Plant Guide to S. Los Santos Trail / E. Hidden Valley Road, Santa Rosa Plateau

Mile	S	#	ID?	Common Name	Latin Name	#Here	#All
0.00				Beginning of south end of trail at jct. with Vernal Pool Trail; elevation 2080 feet (634 m); trail immediately descends from the Mesa de Colorado.
0.00	l	1		*soft chess	Bromus hordeaceus	99 / 9	40
0.00	b	2		*wild oats	Avena fatua	99 / 9	26
0.00	l	3		*ripgut brome	Bromus diandrus	99 / 9	52
0.00	b	4		*short-fruited filaree	Erodium brachycarpum	99 / 9	14
0.00	b	5		*smooth cat's ear	Hypochaeris glabra	99 / 9	35
0.00	r	6		dwarf lupine	Lupinus bicolor	99 / 9	29
0.00	r	7		graceful tarplant	Holocarpha virgata ssp. elongata	99 / 9	15
0.00	r	8		sharp-toothed sanicle	Sanicula arguta	50 / 9	16
0.00	l	9		*shortpod mustard	Hirschfeldia incana	99 / 9	51
0.00	r			Sign: "Los Santos Trail / To Ranch Road 2.4 mi"
0.00	r	10		southern California morning-glory	Calystegia macrostegia ssp. arida+	10 / 5	8
0.00		11		dove weed	Eremocarpus setigerus	99 / 9	25
0.00	r	12		California buckwheat	Eriogonum fasciculatum var. foliolosum	2 / 2	51
0.00	l	13		California-aster	Lessingia filaginifolia var. filaginifolia	50 / 9	51
0.00	l	14		*red brome	Bromus madritensis ssp. rubens	99 / 9	53
0.00	r	15		purple needlegrass	Nassella pulchra	99 / 9	20
0.00	b	16		blue dicks	Dichelostemma capitatum ssp. capitatum	99 / 9	46
0.00	r	17		San Diego birdsfoot lotus	Lotus hamatus	99 / 9	24
0.00	r	18		rusty-haired popcorn flower	Plagiobothrys nothofulvus	99 / 9	13
0.00	r	19		checkerbloom	Sidalcea malviflora ssp. sparsifolia	99 / 9	25
0.01	r	20		splendid mariposa lily	Calochortus splendens	99 / 9	20
0.01	r	21		purple clarkia	Clarkia purpurea ssp. quadrivulnera	99 / 9	26
0.01	r	22		common lomatium	Lomatium utriculatum	20 / 7	3
0.01	r	23		*narrowleaf filago	Filago gallica	99 / 9	45
0.01	r	24		rattlesnake weed	Daucus pusillus	99 / 9	29
0.01	r	25		johnny jump-up	Viola pedunculata	99 / 9	16
0.01	r			(telegraph weed, Heterotheca grandiflora; Vasey's prickly pear, Opuntia Xvaseyi; a young Engelmann oak, Quercus engelmannii)
0.02	r	26		Gambel's dwarf milk-vetch	Astragalus gambelianus	2 / 1	4
0.02	r	27		balloon clover	Trifolium depauperatum var. truncatum	99 / 9	7
0.02	r	28		purple sanicle	Sanicula bipinnatifida	50 / 9	11
0.02		29		pin-point clover	Trifolium gracilentum var. gracilentum	10 / 2	8
0.03	r			(California everlasting, Gnaphalium californicum)
0.03	r			(coast live oak, Quercus agrifolia var. agrifolia; California fuchsia, Epilobium canum ssp. canum)
0.04				Trail bends left.
0.04	r	30		fringe-pod	Thysanocarpus curvipes	50 / 9	9
0.05				Trail bends right.
0.05	r	31		*windmill pink	Silene gallica	99 / 9	33
0.05	r	32		leafy daisy	Erigeron foliosus var. foliosus	10 / 9	44
0.05	l	33		tomcat clover	Trifolium willdenovii	10 / 2	17
0.05	r	34		*hairy rattail fescue	Vulpia myuros var. hirsuta	99 / 9	19
0.05	b	35		*hedge mustard	Sisymbrium officinale	99 / 9	20
0.05	b	36		southern miner's lettuce	Claytonia perfoliata ssp. mexicana	99 / 9	25
0.05	r	37		*common chickweed	Stellaria media	5 / 1	25
0.05	b	38		common bedstraw	Galium aparine	99 / 9	38
0.05	l	39		*redstem filaree	Erodium cicutarium	50 / 9	55
0.05	r	40		coast live oak	Quercus agrifolia var. agrifolia	10 / 9	42
0.05	r	41		*California burclover	Medicago polymorpha	99 / 9	40
0.05	r			(poison oak, Toxicodendron diversilobum)
0.05	b	42		*sow thistle	Sonchus oleraceus	20 / 9	42
0.06				Enter small grove of Engelmann oaks.
0.06	l	43		*hedge parsley	Torilis nodosa	99 / 9	14
0.06	l	44		tree clover	Trifolium ciliolatum	10 / 2	12
0.06	l	45		blue larkspur	Delphinium parryi ssp. parryi	10 / 5	14
0.06	r	46		*slender wild oats	Avena barbata	/	40
0.06	r	47		*Darnel	Lolium temulentum	20 / 2	4
0.06	r	48		California brome	Bromus carinatus var. carinatus	10 / 2	24
0.06	b	49		*foxtail barley	Hordeum murinum ssp. glaucum	99 / 9	13
0.06	l	50		Engelmann oak	Quercus engelmannii	30 / 9	23
0.06	r	51		*prickly lettuce	Lactuca serriola	50 / 9	42
0.07	l	52		poison oak	Toxicodendron diversilobum	10 / 9	43
0.08	l	53		wild-cucumber	Marah macrocarpus var. macrocarpus	10 / 4	44
0.08	r			Bench without a back.
0.08	r	54		*yellow salsify	Tragopogon dubius	1 / 1	13
0.08				Exit small grove of Engelmann oaks.
0.09	r	55		Indian clover	Trifolium albopurpureum var. albopurpureum	10 / 2	3
0.09	r	56		California lotus	Lotus wrangelianus	5 / 1	4
0.10	l	57		red maids	Calandrinia ciliata	99 / 9	17
0.11				Trail bends left.
0.11	l	58		*scarlet pimpernel	Anagallis arvensis	99 / 9	33
0.12	l	59		blue-eyed grass	Sisyrinchium bellum	99 / 9	19
0.12	b	60		western buttercup	Ranunculus occidentalis	99 / 9	6
0.12				Trail bends right.
0.13				Minor local low point on trail.
0.13	l	61		*bristly ox-tongue	Picris echioides	4 / 2	11
0.13	l	62		*Italian rye-grass	Lolium multiflorum	99 / 9	18
0.14	r	63		silver puffs	Uropappus lindleyi	/	26
0.14	r	64		slender cottonweed	Micropus californicus var. californicus	99 / 2	7
0.14	r	65		wrinkled rush	Juncus rugulosus+	30 / 5	13
0.14	r	66		dense sedge	Carex densa	1 / 1	3
0.15	r	67		purple owl's clover	Castilleja exserta ssp. exserta	5 / 2	13
0.15				Minor local high point on trail
0.15	r	68		*mouse-ear chickweed	Cerastium glomeratum	10 / 1	19
0.17	b	69		*tocalote	Centaurea melitensis	99 / 9	45
0.18	l	70		goldenstar	Bloomeria crocea	20 / 1	12
0.18	r	71		*English rye-grass	Lolium perenne	/	2
0.18	r	72		California plantain	Plantago erecta	40 / 2	13
0.18	r			Begin field of slender cottonweed, Micropus californicus var. californicus.
0.19	r	73		three spot	Osmadenia tenella	30 / 1	15
0.19	b	74		*nit grass	Gastridium ventricosum	99 / 9	26
0.19				Trail turns left 90° around a large Engelmann oak.
0.20	r	75		warty spurge	Euphorbia spathulata	10 / 1	4
0.20	r	76		flax-flowered linanthus	Linanthus liniflorus	20 / 1	2
0.20	r	77		tawny popcorn flower	Plagiobothrys fulvus	10 / 2	3
0.20		78		*Crete weed	Hedypnois cretica	10 / 2	20
0.22				End field of slender cottonweed, Micropus californicus var. californicus.
0.22		79		one-sided bluegrass	Poa secunda ssp. secunda	10 / 2	23
0.23				Jct. east end of shortcut trail (ahead); go right. In late 2003, the shortcut trail now looks like the main trail, with the trail itself becoming disused.
0.24	b	80		toad rush	Juncus bufonius var. bufonius	30 / 3	14
0.24	b	81		clustered toad rush	Juncus bufonius var. congestus	10 / 1	9
0.24				Cross small drainage
0.24	r	82		*cut-leaved geranium	Geranium dissectum	20 / 2	13
0.24	l	83		*curly dock	Rumex crispus	10 / 5	23
0.25	b	84		soap plant	Chlorogalum pomeridianum var. pomeridianum	20 / 9	19
0.27	r			(California thistle, Cirsium occidentale var. californicum)
0.28	r	85		chocolate lily	Fritillaria biflora var. biflora	5 / 2	5
0.28	r			(white-flowering currant, Ribes indecorum)
0.28	r			Bench without a back.
0.28	r	86		southern honeysuckle	Lonicera subspicata var. denudata	2 / 2	40
0.28	r			A yellow-flowered "purple sanicle", Sanicula bipinnatifida
0.28	r	87		California everlasting	Gnaphalium californicum	3 / 3	43
0.28	r			(toyon, Heteromeles arbutifolia; grand mountain dandelion, Agoseris grandiflora; and a field of chocolate lilies, Fritillaria biflora var. biflora, and slender tarweed, Hemizonia fasciculata.)
0.28	r	88		climbing bedstraw	Galium nuttallii ssp. nuttallii	20 / 3	30
0.29				Trail turns left and descends to cross drainage.
0.29	b	89		*winter vetch	Vicia villosa ssp. varia	99 / 2	19
0.29	r	90		goldenrod	Solidago californica	10 / 1	35
0.29	l	91		seashore bentgrass	Agrostis pallens	20 / 1	11
0.29	r	92		milk maids	Cardamine californica var. californica	20 / 1	6
0.29	r			(meadow-rue, Thalictrum fendleri var. polycarpum)
0.29	b	93		*Italian thistle	Carduus pycnocephalus+	20 / 2	21
0.29				Cross drainage; local low point, elevation 1990 feet (605 m); channel was deepened by about 1 foot in early 2005. Very old Engelmann oak immediately downstream.
0.29	r	94		*little-seed canarygrass	Phalaris minor	1 / 1	2
0.29	b	95		deergrass	Muhlenbergia rigens	10 / 1	21
0.29	r			(whorled dock, Rumex conglomeratus)
0.30	c	96		slender tarweed	Hemizonia fasciculata	20 / 3	18
0.30	l			(California squirreltail, Elymus elymoides ssp. californicus)
0.31	r			(coyote bush, Baccharis pilularis)
0.32	l	97		fragrant everlasting	Gnaphalium canescens ssp. beneolens	2 / 2	23
0.32	r	98		nodding needlegrass	Nassella cernua	/	17
0.32	b	99		Indian milkweed	Asclepias eriocarpa	30 / 9	18
0.33	l			Jct. west end of shortcut trail; continue straight.
0.33	r			(laurel sumac, Malosma laurina)
0.34	l			Field of purple needlegrass, Nassella pulchra; trail bends right and goes uphill.
0.36	l	100		blue wildrye	Elymus glaucus ssp. glaucus	10 / 2	21
0.36	r	101		deerweed	Lotus scoparius var. scoparius	5 / 2	29
0.37	l	102		*goldentop	Lamarckia aurea	10 / 2	22
0.37				Trail bends left and soon flattens out.
0.37	r	103		chamise	Adenostoma fasciculatum	5 / 1	37
0.37	r	104		yellow mariposa lily	Calochortus weedii var. weedii	10 / 2	12
0.37	r			(bristly bird's beak, Cordylanthus rigidus ssp. setigerus)
0.37	r	105		heartleaf penstemon	Keckiella cordifolia	1 / 1	28
0.37	r			(golden yarrow, Eriophyllum confertiflorum var. confertiflorum)
0.37	l			Begin field of Mariposa lilies, Calochortus splendens.
0.39	r	106		Torrey's scrub oak	Quercus acutidens	2 / 2	26
0.39	r			(hollyleaf redberry, Rhamnus ilicifolia)
0.39	r	107		white sage	Salvia apiana	1 / 1	38
0.39	r	108		strigose lotus	Lotus strigosus	10 / 1	33
0.39	r			(rush-rose, Helianthemum scoparium)
0.40	r			End field of splendid Mariposa lilies, Calochortus splendens; trail curves right; cross old fenceline (see barbed-wire fenceposts on both sides; division between 1984 and 1991 purchases?)
0.41	l			(Vasey's prickly-pear, Opuntia vaseyi)
0.41	l	109		San Diego wreathplant	Stephanomeria diegensis	99 / 9	21
0.41	l			Second chocolate lily patch on trail
0.43				Trail enters field of needlegrass, blue-eyed grass, and both slender and graceful tarweed. Edge of Mesa de Colorado ahead; view of San Jacinto Peak at 2 o'clock
0.45	l	110		canchalagua	Centaurium venustum	4 / 4	15
0.45	r			View of white spot on hill across drainage - rock exposure?
	l	111		earth brodiaea	Brodiaea terrestris ssp. kernensis	20 / 1	7
0.46	r	112		*prickly sow thistle	Sonchus asper ssp. asper	20 / 5	30
0.48	b	113		popcorn flower	Cryptantha intermedia	50 / 3	27
0.48				Trail steeply ascends edge of Mesa de Colorado.
0.48	b	114		caterpillar phacelia	Phacelia cicutaria var. hispida	50 / 2	16
0.49	b	115		San Diego pea	Lathyrus vestitus var. alefeldii	4 / 2	21
0.49				End steepest part of ascent; trail jags left
0.49	r			(California sagebrush, Artemisia californica)
0.50	r			(A patch of ~5 white-flowered "blue dicks" plants, Dichelostemma capitatum ssp. capitatum)
0.50	b	116		California oxalis	Oxalis albicans ssp. californica	5 / 2	4
0.50				Trail is now on top of Mesa de Colorado and bends right; elevation ~2050 feet (625 m). Note unusual white blooms of bush lupine off-trail to left, looking like chick lupine, Lupinus microcarpus var. microcarpus
0.51	b	117		slim vetch	Vicia ludoviciana var. ludoviciana	5 / 1	9
0.51	b	118		bird's-foot fern	Pellaea mucronata var. mucronata	2 / 1	30
0.51	l	119		coast-range melic	Melica imperfecta	10 / 4	43
0.51	b	120		long-stemmed buckwheat	Eriogonum elongatum var. elongatum	20 / 2	28
0.51	r	121		narrowleaf bedstraw	Galium angustifolium ssp. angustifolium	2 / 2	49
0.52	b	122		bush lupine	Lupinus excubitus var. hallii	50 / 3	10
0.52	b			The bush lupine produces a stunning display here and shortly beyond here, with colors varying from white to pink to blue to lavender to purple
0.53	r	123		lanceleaf dudleya	Dudleya lanceolata	1 / 1	20
0.55				Trail jogs right.
0.58	r	124		common fiddleneck	Amsinckia menziesii var. intermedia	5 / 1	15
0.58	l	125		bicolored everlasting	Gnaphalium bicolor	1 / 1	29
0.59				Enter small grove of seven Engelmann oaks.
0.60	b	126		miner's lettuce	Claytonia perfoliata ssp. perfoliata	50 / 2	23
0.61				Leave small grove of Engelmann oaks; trail bends right.
0.61	b	127		Spanish clover	Lotus purshianus var. purshianus	99 / 9	31
0.62	l	128		vinegar weed	Trichostema lanceolatum	50 / 9	15
0.63	b	129		*grass poly	Lythrum hyssopifolia	50 / 4	15
0.63	c	130		winged water-starwort	Callitriche marginata	3 / 1	5
0.63	l	131		shining peppergrass	Lepidium nitidum var. nitidum	10 / 1	6
0.63	l	132		pygmy-weed	Crassula connata	20 / 1	28
0.63	l	133		*annual blue grass	Poa annua	20 / 2	12
0.63	l	134		purslane speedwell	Veronica peregrina ssp. xalapensis	3 / 1	3
0.63	l	135		*rabbits-foot grass	Polypogon monspeliensis	20 / 2	24
0.63				Cross drainage from old vernal pool at center of bowl-shaped area to left. (The old vernal pool area also drains to west.)
0.63	b	136		*Mediterranean barley	Hordeum marinum ssp. gussoneanum	20 / 1	6
0.64	r	137		ground pink	Linanthus dianthiflorus	5 / 1	9
0.65	l	138		brown microseris	Stebbinsoseris heterocarpa	/ 1	3
0.65	l			(California peony, Paeonia californica)
0.65	b	139		angel's gilia	Gilia angelensis	50 / 4	14
0.67				Trail leaves the Mesa top briefly.
0.67		140		goldfields	Lasthenia californica	5 / 1	12
0.68	l	141		prickly cryptantha	Cryptantha muricata	50 / 1	16
0.69				Local low point on trail, elevation ~2020 feet (615 m)
0.70	r	142		slender wreathplant	Stephanomeria exigua ssp. deanei	2 / 1	14
0.71	r	143		California thistle	Cirsium occidentale var. californicum	1 / 1	11
0.72				Trail is now back on top of the Mesa de Colorado
0.73	r			(horseweed, Conyza canadensis)
0.74	r			(purple head, Acourtia microcephala)
0.75	r	144		Vasey's prickly-pear	Opuntia vaseyi	1 / 1	24
0.75	r			(California bee plant, Scrophularia californica ssp. floribunda)
0.77				Trail curves around a large Engelmann oak.
0.77	r	145		bajada lupine	Lupinus concinnus	10 / 3	11
0.78	b	146		collar lupine	Lupinus truncatus	99 / 9	24
0.79				Trail curves left 90°.
0.80	r			(blue elderberry, Sambucus mexicana)
0.81	l			Good view of Avenaloca and Redonda Mesas; (low wall made of basalt boulders)
0.86	r	147		laurel sumac	Malosma laurina	1 / 1	42
0.86	l			(California fuchsia, Epilobium canum ssp. canum)
0.91				Minor local low point on trail where it curves right around a large coast live oak
0.93	l			Trail curves right 90° near local high point on trail; elevation ~2050 feet (625 m)
0.95	r			New (in 2005) big Italian thistle patch, weeded out
1.00	l			Note unusual hillside location for plants normally found in drainages such as Juncus rugulosus, Lythrum hyssopifolia and Juncus bufonius
1.03	l			(closest blue elderberry, Sambucus mexicana)
1.04				Local low point on trail.
1.04	l	148		white-flowering currant	Ribes indecorum	2 / 2	22
1.07	l	149		coyote bush	Baccharis pilularis	1 / 1	25
1.08	l	150		*white-stemmed filaree	Erodium moschatum	10 / 1	20
1.08				Local high point
1.08	l	151		horseweed	Conyza canadensis	10 / 9	37
1.08	l			Field of seedling coast live oaks, Quercus agrifolia, in 2005; 10% dead on 7/9/05, 30-40% dead on 9/12/05 and 2/23/06
1.10	l	152		California bee plant	(dead) Scrophularia californica ssp. floribunda+	5 / 1	17
1.10				Local low point on trail.
1.11				Local high point on trail; trail begins descent to Hidden Valley Spur Road
1.13	r	153		slender madia	Madia gracilis	5 / 1	19
1.13	l	154		long-spurred plectritis	Plectritis ciliosa ssp. insignis	30 / 2	3
1.13	b	155		grand mountain dandelion	Agoseris grandiflora	5 / 1	11
1.18				Descent is now steep.
1.20	r	156		(dead) big squirreltail	(dead) Elymus multisetus+	10 / 1	7
1.20				Trail turns right 90°
1.21	r	157		golden yarrow	Eriophyllum confertiflorum var. confertiflorum	1 / 1	56
1.21	b	158		*spring vetch	Vicia sativa ssp. sativa	99 / 5	6
1.26				Huge patch of spring vetch appeared here in 2005
1.27	r			(Huge circle of winter vetch, Vicia villosa ssp. varia, appeared a hundred feet from the trail here in 2003)
1.27	r	159		western ragweed	Ambrosia psilostachya	50 / 5	37
1.28	b	160		*jointed goatgrass	Aegilops cylindrica	50 / 9	4
1.29				End S. Los Santos Trail at Hidden Valley Spur Road; low point, elevation ~1920 feet (585 m); turn right on Hidden Valley Spur Road
1.29	l			(western sycamore, Platanus racemosa; big leaf mistletoe, Phoradendron macrophyllum)
1.30	r	161		elk thistle	Cirsium scariosum	2 / 2	11
1.31	l	162		*Bermuda grass	Cynodon dactylon	50 / 9	31
1.31	b	163		*sand spurrey	Spergularia bocconei	99 / 9	14
1.39				Begin steep short uphill.
1.42				Top of ascent; Jct. Hidden Valley Road; 200 inch telescope visible on Palomar Mountain; continue straight; elevation 1930 feet (590 m); sign facing that section of road: "Los Santos Trail (to right); To Adobes 1.5 mi (to left)"
1.46	l			(California poppy, Eschscholzia californica)
1.46	c	164		rattlesnake weed	Chamaesyce albomarginata	3 / 1	10
1.48	c	165		*knotweed	Polygonum arenastrum	50 / 9	20
1.49	r	166		*rose clover	Trifolium hirtum	10 / 1	13
1.49	c	167		*pineapple weed	Chamomilla suaveolens	20 / 3	19
1.49	c	168		*weak blue grass	Poa infirma	10 / 1	6
1.49				Cross small drainage
1.55	r			Beautiful field of blue-eyed grass, Sisyrinchium bellum; local high point, elevation ~1940 feet (590 m)
1.61	r	169	~	California meadow barley	Hordeum brachyantherum ssp. californicum	10 / 1	3
1.62	l	170		mule fat	Baccharis salicifolia	1 / 1	39
1.70	l			Check for different Juncus or Eleocharis
1.74	r			(Small field of California poppy, Eschscholzia californica)
1.75	b	171		creeping wild rye	Leymus triticoides	20 / 1	12
1.79	l			Good display of bush lupine, Lupinus excubitus var. hallii
1.83	r			(southern cattail, Typha domingensis; former cattle holding pen)
1.91	l	172		small-flowered fiddleneck	Amsinckia menziesii var. menziesii	10 / 2	8
1.91	r			(Windmill)
1.93	l			Jct. fenced-off old Hidden Valley Road; sign: "Hidden Valley Road (left); to Trailhead 1.3 mi (left)"
1.93	l	173		*horehound	Marrubium vulgare	5 / 1	32
1.95	r	174		*bull thistle	Cirsium vulgare	3 / 1	19
1.95	l	175	sp	goosefoot	Chenopodium sp.	1 / 1
1.97	r	176		Mexican rush	Juncus mexicanus	20 / 1	16
1.97				Beginning of bridge to dross drainage; elevation ~1875 feet (570 m)
1.97	l	177		*whorled dock	Rumex conglomeratus	3 / 1	11
1.97	b	178		common spikerush	Eleocharis macrostachya	20 / 1	12
1.97	b	179		*dallis grass	Paspalum dilatatum	2 / 1	9
1.97	b	180		Siskiyou aster	Aster lanceolatus ssp. hesperius	20 / 1	2
1.97	b	181		clustered field sedge	Carex praegracilis	50 / 1	4
2.03				Cross between two old supports for a gate
2.05				Saddle between Poppy Hill and S. Trans Preserve Trail ridge; elevation ~1910 feet (582 m); view of 200 inch Palomar Telescope ahead.
2.09				Jct. Trans Preserve Trail; elevation 1880 feet (573 m); see its plant guide if you are turning right on it; end this guide

http://tchester.org/srp/plants/guides/s_los_santos.html
Updated 4 March 2006.