	r	28		*petty spurge	Euphorbia peplus	/	8
0.04	r	29		Southern California black walnut	Juglans californica var. californica	/	4
	l	30		small-flowered melica	Melica imperfecta	/	30
	l	31		heartleaf penstemon	Keckiella cordifolia	/	20
	l	32		toyon	Heteromeles arbutifolia	/	36
	r	33	~	*Mexican Fan Palm	Washingtonia robusta+	/	2
	r			(passion flower, Passiflora caerulea)
	l	34		virgin's bower	Clematis ligusticifolia+	/	6
0.08	l	35		*hedge mustard	Sisymbrium officinale	/	13
	l	36		California brickellbush	Brickellia californica	/	24
	r	37		*Italian thistle	Carduus pycnocephalus	/	11
	l	38		*California burclover	Medicago polymorpha	/	27
	l	39		*bur chervil	Anthriscus caucalis	/	7
	r	40		*passion flower	Passiflora caerulea	/	1
	r	41		pellitory	Parietaria hespera var. hespera	/	4
	r	42		hillside gooseberry	Ribes californicum var. hesperium	/	5
	l	43	sp	3 needle pine	Pinus sp.	/
	l	44		southern honeysuckle	Lonicera subspicata var. denudata	/	31
	l	45		basketbush	Rhus trilobata	/	15
	r	46		California everlasting	Gnaphalium californicum	/	27
	l	47		*tocalote	Centaurea melitensis	/	33
	l	48		*scarlet pimpernel	Anagallis arvensis	/	17
	l	49		*shortpod mustard	Hirschfeldia incana	/	39
	l			Troop 486 Eagle Scout Project for erosion control.
	l	50		*milk thistle	Silybum marianum	/	9
	l	51		white sage	Salvia apiana+	/	29
	l	52		California fuchsia	Epilobium canum ssp. canum+	/	12
	l	53	ssp	California buckwheat	Eriogonum fasciculatum var. foliolosum+	/	39
	l	54		*slender wild oats	Avena barbata	/	24
	l			(small-seeded spurge, Chamaesyce polycarpa)
	l	55		California sagebrush	Artemisia californica	/	33
	l	56		white everlasting	Gnaphalium canescens ssp. microcephalum	/	31
	l	57		long-stemmed buckwheat	Eriogonum elongatum var. elongatum	/	18
	l			(short-leaved cliff-aster, Malacothrix saxatilis var. tenuifolia)
	l	58		California four o'clock	Mirabilis californica	/	15
	l	59		chaparral yucca	Yucca whipplei	/	22
0.14	l	60		*purple false-brome	Brachypodium distachyon	/	4
	l	61		bush monkeyflower	Mimulus aurantiacus	/	32
	l	62	sp	dodder	Cuscuta sp.	/	2
	l	63		narrowleaf bedstraw	Galium angustifolium ssp. angustifolium	/	41
	r	64		hollyleaf redberry	Rhamnus ilicifolia	/	32
0.16	l	65		deerweed	Lotus scoparius var. scoparius+	/	21
	l	66		golden yarrow	Eriophyllum confertiflorum var. confertiflorum	/	43
	l	67		long-leaf bush lupine	Lupinus longifolius	/	3
	r	68		wild sweetpea	Lathyrus vestitus var. vestitus	/	8
	r	69		San Gabriel Mtns. leather oak	Quercus durata var. gabrielensis	/	4
0.18	l	70		short-leaved cliff-aster	Malacothrix saxatilis var. tenuifolia	/	10
0.20	r			Jct. road; sign: "[left] To gate 1.0 mile; [right] To berm 0.4 mile"; continue straight
0.22	l			Jct. path; go left on it.
0.23	r	71		annual sunflower	Helianthus annuus	/	9
0.23	r	72	sp	*wand mullein	Verbascum virgatum	/	3
0.23	r	73		*curly dock	Rumex crispus	/	14
0.23	r	74		purple needlegrass	Nassella pulchra	/	10
0.24				Trail is immediately to left of gate with fence only to the right of the gate.
0.24	l	75		thread-leaved brodiaea	Brodiaea filifolia	/	2
0.24	l	76		*prickly sow thistle	Sonchus asper ssp. asper	/	15
0.24	r	77		*field bindweed	Convolvulus arvensis	/	2
0.26	l	78		*white-stemmed filaree	Erodium moschatum	/	12
0.26	r			(fountain grass, Pennisetum setaceum)
0.27		79		*red brome	Bromus madritensis ssp. rubens	/	39
0.27				Turn-around, but then head to the east off-trail for more Brodiaea and the lemonade berry.
0.31		80		lemonade berry	Rhus integrifolia+	/	12
0.34				Back on the main road; go right, back down trail.
0.36				Back at the jct. with the road to the berm; go left and take it.
0.39	l	81		*purple wild radish	Raphanus sativus	/	10
0.40	r			(California buckeye, Aesculus californica)
0.41		82		California black oak	Quercus kelloggii	/	11
0.44				Road goes up short steep hill.
0.47	b	83		*castor bean	Ricinus communis	/	13
0.47	l			(wall bedstraw, Galium parisiense)
0.48				Road ends at the top of the hill and the berm; return to the road junction.
0.60				Back at the road jct; go right, uphill.
0.62	l	84		*goldentop	Lamarckia aurea	/	12
0.66				Trail curves right 90°
0.67	l	85		*tree tobacco	Nicotiana glauca	/	17
0.69	r	86		*Peruvian pepper tree	Schinus molle	/	5
0.71		87		caterpillar phacelia	Phacelia cicutaria var. hispida	/	9
0.75		88		California buckwheat	Eriogonum fasciculatum var. polifolium	/	12
0.76	l	89		nodding needlegrass	Nassella cernua	/	8
	l			(giant wild-rye, Leymus condensatus)
0.81	r	90		*common beggar-ticks	Bidens pilosa var. pilosa	/	3
0.82	l			lemonade berry	Rhus integrifolia+	/
0.82	r	91		mugwort	Artemisia douglasiana	/	24
0.83	r	92		telegraph weed	Heterotheca grandiflora	/	23
0.86	l			(chamise, Adenostoma fasciculatum)
0.87	l			A yellow bush monkeyflower, Mimulus aurantiacus, immediately next to a red bush monkeyflower. Maybe this is why the Jepson Manual combined the two formerly-separate species into one!
0.89	r			Jct. path (with more Brodiaea?); Trail turns left 90° and steepens.
0.90	r	93		black sage	Salvia mellifera	/	32
0.90	l	94	ssp	*rattail fescue	Vulpia myuros	/	6
0.96				Trail curves right 90°
0.96	r	95		gray sage	Salvia apiana X S. mellifera	/	3
0.97	r			(coffee fern, Pellaea andromedifolia)
0.97	r	96		blue dicks	Dichelostemma capitatum ssp. capitatum	/	31
0.98	r			(California peony, Paeonia californica)
0.99	l	97		purple clarkia	Clarkia purpurea ssp. quadrivulnera	/	13
0.99	r			(creek senecio, Senecio flaccidus var. douglasii)
1.00	r			(lanceleaf dudleya, Dudleya lanceolata)
1.02	r			(bicolored everlasting, Gnaphalium bicolor)
1.03	r	98		rattlesnake weed	Chamaesyce albomarginata	/	2
1.04	b	99		*winter vetch	Vicia villosa ssp. varia	/	11
1.04	b	100		*smooth cat's ear	Hypochaeris glabra	/	22
1.05	l	101	~	bristly goldenaster	Heterotheca sessiliflora ssp. echioides	/	6
1.06	l	102		*alfalfa	Medicago sativa	/	2
1.08				Jct. Glendora Mountain Road; end guide.

http://tchester.org/sgm/plants/guides/colby_trail.html
Updated 11 May 2004.