Plant Guide to Round Valley Loop Trail, San Jacinto Mountains

MileS#id?Common NameLatin Name#here
0.00Begin guide at Willow Creek Trail jct. with Round Valley Trail 0.12 miles west of Ranger Station; elevation 8400 feet (2560 m); go left on Willow Creek Trail. Sign: "[left] Willow Creek 3.7 mi; Skunk Cabbage Meadow 5 mi; Idyllwild 10.5 mi; [ahead] Long Valley; Round Valley 2 mi; Saddle Junction 5.5 mi; [back] Tramway 0.3 mi"
0.00r1sugar pinePinus lambertiana20 / 9
0.00b2white firAbies concolor99 / 9
0.00b3Parish's snowberrySymphoricarpos rotundifolius var. parishii99 / 9
0.00l4San Jacinto Mts. keckiellaKeckiella rothrockii var. jacintensis99 / 9
0.00b5San Bernardino rubber rabbitbrushEricameria nauseosa var. bernardina99 / 9
0.00b6western needlegrassStipa occidentalis var. occidentalis50 / 2
0.00r7goldenrodSolidago velutina ssp. californica10 / 1
0.00l8mountain sprayHolodiscus discolor var. microphyllus15 / 1
The next five species are In the drainage to the right of the trail:
0.00r9pinegrove groundsmokeGayophytum oligospermum99 / 9
0.00r10Cleveland's horkeliaHorkelia clevelandii var. clevelandii50 / 2
0.00r11Brewer's monkeyflowerMimulus breweri99 / 2
0.00r12false monkeyflowerMimulus pilosus99 / 2
0.00r13Suksdorf's monkeyflowerMimulus suksdorfii50 / 1
Back on trail
0.00b14little-leaf mock orangePhiladelphus microphyllus20 / 4
0.01r15Jeffrey pinePinus jeffreyi50 / 9
0.01l16Parish's bedstrawGalium parishii15 / 2
0.02l17granite prickly phloxLinanthus pungens50 / 2
0.02l18mountain California-fuchsiaEpilobium canum ssp. latifolium99 / 1
0.02r19prickly hawkweedHieracium horridum3 / 2
0.02r20fringed bromeBromus richardsonii1 / 1
0.02r21sticky cinquefoilDrymocallis glandulosa var. viscida20 / 2
0.02r22brown sedgeCarex subfusca99 / 3
0.02r23squirreltailElymus elymoides5 / 2
0.02rCheck for Carex rossii
0.03r24canyon live oakQuercus chrysolepis1 / 1
0.03l25wax currantRibes cereum var. cereum2 / 1
0.04r26Scouler's willowSalix scouleriana10 / 2
0.04Jct. new trail; jog right across it on new boardwalk that crosses a small drainage
0.07l27wild tarragonArtemisia dracunculus50 / 9
Jct. with north fork of Long Valley Creek, coming from Round and Tamarack Valleys. The following 21 species are in the creek area within 100 feet or so of the trail, given in alphabetical order:
0.08l28yarrowAchillea millefolium99 / 1
0.08b29Idaho bentgrassAgrostis idahoensis99 / 1
0.08l30western columbineAquilegia formosa1 / 1
0.08l31abrupt-beak sedgeCarex abrupta25 / 1
0.08l32fragile sheath sedgeCarex fracta1 / 1
0.08l33Martin's paintbrushCastilleja applegatei ssp. martinii6 / 2
0.08r34brittle bladder fernCystopteris fragilis2 / 1
0.08l35Nevada cinquefoilDrymocallis lactea var. lactea99 / 1
0.08l36willowherbEpilobium ciliatum10 / 1
0.08l37western wallflowerErysimum capitatum var. capitatum99 / 3
0.08l38toad rushJuncus bufonius99 / 1
0.08l39long-anthered rushJuncus macrandrus2 / 1
0.08l40floriferous monkeyflowerMimulus floribundus99 / 1
0.08r41musk monkeyflowerMimulus moschatus20 / 1
0.08b42primrose monkeyflowerMimulus primuloides var. primuloides99 / 1
0.08l43larger mountain monkeyflowerMimulus tilingii20 / 1
0.08l44San Gabriel beardtonguePenstemon labrosus10 / 1
0.08l45pearlwortSagina saginoides1 / 1
0.08r46snow-plantSarcodes sanguinea4 / 4
0.08l47ranger's buttonsSphenosciadium capitellatum / 1
0.08l48thyme-leaved speedwellVeronica serpyllifolia ssp. humifusa10 / 1
0.08Check for Deschampsia elongata and Thalictrum fendleri
0.08Now back on trail in trail order; cross creek on wood plank bridge
0.11rSign: "Permit required"
0.12Small switchback right
0.12r49lodgepole pinePinus contorta ssp. murrayana99 / 9
0.12b50Parish's campionSilene parishii35 / 3
0.12Small switchback left
0.14b51San Jacinto lupineLupinus hyacinthinus99 / 9
0.15Switchback right
0.24Trail turns left 90°
0.25Switchback right
0.26Switchback left
0.26r52bush chinquapinChrysolepis sempervirens65 / 9
0.28Four switchbacks in next 0.04 miles
0.29l53Ross' sedgeCarex rossii75 / 9
0.34b54Nevin's bird's beakCordylanthus nevinii99 / 1
0.35Trail zigzags up
0.35r55pine lousewortPedicularis semibarbata99 / 2
0.47Trail enters large flattish area extending for 1/4 mile
0.4756pussy pawsCalyptridium monospermum99 / 1
0.47l57San Jacinto Mtns. daisyErigeron breweri var. jacinteus99 / 2
0.48r58curl-leaf mountain-mahoganyCercocarpus ledifolius20 /
The following three species are in the flat area to the left:
59green-leaf manzanitaArctostaphylos patula2 / 1
60mountain red-root cryptanthaCryptantha micrantha var. lepida / 1
61mountain whitethornCeanothus cordulatus3 / 3
Back on trail
0.58b62plain mariposa lilyCalochortus invenustus2 / 1
0.58Cross small drainage
0.59r63white catch-flySilene verecunda10 / 2
0.63Cross western branch of south fork of Long Valley Creek, a very minor drainage here; trail resumes going up
0.65r64spotted coralrootCorallorhiza maculata1 / 1
0.81rJct. high Round Valley Trail; go right. Sign: "[ahead] Willow Creek 2.7 mi; Saddle Junction 4.8 mi; Humber Park 6.8 mi; [back] Long Valley 1 mi; Tram 1.3 mi; [right] Round Valley 2 mi; San Jacinto Peak 5.5 mi". Hidden Divide is 0.29 miles straight ahead if you want a side excursion.
1.05l65Southern California rock drabaDraba saxosa36 / 1
1.12Cross same western branch of south branch of Long Valley Creek at higher elevation
1.22rConcrete post
1.35b66dusky onionAllium campanulatum99 / 4
1.40rone-sided bluegrassPoa secunda ssp. secunda /
1.45l(Burlew's onion, Allium burlewii; southern mountain-monardella, Monardella australis ssp. australis, several hundred feet to left)
1.4867Burlew's onionAllium burlewii99 / 3
1.50Now in another flattish area, the higher elevation extension of the previous flattish area
1.60r(rosy everlasting, pussytoes, Antennaria rosea)
1.74l68rosy everlasting, pussytoesAntennaria rosea2 / 1
1.79High point on route, elevation ~8980 feet (2737 m)
1.92r69mountain gooseberryRibes montigenum9 / 1
1.93Jct. low Round Valley Trail; end guide; go right to return to Tram Station
3.44Ranger Station

Mile: 0.00 includes all mileages from 0.000 to 0.009; etc.

S: Side of trail on which the first occurrence is found: left, right, both, or center

#: Species are numbered in order of first occurrence on trail. Unlike most of our plant trail guides, off-trail species are numbered as long as they are easily reachable from the trail. Species that are not visible from the trail, or are difficult to reach, are in parentheses.

id?: Species without an entry in this column are positively identified. "?" means we are just guessing the identification; "sp" means the genera is probably known, but the species name is uncertain; "~" means we have 95% confidence that this is the determination, but have not yet positively identified it; "ssp" means the subspecies or variety needs to be determined.

#here gives the minimum number of on-trail plants of this species on this trail, with the number of locations on this trail following the /, using maximum values of 99/9. 1/1 means a single plant in a single location; 10/9 means 10 plants occurring in at least 9 locations, etc.
Updated 29 June 2017.