Flora of Mt. Wilson Toll Road, San Gabriel Mountains

Bob Muns, ~1980

This is a working list, about which we make no guarantees until we finish checking
it. The information below is incomplete, and there may be errors we haven't caught yet.

This plant list is for the Mt. Wilson Toll Road from its beginning at the Pinecrest gate to Henninger Flats. Bob compiled this list from a number of walks from ~1970 to ~1980.

#, Latin Name	Common Name	Life Form Intro sp*	Flower Period	Habitat / Plant Community
Ferns and Fern Allies
Dryopteridaceae	Woodfern Family
1 Dryopteris arguta	Woodfern	P	-	open, wooded slopes, <8000'
2 Polystichum imbricans	Swordfern		-
Polypodiaceae	Polypody Family
3 Polypodium californicum	California Polypody	P	-	shaded places, cliffs, bluffs, rocks
Pteridaceae	Fern Family
4 Aspidotis californica	Lace Fern		-
5 Cheilanthes covillei	Bead Fern	P	-	crevices, bases of rocks
6 Pellaea andromedifolia	Coffee Fern	P	-	rocky or dry areas
7 Pellaea mucronata	Bird's Foot Fern	P	-	rocky or dry areas
8 Pentagramma triangularis	Goldback Fern	P	-	shaded slopes or rocky areas
Selaginellaceae	Spike Moss Family
9 Selaginella bigelovii	Spike-Moss	P	-	open sites, rocks, shrublands
Cupressaceae	Cypress Family
10 Cupressus sp.	Cypress		-
Pinaceae	Pine Family
11 Pinus attenuata	Knobcone Pine		-
12 Pinus coulteri	Coulter Pine		-
13 Pinus sp.	Pine		-
14 Pseudotsuga macrocarpa	Big Cone Spruce	T	-	scattered on slopes, 1000-8000'
Aceraceae	Maple Family
15 Acer macrophyllum	Big Leaf Maple	T	4-5	streambanks, canyons, <5000'
Amaranthaceae	Amaranth Family
16 Amaranthus albus	Pigweed	*A	4-10	weed of waste places, roadsides, fields
17 Amaranthus sp.	Amaranth	A	-	waste places
Anacardiaceae	Sumac Family
18 Malosma laurina	Laurel Sumac	S	2-5	Chap, CSS, cis
19 Rhus ovata	Sugar Bush	S	3-5	canyons, Ch, <4300'
20 Schinus molle	Pepper Tree	*ST	3-6
21 Toxicodendron diversilobum	Poison Oak	S	4-5	canyons, slopes, Ch, OW, <5200'
Asteraceae	Sunflower Family
22 Achillea millefolium	Yarrow	P	3-7
23 Agoseris sp.	Mountain Dandelion	-	-	Ch
24 Ambrosia acanthicarpa	Annual Bur-Sage	A	8-11	weedy places, dry stream bottoms
25 Ambrosia psilostachya	Western Ragweed	P	7-11	weedy pl, Ch, CSS, <2500'
26 Artemisia californica	California Sagebrush	S	8-12	Ch, CS, CSS, <2500'
27 Artemisia douglasiana	Mugwort	P	6-10	open to shady places, often in drainages
28 Baccharis salicifolia	Mule Fat	S	1-12	along water courses, <3500'
29 Bidens pilosa var. pilosa	Beggar-Ticks	*A	5-11	disturbed pl
30 Brickellia californica	California Brickellbush	S	8-10	dry washes, slopes, Ch, CSS, <8000'
31 Brickellia nevinii	Nevin's Brickellbush	SS	9-11	dry slopes and washes, Ch, CSS, 800-5500'
32 Centaurea melitensis	Yellow Star Thistle	*A	5-6	weed of waste pl, roadsides, etc.
33 Chaenactis artemisiifolia	White Pincushion	A	4-7	dry slopes, disturbed places, burns
34 Chaenactis glabriuscula	Yellow Pincushion	A	3-7	Ch, VG
35 Chrysanthemum sp.		*	-
36 Cirsium occidentale var. occidentale	Cobwebby Thistle	B	4-7	grassy, brushy places, Ch, CSS, CS
37 Conyza bonariensis	Little Horseweed	*A	6-8	weed of waste places
38 Conyza canadensis	Horseweed	A	6-9	weed of waste places
39 Cotula australis	Australian Brassbutton	*A	1-5	weedy places, <1000'
40 Encelia sp.			-
41 Ericameria parishii var. parishii	Parish's Goldenbush	S	7-10	dry slopes, 1500-7000', Ch
42 Erigeron foliosus	Fleabane Aster	P	5-7	grassy or brushy places, Ch, YPF, OW
43 Eriophyllum confertiflorum	Golden Yarrow	SS	4-8	dry sl and washes, CSS, Ch
44 Filago californica	California Filago	A	3-6	dry pl, burns, <3500', Ch, CSS
45 Gnaphalium bicolor	Everlasting	P	1-5	dry pl, <2500', CSS, Ch
46 Gnaphalium californicum	California Everlasting	B	1-7	dry hills, disturbed places, <4500'
47 Gnaphalium canescens ssp. microcephalum	Felt-Leaf Everlasting	P	7-10	dry, open places, <4000', Ch
48 Gnaphalium sp.	Cudweed	B	-	disturbed places
49 Gnaphalium sp.	Cudweed	A	-
50 Hazardia squarrosa	Saw-Tooth Goldenbush	S	7-11	dry sl, <4500', Ch, CSS
51 Helianthus annuus	Common Sunflower	A/B	2-10	roadsides and waste places
52 Heterotheca grandiflora	Telegraph Weed	A/B	1-12	weedy roadsides, Ch, CSS
53 Heterotheca sessiliflora	Golden Aster	SS	7-11	dry pl, <6500', Cs, CSS, VG
54 Hypochaeris glabra	Smooth Cat's-Ear	*A	3-6	weed of waste places, fields
55 Lepidospartum squamatum	Scale Broom	S	8-10	dry washes, stream terraces
56 Lessingia filaginifolia	Cudweed Aster	SS	7-10	Ch, CSS, OW
57 Malacothrix saxatilis	Cliff Aster	P	3-9	open places, roadcuts, Ch, CSS etc.
58 Senecio flaccidus var. douglasii	Bush Senecio	S	6-10	washes, dry stream beds, <6000'
59 Senecio vulgaris	Common Groundsel	*A	1-12	weed of gardens and waste places
60 Silybum marianum	Milk Thistle	*A/B	4-7
61 Solidago californica	California Goldenrod	P	7-10	dry or moist places, <8000'
62 Sonchus oleraceus	Sow Thistle	*A	1-12	weed of waste places, etc.
63 Stephanomeria cichoriacea	Tejon Milk-Aster	P	8-10	rocky slopes and canyons, <6000'
64 Stephanomeria virgata	Wand Chicory	A	7-10	dry, open slopes, <7000'
Boraginaceae	Borage Family
65 Cryptantha sp.	Popcorn Flower	A	-	Chap, CSS
Brassicaceae	Mustard Family
66 Arabis sp.			-
67 Brassica rapa	Yellow Field Mustard	*A	-
68 Erysimum capitatum	Wallflower	B	3-7	dry places, <8000', Ch, etc.
69 Hirschfeldia incana	Mediterranean Mustard	*A/B	1-12	weed of waste pl, roadsides, etc.
70 Lepidium sp.	Peppergrass	*A	-
71 Raphanus sativus	Wild Radish	*A	2-7	weed in waste places, fields
72 Sisymbrium officinale	Hedge Mustard	*A	4-7	weed of waste places and waysides
73 Sisymbrium orientale	Oriental Mustard	*A	1-5	weed of roadsides etc.
Cactaceae	Cactus Family
74 Opuntia sp.	Prickly Pear	*S	-	Ch, CSS, VG, YPF
Capparaceae	Caper Family
75 Isomeris arborea	Bladder Pod	S	1-12
Caprifoliaceae	Honeysuckle Family
76 Lonicera subspicata	Southern Honeysuckle	S	6-7	dry slopes, <3000', Ch
77 Sambucus mexicana	Elderberry	S/T	3-9	open flats, valleys, Ch, OW, CSS
78 Symphoricarpos mollis	Snowberry	S	4-6	shaded slopes, <5000', Ch, OW
Caryophyllaceae	Pink Family
79 Cerastium glomeratum	Mouse-Ear Chickweed	*A	2-5	waste pl, along roads, etc.
80 Silene gallica	Catchfly	*A	2-6	weedy pl
81 Silene laciniata ssp. major	Indian Pink	P	5-7	slopes, <5000', Ch, CSS, CS
82 Silene sp.			-
83 Stellaria media	Chickweed	*A	2-9	weed in shaded places
Chenopodiaceae	Goosefoot Family
84 Atriplex semibaccata	Australian Saltbush	*P	4-12	saline waste pl, roadsides, etc.
85 Chenopodium album	Lamb's Quarters	*A	6-10	weed in waste pl, <6000'
86 Chenopodium botrys	Jerusalem Oak	*A	6-10	weedy places, <7000'
87 Salsola tragus	Russian Thistle	*A	7-10	disturbed places, <9000'
Cistaceae	Rock-Rose Family
88 Helianthemum scoparium	Wild Rock Rose	SS	3-6	dry slopes and ridges, CSS, Ch, <4000'
Convolvulaceae	Morning Glory Family
89 Calystegia macrostegia	Wild Morning Glory	P	3-8	dry slopes, <3000', CSS, Ch
Crassulaceae	Stonecrop Family
90 Dudleya lanceolata	Lance-Leaf Liveforever	P	5-7	dry slopes and banks, <3500'
91 Dudleya sp.	Live-Forever		-
Cucurbitaceae	Gourd Family
92 Marah macrocarpus	Wild Cucumber	P	1-4	dry places, <3000', CSS, Ch, OW
Cuscutaceae	Dodder Family
93 Cuscuta sp.	Dodder	A	-	-
Ericaceae	Heath Family
94 Arctostaphylos glauca	Big Berry Manzanita	S	12-3	dry slopes, <4500', Ch
Euphorbiaceae	Spurge Family
95 Chamaesyce sp.	Mat Spurge	A	-
96 Croton californicus	California Croton	P	3-10
97 Eremocarpus setigerus	Turkey Mullein	A	5-10	dry open pl, <2500', CSS, VG, OW
98 Ricinus communis	Castor Bean	*S	1-12	waste pl
Fabaceae	Pea Family
99 Amorpha californica	False Indigo	S	5-7	dry sl, <7500', Ch, YPF, etc.
100 Lathyrus vestitus var. vestitus	Wild Sweet Pea	P	4-6
101 Lotus scoparius	Deerweed	SS	3-8	dry slopes and fans, <5000', CSS, Ch
102 Lotus sp.	Annual Lotus	A	-
103 Lotus strigosus	Strigose Lotus	A	3-6	disturbed pl, <7500, Ch, etc.
104 Lupinus bicolor	Miniature Lupine	A	3-6	open or disturbed pl, VG, YPF, etc.
105 Lupinus hirsutissimus	Stinging Lupine	A	3-5	dry areas, burns, <4000', Ch
106 Lupinus sp.	Bush Lupine	S	-
107 Lupinus truncatus	Truncate Lupine	A	3-5	open grassy pl, burns, Ch, etc.
108 Robinia sp.	Locust	*	-
109 Spartium junceum	Spanish Broom	*S	4-6	dry waste places, roadcuts
110 Trifolium sp.	Clover	A	-
Fagaceae	Oak Family
111 Quercus agrifolia	Coast Live Oak	T	3-4	valleys, slopes, <3000', OW, FW, MEF
112 Quercus berberidifolia	Scrub Oak	S	3-5	dry slopes, Ch, 1000-5000'
113 Quercus chrysolepis	Canyon Oak	T	4-5	canyons, shaded slopes, Ch, MEF
114 Quercus engelmannii			-
115 Quercus wislizenii	Interior Live Oak	T	3-5	interior canyons, sl, Ch, FW
Garryaceae	Silk-Tassel Family
116 Garrya veatchii			-
Geraniaceae	Geranium Family
117 Erodium cicutarium	Red Stem Filaree	*A	2-5	open, disturbed places, statewide, <6500'
Grossulariaceae	Gooseberry Family
118 Ribes aureum	Golden Currant	S	2-4	many habitats, <8000'
119 Ribes malvaceum	Chaparral Currant	S	10-3	dry pl, Ch, OW, <5000'
120 Ribes sp.			-
Hydrophyllaceae	Phacelia Family
121 Eriodictyon crassifolium	Yerba Santa	S	4-6	dry sl, roadsides, washes, <6000'
122 Eucrypta chrysanthemifolia	Eucrypta	A	3-6	canyons, Ch, <3000', after fires
123 Nemophila menziesii	Baby Blue Eyes	A	2-6	meadows, woodlands, etc., <6000'
124 Phacelia cicutaria	Caterpillar Phacelia	A	3-5	rocky pl, <4000', VG, OW
125 Phacelia minor	Wild Canterbury Bells	A	3-6	Chap, CSS
126 Phacelia ramosissima	Branching Phacelia	P	5-8	Ch, YPF
127 Phacelia sp.	Phacelia	P	-	open places, Ch
128 Turricula parryi			-
Lamiaceae	Mint Family
129 Lamium amplexicaule	Dead Nettle	*A	4-9	disturbed pl, widespread, <1150'
130 Lepechinia sp.			-
131 Marrubium vulgare	Horehound	*P	5-8	disturbed pl, widespread, <1100'
132 Salvia apiana	White Sage	S	4-7	dry slopes, CSS, Ch, YPF, <5000'
133 Salvia columbariae	Chia	A	3-6	dry open places, CSS, Ch, <4000'
134 Salvia mellifera	Black Sage	S	4-7	dry slopes and benches, CSS, Ch, <4000'
Lauraceae	Laurel Family
135 Umbellularia californica	California Bay	T	12-5	canyons, valleys, <5000', Ch, FW
Loasaceae	Stick-Leaf Family
136 Mentzelia micrantha	Blazing Star	A	4-5	open, often disturbed places, Ch, FW
Oleaceae	Olive Family
137 Olea europaea		*	-
Onagraceae	Evening Primrose Family
138 Camissonia californica	Mustard Suncups	A	4-5	open pl, CSS, Ch, desert scrub
139 Clarkia sp.	Lilac Clarkia	A	-
140 Epilobium canum	California Fuchsia	SS	8-10	Chap, CSS, OW
141 Epilobium canum ssp. canum	California Fuchsia	SS	8-10	dry slopes, ridges, <2000'
Oxalidaceae	Oxalis Family
142 Oxalis pes-caprae	Bermuda buttercup	*P	11-3	disturbed, waste pl
Papaveraceae	Poppy Family
143 Eschscholzia californica	California Poppy	A/P	2-9	grassy, open pl
Platanaceae	Sycamore Family
144 Platanus racemosa	Western Sycamore	T	2-4	along stream beds, <4000'
Polemoniaceae	Phlox Family
145 Gilia capitata	Globe Gilia	A	4-5	Chap, CSS, YPF, etc.
146 Gilia sp.	Gilia	A	-	open grassy places
147 Leptodactylon californicum	Prickly Phlox	SS	3-6	dry slopes and banks, <5000', Ch, FW
Polygonaceae	Buckwheat Family
148 Chorizanthe sp.	Spiny Herb	A	-	open places
149 Eriogonum elongatum var. elongatum	Wand Buckwheat	P	8-11	dry pl, <6000', Ch, CSS
150 Eriogonum fasciculatum	Calif. Wild Buckwheat	S	1-12	Ch, CSS
151 Pterostegia drymarioides	Thread Stem	A	3-7	shady, often moist pl, <5000'
Portulacaceae	Purslane Family
152 Claytonia perfoliata	Miner's Lettuce	A	2-5	Ch, CSS, OW
Primulaceae	Primrose Family
153 Anagallis arvensis	Scarlet Pimpernel	*A	3-7	weed, disturbed pl
Ranunculaceae	Buttercup Family
154 Clematis sp.	Virgin's Bower		-
155 Delphinium cardinale	Scarlet Larkspur	P	5-6	Chap, CSS, etc.
156 Delphinium sp.			-
Rhamnaceae	Buckthorn Family
157 Ceanothus crassifolius	Hoary-Leaf Ceanothus	S	1-4	dry slopes and fans, <3500', Ch, CSS
158 Ceanothus leucodermis	Chaparral Whitethorn	S	4-6	dry rocky sl, <6000', Ch, OW
159 Ceanothus oliganthus	Hairy-Leaf Ceanothus	S	2-4	dry slopes, <4500', Ch
160 Ceanothus spinosus	Green Stem Ceanothus	S	2-5
161 Rhamnus californica	Coffee Berry	S	5-6	Chap, CSS
162 Rhamnus crocea	Red Berry	S	3-4	dry washes and canyons, Ch, CSS, <3000'
163 Rhamnus ilicifolia	Holly-Leaf Red Berry	S	3-6	dry slopes, <5000', Ch, YPF
Rosaceae	Rose Family
164 Adenostoma fasciculatum	Chamise	S	5-6	dry slopes and ridges, <5000', Ch
165 Cercocarpus betuloides	Mountain Mahogany	S T	3-4	dry sl & washes, <6000', Ch
166 Heteromeles arbutifolia	Toyon	S	6-7	Ch, <4000'
167 Potentilla glandulosa	Cinquefoil	P	5-7
168 Prunus ilicifolia	Holly-Leaf Cherry	S	4-5	Ch, <5000'
Rubiaceae	Bedstraw Family
169 Galium aparine	Cleavers	A	3-7	shaded banks, <7500'
170 Galium sp.	Shrubby Bedstraw	SS	-
Salicaceae	Willow Family
171 Populus balsamifera ssp. trichocarpa	Black Cottonwood	T	2-4	along streams, <6000'
Saxifragaceae	Saxifrage Family
172 Heuchera sp.			-
173 Lithophragma affine	Woodland Star	P	2-6
Scrophulariaceae	Snapdragon Family
174 Antirrhinum multiflorum	Pink Snapdragon	P	5-7	Ch, dry slopes, <4000'
175 Castilleja foliolosa	Felt Indian Paintbrush	P	2-6
176 Castilleja sp.	Indian Paintbrush	P	-	Ch, OW
177 Keckiella cordifolia	Heart-Leaf Penstemon	S	3-8	dry slopes and canyons, Ch
178 Keckiella ternata			-
179 Mimulus aurantiacus	Bush Monkey Flower	SS	4-7	CSS, Ch, dry slopes, <5000'
180 Mimulus brevipes	Yellow Monkey Flower	A	4-6	dry places, <5000', Ch, CSS
181 Penstemon spectabilis	Notable Penstemon	P	4-6
Solanaceae	Nightshade Family
182 Nicotiana glauca	Tree Tobacco	*S/T	4-8	waste pl, on burns, <3000'
183 Solanum douglasii	White Nightshade	SS	1-12	partly shaded slopes, CSS, Ch, etc.
184 Solanum xanti	Purple Nightshade	SS	2-6	Ch, FW, <4000'
Urticaceae	Nettle Family
185 Parietaria hespera	Pellitory	A	2-6	moist, shaded pl
Liliaceae	Lily Family
186 Dichelostemma capitatum	Blue Dicks	P	3-5	Ch, CSS, OW, desert, grasslands
187 Yucca whipplei	Chaparral Yucca	S	4-6	dry slopes, Ch, CSS, 1000-4000'
188 Zigadenus fremontii	White Star Lily	P	3-5	VG, CSS, Ch, <3500'
Poaceae	Grass Family
189 Agropyron sp.	Wheat Grass	P	-	Ch, YPF, dry slopes, <5000'
190 Arundo donax	Giant Reed	*P	3-9	by streams, moist pl
191 Avena barbata	Slender Oats	*A	3-6	weed of waste places, open slopes
192 Avena fatua	Wild Oats	*A	4-6	weed of waste places, open slopes
193 Avena sativa	Barley	*A	4-6
194 Bromus catharticus	Rescue Grass	*A/B	4-11
195 Bromus diandrus	Rip Gut Brome	*A	4-6	weed of waste places, open slopes
196 Bromus madritensis ssp. rubens	Red Brome	*A	3-6	weed of disturbed, open pl
197 Bromus sp.	Brome Grass	*	-
198 Bromus tectorum	Cheat Grass	*A	5-6	open disturbed places, mostly <3000'
199 Cynodon dactylon	Bermuda Grass	*P	6-8	waste and low places, forming tough sod
200 Lamarckia aurea	Goldentop	*A	2-5	weed of disturbed places
201 Leymus condensatus	Giant Rye Grass	P	6-8	CSS, Ch, OW
202 Melica imperfecta	Coast Range Melic	P	4-5	CSS, Ch, OW, YPF
203 Nassella sp.	Needlegrass	P	-	Ch, CSS, OW
204 Pennisetum clandestinum	Kikuyu Grass	*P	-
205 Pennisetum setaceum	Fountain Grass	*P	7-10
206 Piptatherum miliaceum	Smilo	*P	4-9	waste and disturbed places, low elevation
207 Schismus barbatus	Abu-Mashi	*A	3-4	disturbed places, deserts
208 Vulpia sp.	Fescue	*A	-	Ch, CSS, OW
Abbreviations: T = Tree S = Shrub SS = Subshrub A = Annual B = Biennial P = Perennial * = Introduced Ch = Chaparral CS = Coastal Strand OW = Oak Woodland CSS = Coastal Sage    Scrub Rp = Riparian CSM = Coastal Salt Marsh FWM = Freshwater Marsh W = Weedy, Waste & Disturbed Places MC = Many Communities & = And Other Communities

Plant list digitized and names updated to accord with The Jepson Manual by Tom Chester on 20 November 2002. The printed flora ends with #213; but the following entries were not added to the list above:

#	Entry
59	(blank)
76	O (follows #75, Opuntia)
101	(blank)
106	L (follows #105, Lotus strigosus)
129	Phacelia (follows #128, Phacelia, but has no other entry information)

Nassella sp.. Because Stipa was split up into Achnatherum and Nassella, we cannot be certain that Stipa sp. has become Nassella sp.. However, because Bob's name for this is Needlegrass, it is likely.

Vulpia sp.. Because Festuca was split up into Festuca and Vulpia, we have no way of knowing from this Flora alone whether this should be listed as Festuca or Vulpia. Since in our experience the weedy non-native Vulpia species are encountered much more frequently than Festuca species, we have chosen to change Bob's original entry of "Festuca sp." to "Vulpia sp.". Note that this could be incorrect, and anyone using this flora should beware.

Changes to Bob Muns' Flora of Mt. Wilson Toll Road.

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