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

MileS#ID?Common NameLatin 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.
0.00l1 *soft chessBromus hordeaceus99 / 940
0.00b2 *wild oatsAvena fatua99 / 926
0.00l3 *ripgut bromeBromus diandrus99 / 952
0.00b4 *short-fruited filareeErodium brachycarpum99 / 914
0.00b5 *smooth cat's earHypochaeris glabra99 / 935
0.00r6 dwarf lupineLupinus bicolor99 / 929
0.00r7 graceful tarplantHolocarpha virgata ssp. elongata99 / 915
0.00r8 sharp-toothed sanicleSanicula arguta50 / 916
0.00l9 *shortpod mustardHirschfeldia incana99 / 951
0.00r  Sign: "Los Santos Trail / To Ranch Road 2.4 mi"
0.00r10 southern California morning-gloryCalystegia macrostegia ssp. arida+10 / 58
0.00 11 dove weedEremocarpus setigerus99 / 925
0.00r12 California buckwheatEriogonum fasciculatum var. foliolosum2 / 251
0.00l13 California-asterLessingia filaginifolia var. filaginifolia50 / 951
0.00l14 *red bromeBromus madritensis ssp. rubens99 / 953
0.00r15 purple needlegrassNassella pulchra99 / 920
0.00b16 blue dicksDichelostemma capitatum ssp. capitatum99 / 946
0.00r17 San Diego birdsfoot lotusLotus hamatus99 / 924
0.00r18 rusty-haired popcorn flowerPlagiobothrys nothofulvus99 / 913
0.00r19 checkerbloomSidalcea malviflora ssp. sparsifolia99 / 925
0.01r20 splendid mariposa lilyCalochortus splendens99 / 920
0.01r21 purple clarkiaClarkia purpurea ssp. quadrivulnera99 / 926
0.01r22 common lomatiumLomatium utriculatum20 / 73
0.01r23 *narrowleaf filagoFilago gallica99 / 945
0.01r24 rattlesnake weedDaucus pusillus99 / 929
0.01r25 johnny jump-upViola pedunculata99 / 916
0.01r  (telegraph weed, Heterotheca grandiflora; Vasey's prickly pear, Opuntia Xvaseyi; a young Engelmann oak, Quercus engelmannii)
0.02r26 Gambel's dwarf milk-vetchAstragalus gambelianus2 / 14
0.02r27 balloon cloverTrifolium depauperatum var. truncatum99 / 97
0.02r28 purple sanicleSanicula bipinnatifida50 / 911
0.02 29 pin-point cloverTrifolium gracilentum var. gracilentum10 / 28
0.03r  (California everlasting, Gnaphalium californicum)
0.03r  (coast live oak, Quercus agrifolia var. agrifolia; California fuchsia, Epilobium canum ssp. canum)
0.04   Trail bends left.
0.04r30 fringe-podThysanocarpus curvipes50 / 99
0.05   Trail bends right.
0.05r31 *windmill pinkSilene gallica99 / 933
0.05r32 leafy daisyErigeron foliosus var. foliosus10 / 944
0.05l33 tomcat cloverTrifolium willdenovii10 / 217
0.05r34 *hairy rattail fescueVulpia myuros var. hirsuta99 / 919
0.05b35 *hedge mustardSisymbrium officinale99 / 920
0.05b36 southern miner's lettuceClaytonia perfoliata ssp. mexicana99 / 925
0.05r37 *common chickweedStellaria media5 / 125
0.05b38 common bedstrawGalium aparine99 / 938
0.05l39 *redstem filareeErodium cicutarium50 / 955
0.05r40 coast live oakQuercus agrifolia var. agrifolia10 / 942
0.05r41 *California burcloverMedicago polymorpha99 / 940
0.05r  (poison oak, Toxicodendron diversilobum)
0.05b42 *sow thistleSonchus oleraceus20 / 942
0.06   Enter small grove of Engelmann oaks.
0.06l43 *hedge parsleyTorilis nodosa99 / 914
0.06l44 tree cloverTrifolium ciliolatum10 / 212
0.06l45 blue larkspurDelphinium parryi ssp. parryi10 / 514
0.06r46 *slender wild oatsAvena barbata / 40
0.06r47 *DarnelLolium temulentum20 / 24
0.06r48 California bromeBromus carinatus var. carinatus10 / 224
0.06b49 *foxtail barleyHordeum murinum ssp. glaucum99 / 913
0.06l50 Engelmann oakQuercus engelmannii30 / 923
0.06r51 *prickly lettuceLactuca serriola50 / 942
0.07l52 poison oakToxicodendron diversilobum10 / 943
0.08l53 wild-cucumberMarah macrocarpus var. macrocarpus10 / 444
0.08r  Bench without a back.
0.08r54 *yellow salsifyTragopogon dubius1 / 113
0.08   Exit small grove of Engelmann oaks.
0.09r55 Indian cloverTrifolium albopurpureum var. albopurpureum10 / 23
0.09r56 California lotusLotus wrangelianus5 / 14
0.10l57 red maidsCalandrinia ciliata99 / 917
0.11   Trail bends left.
0.11l58 *scarlet pimpernelAnagallis arvensis99 / 933
0.12l59 blue-eyed grassSisyrinchium bellum99 / 919
0.12b60 western buttercupRanunculus occidentalis99 / 96
0.12   Trail bends right.
0.13   Minor local low point on trail.
0.13l61 *bristly ox-tonguePicris echioides4 / 211
0.13l62 *Italian rye-grassLolium multiflorum99 / 918
0.14r63 silver puffsUropappus lindleyi / 26
0.14r64 slender cottonweedMicropus californicus var. californicus99 / 27
0.14r65 wrinkled rushJuncus rugulosus+30 / 513
0.14r66 dense sedgeCarex densa1 / 13
0.15r67 purple owl's cloverCastilleja exserta ssp. exserta5 / 213
0.15   Minor local high point on trail
0.15r68 *mouse-ear chickweedCerastium glomeratum10 / 119
0.17b69 *tocaloteCentaurea melitensis99 / 945
0.18l70 goldenstarBloomeria crocea20 / 112
0.18r71 *English rye-grassLolium perenne / 2
0.18r72 California plantainPlantago erecta40 / 213
0.18r  Begin field of slender cottonweed, Micropus californicus var. californicus.
0.19r73 three spotOsmadenia tenella30 / 115
0.19b74 *nit grassGastridium ventricosum99 / 926
0.19   Trail turns left 90° around a large Engelmann oak.
0.20r75 warty spurgeEuphorbia spathulata10 / 14
0.20r76 flax-flowered linanthusLinanthus liniflorus20 / 12
0.20r77 tawny popcorn flowerPlagiobothrys fulvus10 / 23
0.20 78 *Crete weedHedypnois cretica10 / 220
0.22   End field of slender cottonweed, Micropus californicus var. californicus.
0.22 79 one-sided bluegrassPoa secunda ssp. secunda10 / 223
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.
0.24b80 toad rushJuncus bufonius var. bufonius30 / 314
0.24b81 clustered toad rushJuncus bufonius var. congestus10 / 19
0.24   Cross small drainage
0.24r82 *cut-leaved geraniumGeranium dissectum20 / 213
0.24l83 *curly dockRumex crispus10 / 523
0.25b84 soap plantChlorogalum pomeridianum var. pomeridianum20 / 919
0.27r  (California thistle, Cirsium occidentale var. californicum)
0.28r85 chocolate lilyFritillaria biflora var. biflora5 / 25
0.28r  (white-flowering currant, Ribes indecorum)
0.28r  Bench without a back.
0.28r86 southern honeysuckleLonicera subspicata var. denudata2 / 240
0.28r  A yellow-flowered "purple sanicle", Sanicula bipinnatifida
0.28r87 California everlastingGnaphalium californicum3 / 343
0.28r  (toyon, Heteromeles arbutifolia; grand mountain dandelion, Agoseris grandiflora; and a field of chocolate lilies, Fritillaria biflora var. biflora, and slender tarweed, Hemizonia fasciculata.)
0.28r88 climbing bedstrawGalium nuttallii ssp. nuttallii20 / 330
0.29   Trail turns left and descends to cross drainage.
0.29b89 *winter vetchVicia villosa ssp. varia99 / 219
0.29r90 goldenrodSolidago californica10 / 135
0.29l91 seashore bentgrassAgrostis pallens20 / 111
0.29r92 milk maidsCardamine californica var. californica20 / 16
0.29r  (meadow-rue, Thalictrum fendleri var. polycarpum)
0.29b93 *Italian thistleCarduus pycnocephalus+20 / 221
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.
0.29r94 *little-seed canarygrassPhalaris minor1 / 12
0.29b95 deergrassMuhlenbergia rigens10 / 121
0.29r  (whorled dock, Rumex conglomeratus)
0.30c96 slender tarweedHemizonia fasciculata20 / 318
0.30l  (California squirreltail, Elymus elymoides ssp. californicus)
0.31r  (coyote bush, Baccharis pilularis)
0.32l97 fragrant everlastingGnaphalium canescens ssp. beneolens2 / 223
0.32r98 nodding needlegrassNassella cernua / 17
0.32b99 Indian milkweedAsclepias eriocarpa30 / 918
0.33l  Jct. west end of shortcut trail; continue straight.
0.33r  (laurel sumac, Malosma laurina)
0.34l  Field of purple needlegrass, Nassella pulchra; trail bends right and goes uphill.
0.36l100 blue wildryeElymus glaucus ssp. glaucus10 / 221
0.36r101 deerweedLotus scoparius var. scoparius5 / 229
0.37l102 *goldentopLamarckia aurea10 / 222
0.37   Trail bends left and soon flattens out.
0.37r103 chamiseAdenostoma fasciculatum5 / 137
0.37r104 yellow mariposa lilyCalochortus weedii var. weedii10 / 212
0.37r  (bristly bird's beak, Cordylanthus rigidus ssp. setigerus)
0.37r105 heartleaf penstemonKeckiella cordifolia1 / 128
0.37r  (golden yarrow, Eriophyllum confertiflorum var. confertiflorum)
0.37l  Begin field of Mariposa lilies, Calochortus splendens.
0.39r106 Torrey's scrub oakQuercus acutidens2 / 226
0.39r  (hollyleaf redberry, Rhamnus ilicifolia)
0.39r107 white sageSalvia apiana1 / 138
0.39r108 strigose lotusLotus strigosus10 / 133
0.39r  (rush-rose, Helianthemum scoparium)
0.40r  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?)
0.41l  (Vasey's prickly-pear, Opuntia vaseyi)
0.41l109 San Diego wreathplantStephanomeria diegensis99 / 921
0.41l  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
0.45l110 canchalaguaCentaurium venustum4 / 415
0.45r  View of white spot on hill across drainage - rock exposure?
 l111 earth brodiaeaBrodiaea terrestris ssp. kernensis20 / 17
0.46r112 *prickly sow thistleSonchus asper ssp. asper20 / 530
0.48b113 popcorn flowerCryptantha intermedia50 / 327
0.48   Trail steeply ascends edge of Mesa de Colorado.
0.48b114 caterpillar phaceliaPhacelia cicutaria var. hispida50 / 216
0.49b115 San Diego peaLathyrus vestitus var. alefeldii4 / 221
0.49   End steepest part of ascent; trail jags left
0.49r  (California sagebrush, Artemisia californica)
0.50r  (A patch of ~5 white-flowered "blue dicks" plants, Dichelostemma capitatum ssp. capitatum)
0.50b116 California oxalisOxalis albicans ssp. californica5 / 24
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
0.51b117 slim vetchVicia ludoviciana var. ludoviciana5 / 19
0.51b118 bird's-foot fernPellaea mucronata var. mucronata2 / 130
0.51l119 coast-range melicMelica imperfecta10 / 443
0.51b120 long-stemmed buckwheatEriogonum elongatum var. elongatum20 / 228
0.51r121 narrowleaf bedstrawGalium angustifolium ssp. angustifolium2 / 249
0.52b122 bush lupineLupinus excubitus var. hallii50 / 310
0.52b  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
0.53r123 lanceleaf dudleyaDudleya lanceolata1 / 120
0.55   Trail jogs right.
0.58r124 common fiddleneckAmsinckia menziesii var. intermedia5 / 115
0.58l125 bicolored everlastingGnaphalium bicolor1 / 129
0.59   Enter small grove of seven Engelmann oaks.
0.60b126 miner's lettuceClaytonia perfoliata ssp. perfoliata50 / 223
0.61   Leave small grove of Engelmann oaks; trail bends right.
0.61b127 Spanish cloverLotus purshianus var. purshianus99 / 931
0.62l128 vinegar weedTrichostema lanceolatum50 / 915
0.63b129 *grass polyLythrum hyssopifolia50 / 415
0.63c130 winged water-starwortCallitriche marginata3 / 15
0.63l131 shining peppergrassLepidium nitidum var. nitidum10 / 16
0.63l132 pygmy-weedCrassula connata20 / 128
0.63l133 *annual blue grassPoa annua20 / 212
0.63l134 purslane speedwellVeronica peregrina ssp. xalapensis3 / 13
0.63l135 *rabbits-foot grassPolypogon monspeliensis20 / 224
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.)
0.63b136 *Mediterranean barleyHordeum marinum ssp. gussoneanum20 / 16
0.64r137 ground pinkLinanthus dianthiflorus5 / 19
0.65l138 brown microserisStebbinsoseris heterocarpa / 13
0.65l  (California peony, Paeonia californica)
0.65b139 angel's giliaGilia angelensis50 / 414
0.67   Trail leaves the Mesa top briefly.
0.67 140 goldfieldsLasthenia californica5 / 112
0.68l141 prickly cryptanthaCryptantha muricata50 / 116
0.69   Local low point on trail, elevation ~2020 feet (615 m)
0.70r142 slender wreathplantStephanomeria exigua ssp. deanei2 / 114
0.71r143 California thistleCirsium occidentale var. californicum1 / 111
0.72   Trail is now back on top of the Mesa de Colorado
0.73r  (horseweed, Conyza canadensis)
0.74r  (purple head, Acourtia microcephala)
0.75r144 Vasey's prickly-pearOpuntia vaseyi1 / 124
0.75r  (California bee plant, Scrophularia californica ssp. floribunda)
0.77   Trail curves around a large Engelmann oak.
0.77r145 bajada lupineLupinus concinnus10 / 311
0.78b146 collar lupineLupinus truncatus99 / 924
0.79   Trail curves left 90°.
0.80r  (blue elderberry, Sambucus mexicana)
0.81l  Good view of Avenaloca and Redonda Mesas; (low wall made of basalt boulders)
0.86r147 laurel sumacMalosma laurina1 / 142
0.86l  (California fuchsia, Epilobium canum ssp. canum)
0.91   Minor local low point on trail where it curves right around a large coast live oak
0.93l  Trail curves right 90° near local high point on trail; elevation ~2050 feet (625 m)
0.95r  New (in 2005) big Italian thistle patch, weeded out
1.00l  Note unusual hillside location for plants normally found in drainages such as Juncus rugulosus, Lythrum hyssopifolia and Juncus bufonius
1.03l  (closest blue elderberry, Sambucus mexicana)
1.04   Local low point on trail.
1.04l148 white-flowering currantRibes indecorum2 / 222
1.07l149 coyote bushBaccharis pilularis1 / 125
1.08l150 *white-stemmed filareeErodium moschatum10 / 120
1.08   Local high point
1.08l151 horseweedConyza canadensis10 / 937
1.08l  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
1.10l152 California bee plant(dead) Scrophularia californica ssp. floribunda+5 / 117
1.10   Local low point on trail.
1.11   Local high point on trail; trail begins descent to Hidden Valley Spur Road
1.13r153 slender madiaMadia gracilis5 / 119
1.13l154 long-spurred plectritisPlectritis ciliosa ssp. insignis30 / 23
1.13b155 grand mountain dandelionAgoseris grandiflora5 / 111
1.18   Descent is now steep.
1.20r156 (dead) big squirreltail(dead) Elymus multisetus+10 / 17
1.20   Trail turns right 90°
1.21r157 golden yarrowEriophyllum confertiflorum var. confertiflorum1 / 156
1.21b158 *spring vetchVicia sativa ssp. sativa99 / 56
1.26   Huge patch of spring vetch appeared here in 2005
1.27r  (Huge circle of winter vetch, Vicia villosa ssp. varia, appeared a hundred feet from the trail here in 2003)
1.27r159 western ragweedAmbrosia psilostachya50 / 537
1.28b160 *jointed goatgrassAegilops cylindrica50 / 94
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
1.29l  (western sycamore, Platanus racemosa; big leaf mistletoe, Phoradendron macrophyllum)
1.30r161 elk thistleCirsium scariosum2 / 211
1.31l162 *Bermuda grassCynodon dactylon50 / 931
1.31b163 *sand spurreySpergularia bocconei99 / 914
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)"
1.46l  (California poppy, Eschscholzia californica)
1.46c164 rattlesnake weedChamaesyce albomarginata3 / 110
1.48c165 *knotweedPolygonum arenastrum50 / 920
1.49r166 *rose cloverTrifolium hirtum10 / 113
1.49c167 *pineapple weedChamomilla suaveolens20 / 319
1.49c168 *weak blue grassPoa infirma10 / 16
1.49   Cross small drainage
1.55r  Beautiful field of blue-eyed grass, Sisyrinchium bellum; local high point, elevation ~1940 feet (590 m)
1.61r169~California meadow barleyHordeum brachyantherum ssp. californicum10 / 13
1.62l170 mule fatBaccharis salicifolia1 / 139
1.70l  Check for different Juncus or Eleocharis
1.74r  (Small field of California poppy, Eschscholzia californica)
1.75b171 creeping wild ryeLeymus triticoides20 / 112
1.79l  Good display of bush lupine, Lupinus excubitus var. hallii
1.83r  (southern cattail, Typha domingensis; former cattle holding pen)
1.91l172 small-flowered fiddleneckAmsinckia menziesii var. menziesii10 / 28
1.91r  (Windmill)
1.93l  Jct. fenced-off old Hidden Valley Road; sign: "Hidden Valley Road (left); to Trailhead 1.3 mi (left)"
1.93l173 *horehoundMarrubium vulgare5 / 132
1.95r174 *bull thistleCirsium vulgare3 / 119
1.95l175spgoosefootChenopodium sp.1 / 1 
1.97r176 Mexican rushJuncus mexicanus20 / 116
1.97   Beginning of bridge to dross drainage; elevation ~1875 feet (570 m)
1.97l177 *whorled dockRumex conglomeratus3 / 111
1.97b178 common spikerushEleocharis macrostachya20 / 112
1.97b179 *dallis grassPaspalum dilatatum2 / 19
1.97b180 Siskiyou asterAster lanceolatus ssp. hesperius20 / 12
1.97b181 clustered field sedgeCarex praegracilis50 / 14
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.