Plant Guide to Santa Margarita River Trail, Fallbrook, North San Diego County

This is a working list, about which we make no guarantees at all until we officially release it. Use at your own risk!

Introduction and Explanation of Plant Trail Guides

Highlights of This Trail
Fieldwork Dates and Summary of List Changes With Time
The Plant Guide
Comments On Specific Species


The trailhead is about 2 miles north of downtown Fallbrook in northwestern San Diego County. It takes about 45 minutes from I-5 / SR76 in Oceanside to drive to the trailhead, and about 30 minutes from Temecula to the trailhead.

Directions to the trailhead:

From I-15: First head to downtown Fallbrook by taking the Mission Road exit, 8 miles south of Temecula, turning west (right) on Mission Road, and following the road into town. (On the west side of the freeway, Mission Road will curve north before heading west.) You'll pass through a stoplight at Stagecoach Drive, with a "Welcome to Fallbrook Avocado Capital" sign at a real estate office, continue winding through curves, and go through another stoplight near downtown at Brandon Road and head up a small hill. On the way down from that hill, the speed limit will change to 25 mph, and you'll pass through the stoplight at Main Street. The next block also has a stoplight, Pico Avenue, with a sign "to De Luz Road".

Take Pico Avenue north from its intersection with E. Mission Road. Pico Avenue turns into De Luz Road in one block, and you descend into the Santa Margarita River canyon with ~8 curves or so, and immediately at the bottom, junction with Sandia Creek Drive on your right.

To get to the parking lot for the Santa Margarita River Trail, go right on Sandia Creek Drive (it is almost like going straight, since De Luz Road curves left there.) Follow Sandia Creek Drive for 1-2 miles along the river, and just before it curves left to cross the river on an Arizona crossing, turn right into the parking lot for the Santa Margarita River Trail. There is a stream gauge in a concrete block building with an antenna on it in the parking lot.

This trail begins on the east end of the parking lot.

From SR76: Take the S. Mission Road exit ~12 miles east of I-5 in Oceanside and head north, the only possible direction, for about 6 miles. S. Mission Road will turn 90 degrees right at the north end of downtown Fallbrook and become E. Mission Road. Turn left after one block onto Pico Avenue, and follow the above directions from there.

Highlights of This Trail

Number of Unique Taxa On This Trail

The following histogram gives the number of trails in our database that contain each taxon on this trail. We had 69 trails in my database when this histogram was made. A number of "1" means the taxon has only been found on this trail among the trails in our database.

Note that the planted species at the beginning of the trail have produced six species that are only found on this trail. We will remove the planted species from the next update of this histogram.

Number of Trails
Containing A Taxon
Number Of Taxa
On This Trail
% of Taxa
On This Trail
Total Taxa267100%

We found 9 additional species not in the above table, since they have not been identified yet. The unidentified ones are marked with ? or sp in the id? column in the guide.

Fieldwork Dates and Summary of List Changes With Time

The following table gives the dates the trail was walked and taxa recorded. After each visit, the table gives the total number of taxa on the list and the breakdown of the taxa without positive identification. See Explanation of Plant Trail Guides to understand the symbols below.

Visit DateVisit ## taxa# "?"# "sp"# "~"# "ssp"Coverage
1/14/20021     to mile 0.60
11/28/20022110211085to mile 1.30
12/1/2002312715797to mile 1.68
4/3/200342151611155to mile 1.28
5/27/20035245109172to mile 1.41
5/31/2003626178163to mile 1.30
11/25/20037276410123complete trail, mile 2.53 (265 taxa to mile 1.68)

We thank Kay Madore for her assistance on 4/3/03, and the Southern California Botanists Group on 5/31/03.

The Plant Guide

Version for printing, without lines and other text on this page: html (11 pages) or pdf Clickbook booklet (3 double-sided pages). (See printing instructions for an explanation of these options)

MileS#id?Common NameLatin Name#here#all
0.00   Gate at east end of parking lot at Sandia Creek Drive just south of its Santa Margarita River crossing.
0.00r1 *foxtail barleyHordeum murinum ssp. leporinum / 16
0.00r2 *wild oatsAvena fatua / 13
0.00r3 *Italian rye-grassLolium multiflorum / 8
0.00r4 *soft chessBromus hordeaceus / 25
0.00r5 *white-stemmed filareeErodium moschatum / 10
0.00r6 *California burcloverMedicago polymorpha / 25
0.00r7 *sourcloverMelilotus indicus10 / 511
0.00r8 canyon clarkiaClarkia epilobioides / 5
0.00r9 *pineapple weedChamomilla suaveolens / 12
0.00r10 Carolina geraniumGeranium carolinianum / 3
0.00r11 *ripgut bromeBromus diandrus / 33
0.00r12 *Crete weedHedypnois cretica / 12
0.00r13 *shortpod mustardHirschfeldia incana / 35
0.00l14 *knotweedPolygonum arenastrum / 6
0.00l15 California sagebrushArtemisia californica / 29
0.00b16 *bermuda grassCynodon dactylon / 12
0.00b17 *windmill pinkSilene gallica / 19
0.00r18 *tocaloteCentaurea melitensis / 30
0.00r  (California-aster, Lessingia filaginifolia var. filaginifolia; golden yarrow, Eriophyllum confertiflorum var. confertiflorum)
0.00   Someone has scattered seeds from a wildflower mix here; the next nine species are from those seeds.
0.00l19~*common corncockleAgrostemma githago+ / 11
0.00l20~*Spanish cockleVaccaria hispanica+ / 11
0.00l21~elegant clarkia cultivarClarkia unguiculata+ / 12
0.00l22~baby blue eyesNemophila menziesii var. menziesii+ / 18
0.00l23~*Moroccan toad-flaxLinaria maroccana+ / 11
0.00l24 *Lemon MintMonarda citriodora+ / 11
0.00r25 *bachelor's buttonCentaurea cyanus+ / 11
0.00r26 *love-in-a mistNigella damascena+ / 11
0.00r27spgarden poppy similar to Iceland poppy+1
0.00l28 *red bromeBromus madritensis ssp. rubens / 32
0.00l29 *winter vetchVicia villosa ssp. varia / 9
0.00l30 *prickly lettuceLactuca serriola / 21
0.00l31 pygmy-weedCrassula connata20 / 111
0.00l32 bur-ragweedAmbrosia acanthicarpa / 12
0.00r33 coastal goldenbushIsocoma menziesii+3 / 12
0.00l34 seaside heliotropeHeliotropium curassavicum4 / 26
0.00r  Sign: "Santa Margarita Trail, established by the Fallbrook Land Conservancy in cooperation with the Fallbrook Public Utility District, with the help of the Santa Margarita Riders. Dedicated to the memory of Irene McCullough."
0.00l35 *mouse-ear chickweedCerastium glomeratum / 11
0.00l36 *sand spurreySpergularia bocconei / 3
0.00l37 cotton-batting plantGnaphalium stramineum / 9
0.00l38 cockleburXanthium strumarium2 / 28
0.00l39 *rattail fescueVulpia myuros var. myuros / 10
0.00l40 *narrowleaf filagoFilago gallica / 27
0.00l41 California filagoFilago californica / 12
0.00l42 *sow thistleSonchus oleraceus / 20
0.00l43 *common groundselSenecio vulgaris / 11
0.00b44 purple clarkiaClarkia purpurea ssp. quadrivulnera99 / 312
0.00b45 mule fatBaccharis salicifolia20 / 326
0.00r46 *smooth cat's earHypochaeris glabra / 20
0.00r47 *long-beaked filareeErodium botrys / 4
0.00r48 *goldentopLamarckia aurea / 10
0.00r49 *rabbits-foot grassPolypogon monspeliensis5 / 210
0.00r50 *annual blue grassPoa annua / 6
0.00r51 California-asterLessingia filaginifolia var. filaginifolia5 / 233
0.00l52 *white goosefootChenopodium album2 / 111
0.00l53 horseweedConyza canadensis50 / 920
0.00r54 dwarf lupineLupinus bicolor / 17
0.00r55 wild tarragonArtemisia dracunculus+2 / 220
0.00r56 *slender wild oatsAvena barbata / 18
0.00l57 angel's giliaGilia angelensis / 5
0.00l58 California poppyEschscholzia californica / 18
0.00l59 red maidsCalandrinia ciliata / 8
0.01r60 western ragweedAmbrosia psilostachya5 / 123
0.01l61 telegraph weedHeterotheca grandiflora30 / 320
0.01l62 *Mediterranean schismusSchismus barbatus / 10
0.01r63 basketbushRhus trilobata / 14
0.01r64 fiesta flowerPholistoma auritum var. auritum99 / 99
0.01r65~common fiddleneckAmsinckia menziesii var. intermedia / 7
0.01r66 slender madiaMadia gracilis10 / 17
0.01r  (blue dicks, Dichelostemma capitatum ssp. capitatum)
0.01r67 giant wild ryeLeymus condensatus50 / 922
0.01r  (southern honeysuckle, Lonicera subspicata var. denudata)
0.01r68 *Bermuda buttercupOxalis pes-caprae20 / 35
0.02r  (heartleaf penstemon, Keckiella cordifolia)
0.02l  (California buckwheat, Eriogonum fasciculatum var. foliolosum)
0.02r69 wild-cucumberMarah macrocarpus var. macrocarpus30 / 929
0.02r70 coast live oakQuercus agrifolia var. agrifolia99 / 929
0.02r  (toyon, Heteromeles arbutifolia, and branching phacelia, Phacelia ramosissima var. latifolia)
0.03r  (blue elderberry, Sambucus mexicana)
0.04r  Telephone pole
0.04l  Trail junction; horses go left and cross river; continue straight.
0.04l  (red willow, Salix laevigata, and narrowleaf willow, Salix exigua, behind it.)
0.04b71 branching phaceliaPhacelia ramosissima var. latifolia99 / 919
0.04b72 small wirelettuceStephanomeria exigua ssp. deanei+99 / 96
 r73 south coast morning-gloryCalystegia macrostegia ssp. intermedia3 / 310
0.04r74 poison oakToxicodendron diversilobum99 / 928
 r75 *Italian thistleCarduus pycnocephalus50 / 38
0.06l76 collar lupineLupinus truncatus / 15
0.06r77 eucryptaEucrypta chrysanthemifolia var. chrysanthemifolia / 13
0.06l78 narrow-leaved miner's lettuceClaytonia parviflora ssp. parviflora / 8
0.06l79 desert wild grapeVitis girdiana50 / 97
0.06l80 wild canterbury bellsPhacelia minor / 12
0.06l  (western sycamore, Platanus racemosa)
0.06l81 *purple wild radishRaphanus sativus / 9
0.06l82 caterpillar phaceliaPhacelia cicutaria var. hispida99 / 98
0.06l83 *London rocketSisymbrium irio / 6
0.06r84 mugwortArtemisia douglasiana30 / 922
0.06l85 common bedstrawGalium aparine / 19
0.06l86 *white sweetcloverMelilotus albus10 / 55
0.06r87 California wild roseRosa californica20 / 69
0.07r88 California blackberryRubus ursinus99 / 911
0.07r89 heartleaf penstemonKeckiella cordifolia20 / 518
0.07r90 sacapelloteAcourtia microcephala / 11
0.07r91 *hedge mustardSisymbrium officinale / 12
0.07r92 *field hedge-parsleyTorilis arvensis / 3
0.07r93 hollyleaf redberryRhamnus ilicifolia20 / 929
0.07l94 red willowSalix laevigata2 / 214
0.07r95?unk baby plant with lvs like bindweed
0.07r96 white nightshadeSolanum douglasii30 / 911
0.08l97 Hooker's evening-primroseOenothera elata ssp. hirsutissima10 / 13
0.08r98 *four-leaf polycarpPolycarpon tetraphyllum / 6
0.08r99 *common chickweedStellaria media / 15
0.08r100 *petty spurgeEuphorbia peplus / 6
0.08l101 hairy sand verbenaAbronia villosa var. aurita1 / 12
0.09l102 western sycamorePlatanus racemosa20 / 916
0.09l103 chaparral bush mallowMalacothamnus fasciculatus20 / 98
0.09b104~*curly dockRumex crispus / 13
0.09r105 *scarlet pimpernelAnagallis arvensis / 16
0.09l106 *poison hemlockConium maculatum99 / 35
0.09r  Small gully
0.11r107 creeping wild ryeLeymus triticoides5 / 15
0.11r108 purple snapdragonAntirrhinum nuttallianum ssp. nuttallianum / 8
0.11r109 pellitoryParietaria hespera var. hespera / 2
0.12r  (nit grass, Gastridium ventricosum)
0.13r110 *milk thistleSilybum marianum20 / 18
0.13l111 blue elderberrySambucus mexicana10 / 933
0.13r112 *cheeseweedMalva parviflora / 11
0.13   Go up very small rise.
0.13l113 one-sided bluegrassPoa secunda ssp. secunda / 19
0.13r114 *henbitLamium amplexicaule / 7
0.14r  (sacred datura, Datura wrightii)
0.14l115 *giant reedArundo donax+1 / 16
0.14l116 narrowleaf bedstrawGalium angustifolium ssp. angustifolium20 / 935
0.16l117 *fennelFoeniculum vulgare2 / 111
0.16r  (small-flowered nightshade, Solanum americanum)
0.16r118 blue dicksDichelostemma capitatum ssp. capitatum / 26
0.16r119 slim vetchVicia ludoviciana var. ludoviciana / 4
0.16r120 silver puffsUropappus lindleyi / 16
0.16l121 black cottonwoodPopulus balsamifera ssp. trichocarpa20 / 37
0.16   Enter bouldery section.
0.16r122 giant needlegrassAchnatherum coronatum20 / 315
0.16r  (saw-toothed goldenbush, Hazardia squarrosa var. grindelioides)
0.16r123 bush monkeyflowerMimulus aurantiacus10 / 327
0.16r124 white sageSalvia apiana20 / 325
0.16r125 small-flowered melicaMelica imperfecta / 24
0.16r126 threadstemPterostegia drymarioides / 13
0.16r127 California chalk lettuceDudleya pulverulenta ssp. pulverulenta20 / 37
0.16r128 California buckwheatEriogonum fasciculatum var. foliolosum10 / 335
0.16r129 golden yarrowEriophyllum confertiflorum var. confertiflorum / 35
0.16r130 tomcat cloverTrifolium willdenovii / 8
0.16r131 long-stemmed buckwheatEriogonum elongatum var. elongatum5 / 215
0.16r132 California suncupCamissonia californica / 12
0.16l133 arroyo willowSalix lasiolepis5 / 324
0.16r134sspshort-winged deerweedLotus scoparius var. brevialatus10 / 312
0.16r135 California brickellbushBrickellia californica10 / 220
0.17   Trail used to split here briefly; go right on the upper trail. The lower trail is now overgrown.
0.17l  (oleander, Nerium oleander)
0.17r136 popcorn flowerCryptantha intermedia / 17
 r137 California mustardGuillenia lasiophylla / 4
 r138 goldback fernPentagramma triangularis ssp. triangularis10 / 511
0.18b139 white everlastingGnaphalium canescens ssp. microcephalum10 / 529
0.18r140 Bishop's lotusLotus strigosus / 18
0.18r141 San Diego morning-gloryCalystegia macrostegia ssp. tenuifolia3 / 315
0.18 142 chiaSalvia columbariae / 15
0.18r143 Bigelow's spike-mossSelaginella bigelovii / 12
0.18r144 coffee fernPellaea andromedifolia20 / 916
0.18r145 lace-podThysanocarpus laciniatus / 4
0.18r146 cotton fernCheilanthes newberryi50 / 53
0.18l147 Fremont cottonwoodPopulus fremontii ssp. fremontii1 / 18
 r  liverworts with fruiting bodies on a 3 cm stem.
 r148 yellow pincushionChaenactis glabriuscula var. glabriuscula / 10
 r149 California thistleCirsium occidentale var. californicum / 8
0.20   Short steep descent of a few steps to junction with former lower trail; continue rightish along the trail.
0.20r150 sweetbushBebbia juncea var. aspera3 / 16
0.20r151 Coulter's lupineLupinus sparsiflorus / 7
0.21r152 three spotOsmadenia tenella5 / 16
0.22r153 bicolored everlastingGnaphalium bicolor20 / 317
0.22   Jct. path to water on left; go right on trail which enters a brief up and down eroded area - watch your footing and stay on upper path whenever there appears to be a choice.
0.23l154 California bromeBromus carinatus var. carinatus5 / 110
0.23l155 *creeping Australian saltbushAtriplex semibaccata1 / 19
0.24r  (leafy daisy, Erigeron foliosus var. foliosus)
0.24l156 meally white pincushionChaenactis artemisiifolia / 5
0.24r157 saw-toothed goldenbushHazardia squarrosa var. grindelioides20 / 523
0.24r158 San Diego peaLathyrus vestitus var. alefeldii / 12
0.24r159 bird's-foot fernPellaea mucronata var. mucronata / 18
0.25   End bouldery section. Trail is now dead flat.
0.25r  A number of "core boulders" are eroding out of the rock on the cliff.
0.25r160 leafy daisyErigeron foliosus var. foliosus / 27
0.27l161 *Australian brass-buttonsCotula australis / 9
0.27l162 coyote bushBaccharis pilularis1 / 117
0.28l163 globe giliaGilia capitata ssp. abrotanifolia / 3
0.28r  More core boulders.
0.29l164 purple owl's cloverCastilleja exserta ssp. exserta / 6
0.30r165 wide-throated yellow monkeyflowerMimulus brevipes / 5
0.30l  80 cm purple owl's clover!
0.30r  Hillside of fiesta flower and blue larkspur.
0.30r166 Ramona clarkiaClarkia similis20 / 51
0.30   Enter shade again.
0.30 167 *bull thistleCirsium vulgare / 9
0.30l168 red goosefootChenopodium rubrum5 / 13
0.32l169 rattlesnake weedDaucus pusillus20 / 512
0.32r170 *sweet alyssumLobularia maritima2 / 13
0.32   Bedded river deposits seen just ahead on left. Note the soot layer 90 cm down, which is either from a long-ago fire, or from an organic layer which burned in February 2002. This is getting harder to see as vegetation regrows.
0.32   Four massive western sycamores that survived the 2002 fire.
0.33r171 meadow-rueThalictrum fendleri var. polycarpum20 / 51
0.33r172spsticky false-giliaAllophyllum glutinosum3 / 15
0.33   Enter "spooky forest".
0.33 173 California wood fernDryopteris arguta20 / 57
0.35   Cross dry drainage.
0.36   Horse Trail rejoins path, from left; continue straight.
0.37r174 common monkeyflowerMimulus guttatus2 / 16
0.37r175?unk per with elliptic 85 x 35 mm lvs, including a petiole of 20 mm, in 'cauline rosettes'. Pix.
0.38r  Jct. brief alternate path to avoid mud in main trail.
0.38l176 canyon sunflowerVenegasia carpesioides5 / 11
0.39b177 *freeway daisyOsteospermum fruticosum3 / 11
0.39r178 Chinese housesCollinsia heterophylla50 / 510
0.39r  Alternate path rejoins main trail.
0.39r179 *smilo grassPiptatherum miliaceum50 / 514
0.40r180 southern Indian pinkSilene laciniata ssp. major / 10
0.40b181 Venus looking-glassTriodanis biflora5 / 21
0.40r182 *pokeweedPhytolacca americana5 / 21
0.40r183 *tree tobaccoNicotiana glauca5 / 212
 l  (ear drops, Dicentra chrysantha formerly at this location.
0.41l184 California fuchsiaEpilobium canum ssp. canum1 / 110
0.41r  (Check vetch here for Vicia hassei, with fls well separated.)
0.42r185 tree cloverTrifolium ciliolatum / 6
0.42r186 southern honeysuckleLonicera subspicata var. denudata30 / 527
0.42b187 *castor beanRicinus communis5 / 212
0.42   Trail rerouted a bit upstream and crossing improved in early 2003; cross dry drainage.
0.42r  (California chicory, Rafinesquia californica)
0.43r188 Fish's milkwortPolygala cornuta var. fishiae99 / 92
0.44l  Jct. steep path to river; stay right.
0.47r  Note boulder that fell down from an obvious location just above it.
    Large sinkhole in trail near here in early 2003.
0.47r189 blue wildryeElymus glaucus ssp. glaucus5 / 115
0.47r190 *common cudweedGnaphalium luteo-album1 / 15
0.47r191 *brome fescueVulpia bromoides / 3
0.49r192 California everlastingGnaphalium californicum20 / 522
0.49r193 San Diego mountain mahoganyCercocarpus minutiflorus30 / 97
0.49r194 willowherbEpilobium ciliatum ssp. ciliatum5 / 114
0.49r195 annual sunflowerHelianthus annuus / 8
0.49r196 hollyleaf cherryPrunus ilicifolia ssp. ilicifolia5 / 38
0.50r197 coast jepsoniaJepsonia parryi30 / 18
 r198 small-flowered meconellaMeconella denticulata2 / 21
0.50r199 goldenstarBloomeria crocea5 / 16
0.50r200spwoodland starLithophragma affine5 / 13
0.51 201~saltgrassDistichlis spicata+ / 9
0.51r202 lanceleaf dudleyaDudleya lanceolata30 / 315
0.52r203 California polypodyPolypodium californicum / 10
0.53l204 *blessed thistleCnicus benedictus10 / 21
0.54r205 blue larkspurDelphinium parryi ssp. parryi30 / 95
 r206 minute-flowered cryptanthaCryptantha micromeres3 / 13
0.55r  Jct. big road; stay left.
0.55r207 Parish's purple nightshadeSolanum parishii30 / 510
0.56l208 small-flowered nightshadeSolanum americanum5 / 22
0.56l209 stinging nettleUrtica dioica ssp. holosericea5 / 28
0.56   Cross stream.
0.56r210~water cressRorippa nasturtium-aquaticum+5 / 28
0.56r211 *gopher plantEuphorbia lathyris+3 / 11
0.58r  Jct. big road (other terminus of road at mile 0.55); stay left.
0.59r212 whispering bellsEmmenanthe penduliflora var. penduliflora / 5
0.62r213 golden ear dropsDicentra chrysantha30 / 24
0.64l  Jct. path to water.
0.65 214sp*water speedwellVeronica anagallis-aquatica / 1
0.68r215 black-hair nettleHesperocnide tenella1 / 12
0.69l216 cobwebby thistleCirsium occidentale var. occidentale / 4
 b217 *English plantainPlantago lanceolata / 13
0.70r218 *little horseweedConyza bonariensis / 10
0.72l219 California crotonCroton californicus20 / 54
0.72l  wild tarragonArtemisia dracunculus /  
0.72r  Jct. big road; stay left.
0.72b220 dove weedEremocarpus setigerus20 / 310
0.72r221 Indian tobaccoNicotiana quadrivalvis1 / 11
0.73l222 San Diego birdsfoot lotusLotus hamatus / 7
0.74r223 Pacific sanicleSanicula crassicaulis20 / 39
0.74l224 triangular-fruit sedgeCarex triquetra10 / 110
0.80l225 toyonHeteromeles arbutifolia3 / 333
0.80 226 hoaryleaf ceanothusCeanothus crassifolius+5 / 310
0.80 227sspCalifornia oxalisOxalis albicans4 / 21
0.81l  A single small wirelettuce, Stephanomeria exigua ssp. deanei, with bright pink flowers. All the rest on the trail have pure white flowers.
0.81   Jct. path to water on left; go right on trail.
0.82 228spvirgin's bowerClematis pauciflora20 / 57
0.84l  Jct. road cut through hill.
0.84l229 *lesser swine cressCoronopus didymus2 / 12
0.87r  Fencepost inside large pipe - property line marker?
0.89l230spTwo baby pines planted in fall 2003.Pinus sp.+2 / 1 
0.89   Trail splits; only horses to left; hikers and horses to right; go right.
0.91   Jct. path to right.
0.92l231~Vasey's prickly pearOpuntia Xvaseyi2 / 214
0.93l232 climbing bedstrawGalium nuttallii ssp. nuttallii / 13
0.99   Begin bouldery section again.
1.00r233 stinging lupineLupinus hirsutissimus / 10
1.00 234 California lace fernAspidotis californica5 / 13
1.03   Trail junction; go right (left to river crossing)
1.03   Cross drainage.
1.03l235 chaparral yuccaYucca whipplei30 / 513
1.08r236 ocellated Humboldt lilyLilium humboldtii ssp. ocellatum1 / 12
1.08   Trail jags right.
1.08r  Second small-flowered meconella, Meconella denticulata.
1.08r237 California maidenhair fernAdiantum jordanii1 / 16
 r238 California chicoryRafinesquia californica5 / 114
1.09r239~Spanish cloverLotus purshianus var. purshianus / 14
1.10r240 miner's lettuceClaytonia perfoliata ssp. perfoliata / 12
1.10r  Best area for California wood fern, Dryopteris arguta.
1.11r241 sugar bushRhus ovata20 / 516
1.13   Look at the beautiful boulders upstream, and then cross dry drainage.
1.15r  Bench without a back.
1.16l242 *nit grassGastridium ventricosum / 13
1.18   Sign: "Crossing [left]; Trail [rightish]". Go rightish on the much-improved-in-late-2003 trail.
1.21l243 chamiseAdenostoma fasciculatum20 / 524
 l244 yellow mariposa lilyCalochortus weedii var. weedii / 6
1.22l245~intermediate sun-cupsCamissonia intermedia5 / 21
1.22l  wide-throated yellow monkeyflowerMimulus brevipes /  
1.22r  Huge field of golden ear drops, Dicentra chrysantha.
1.22   Jct. dirt road. Go right, uphill, and turn left at the Y-jct, noted below, when you are just below the driveway to the house on the right of the dirt road.
1.23r  (twiggy wreath plant, Stephanomeria virgata)
1.24l  short-winged deerweedLotus scoparius var. brevialatus /  
1.24l246 fringed spineflowerChorizanthe fimbriata var. fimbriata / 4
1.25l247 Eastwood manzanitaArctostaphylos glandulosa ssp. zacaensis5 / 26
1.25l248 *staticeLimonium sinuatum10 / 11
1.25r249 Coulter's snapdragonAntirrhinum coulterianum1 / 12
1.25r250 Jurupa Hills sun-cupsCamissonia ignota5 / 14
1.27   Turn around and see top of Rock Mountain peeking above ridgeline to north. Gavilan Mountain is the ridgeline to its east.
1.28   Y-jct. Take trail to left.
1.28l  Jct. Ridgetop Trail; sign dead ahead: "Hikers and Horses". Take a brief excursion on the Ridgetop Trail to see the following species:
  251ssphooked skunkweedNavarretia hamata ssp. hamata10 / 13
  252 sapphire woolly-starEriastrum sapphirinum10 / 12
  253 prostrate spineflowerChorizanthe procumbens5 / 11
  254 rockroseHelianthemum scoparium5 / 18
1.29 255 comb-leaved nemacladusNemacladus pinnatifidus5 / 11
1.30   Back at main trail, turn left at sign: "hikers, horses" with directional arrows along trail.
1.30l256 laurel sumacMalosma laurina5 / 225
1.31r257 mission manzanitaXylococcus bicolor10 / 38
1.35l258 odoraPorophyllum gracile2 / 14
1.38r259 black sageSalvia mellifera10 / 326
1.38   Y-jct. Go left.
1.40   Jct. road / path on left. Continue straight.
1.41r260spsedgeCarex sp.20 / 2 
1.41r261spgreen dock?Rumex sp. /  
1.41   Cross stream. (Check for Rorippa here, as first occurrence now.)
1.41l262 *dallis grassPaspalum dilatatum4 / 14
1.41r263 umbrella sedgeCyperus eragrostis5 / 13
1.41r264 canyon dodderCuscuta subinclusa1 / 11
1.45   The steep cut on the right is the firebreak marking the easternmost extent of the 2002 fire, marking the end of the burned area.
1.48   Woodrat's nest high in tree on right.
1.49   Trail curves right 90°.
1.50   T-jct, go left (right branch leads to "Sand Pit" and 500 foot trail).
1.53   virgin's bowerClematis pauciflora /  
1.55   Cross dry drainage.
1.56r265 scrub oak X Engelmann oakQuercus berberidifolia X Q. engelmannii3 / 311
1.61   Local high point on trail.
1.66   California oxalisOxalis albicans /  
1.68   Trail jags left into sandy region.
1.73   Local low point on trail; trail leaves sandy region.
1.76   Cross dry drainage.
1.83   Cross dry drainage.
1.84l  hoaryleaf ceanothusCeanothus crassifolius /  
1.85r266 stinking gourdCucurbita foetidissima5 / 15
1.89   Beginning here, the small wirelettuce, Stephanomeria exigua ssp. deanei, has predominantly 7-8 flowers per head and is taller than the previous plants.
2.00r267 Davidson's buckwheatEriogonum davidsonii5 / 215
2.03   Local high point on trail.
2.09l268 Torrey's hybrid oakQuercus Xacutidens1 / 14
2.11   Trail curves left 90°
2.15   T-jct; go right (left trail leads to river crossing).
2.19l  Another candidate for saltgrass
2.24r269sp*saltcedarTamarix ramosissima3 / 13
2.24l270 *mission cactusOpuntia ficus-indica3 / 14
2.28r  Jct. Rainbow Creek Trail; stay left
2.30   Trail curves left 90° and crosses Rainbow Creek.
2.31l271sprush 6-12 feet tallJuncus sp.10 / 1 
2.33   Trail makes long curve left 90°
2.37   Trail makes long curve right 90°
2.40r  Grinding stone rock; jct. steep path uphill.
2.42l272?black locust?Robinia pseudoacacia?+8 / 1 
2.44l273?Tree with long seed pods like catalpa, 30 cm x 13 mm, dehiscent at end.+11
2.48r274 sacred daturaDatura wrightii1 / 112
2.48r275 *horehoundMarrubium vulgare3 / 117
2.49l  Jct. trail to river crossing.
2.51r276 *Peruvian pepper treeSchinus molle1 / 15
2.53   End trail at locked gate at the jct. of Willow Glen Road and North Stagecoach Lane. Turnaround and retrace your steps to the trailhead.

Comments On Specific Species

Various species. These are all species which have been planted here.

Isocoma menziesii. Distinguishing var. menziesii from var. vernonioides seems problematic using either the Munz key or the JM key. See Comments on the Jepson Manual and A Flora of Southern California by Munz.

Artemisia dracunculus, Ceanothus crassifolius. The first occurrence of each of these species died from the February 2002 fire. That first occurrence remains in the guide, but the first occurrence in 2003 is also given.

Stephanomeria exigua ssp. deanei. There appear to be two races on this trail. The plants from mile 0.0 to mile 1.3 have mostly 5-6 flowers per head. The plants around mile 2.0 have mostly 7-8 flowers per head. See Stephanomeria exigua ssp. deanei.
All blooms are pure white, except for a single plant at mile 0.81, which has bright pink flowers, and is growing immediately next to a normal plant with white flowers.

Distichlis spicata, Rorippa nasturtium-aquaticum, Euphorbia lathyris. The first occurrence of these species was gone in late 2003. The second occurrence is noted if one is present.

Arundo donax. This plant was killed in 2002 as part of the 5 year program to remove Arundo from the Santa Margarita River watershed.

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Copyright © 2002-2004 by Tom Chester and Jane Strong.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Tom Chester | Jane Strong
Updated 10 March 2004 (directions and travel times to trailhead updated 10 December 2007; booklet print version added 5 December 2010)