Plant Guide to Round Valley Trail, San Jacinto Mountains

Introduction and Explanation of Plant Trail Guides

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


The guide was updated on 9 July 2017, but the rest of this page has not yet been updated.

This guide is from the Long Valley Ranger Station, elevation ~8390 feet, in Long Valley to Wellman Divide, elevation ~9720 feet, going through Round Valley. It begins 0.2 miles west of the upper Palm Springs Tramway Station. The part of this trail from the Ranger Station to Round Valley is called the Low Trail by the rangers at the State Park, with the rest of this trail called the Wellmans Divide Trail.

The trail is somewhere between 2.7 and 3.3 miles long (see below), with about 1400 total feet of elevation gain.

A free wilderness permit is required, available at the Ranger Station.

Highlights of This Trail

The botanical highlights of this trail are:

Number of Unique Taxa On This Trail

Histogram not updated to include the field work after 2007.

The following histogram gives the number of trails in our database that contain each taxon on this trail (not including the taxa seen only off-trail given at the end of the guide). We had 109 trails in our database when this histogram was made; 10 of those trails, including this one, are in this area of San Jacinto Mountain. A number of "1" means the taxon has only been found on this trail among the trails in our database; numbers of "10" or smaller may indicate taxa found only in this area of San Jacinto Mountain.

Number of Trails
Containing A Taxon
Number Of Taxa
On This Trail
% of Taxa
On This Trail
Total Taxa38100%

We found 4 additional species not in the above table, since they have not been fully identified yet. The unidentified ones are marked with ? or sp in the id? column in the guide, and have no entries in the #all column.

Fieldwork Dates and Summary of List Changes With Time

Table not updated with results after 2007.

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"

Botanical Trip Reports

7 August 2007
12 August 2007

The Plant Guide

The family order flora of this loop is given in the last column of the Flora of Long Valley, in the column with header "Lo" (for the Low trail). The linked flora is not yet updated from the 7/5/17 field work.

This version of the guide has names updated to the 2012 Jepson Manual Second Edition system; see Notes on the Scientific Names Used At This Site.

Version for printing, without lines and other text on this page: html (4 pages) or pdf Clickbook booklet (1 double-sided page without the column explanations). (See printing instructions for an explanation of these options)

The mileages in the guide come from Topo!. The total mileage is almost surely slightly underestimated, probably by no more than 10%, due to some tight switchbacks on the trail that are not accurately measured by that program. The elevations come from the topo map, and should be fairly precise.

The mileage of this trail according to Tom Harrison maps is about a half mile more than given in this guide. Further work needs to be done to see which mileage is more accurate.

MileS#id?Common NameLatin Name#here
0.00lBegin guide at sign just southwest of Ranger Station: "Round Valley Trail; Wilderness Permit Required", 0.22 miles from Tram Station; elevation ~8390 feet (2557 m).
0.00b1Jeffrey pinePinus jeffreyi50 / 9
0.00b2wild tarragonArtemisia dracunculus50 / 9
0.00r3San Jacinto buckwheatEriogonum apiculatum5 / 1
0.01l4San Gabriel beardtonguePenstemon labrosus50 / 5
0.02r5San Bernardino rubber rabbitbrushEricameria nauseosa var. bernardina+99 / 9
0.02b6white firAbies concolor99 / 9
0.05r7sugar pinePinus lambertiana50 / 9
0.06l8San Jacinto Mts. keckiellaKeckiella rothrockii var. jacintensis99 / 9
0.06l9Parish's snowberrySymphoricarpos rotundifolius var. parishii99 / 9
0.06l10western wallflowerErysimum capitatum var. capitatum10 / 2
0.06r11green-leaf manzanitaArctostaphylos patula5 / 2
0.07r12granite prickly phloxLinanthus pungens /
0.09l13Nevin's bird's beakCordylanthus nevinii10 / 1
0.09l14little-leaf mock orangePhiladelphus microphyllus /
0.12lJct. Long Valley to 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"
0.12l15Fremont's goosefootChenopodium fremontii10 / 2
0.13l16western needlegrassStipa occidentalis var. occidentalis10 / 1
0.14l17mountain California-fuchsiaEpilobium canum ssp. latifolium /
0.14r18curl-leaf mountain-mahoganyCercocarpus ledifolius /
0.14l19goldenrodSolidago velutina ssp. californica30 / 1
0.14b20Fendler's blue grassPoa fendleriana ssp. longiligula5 / 1
0.14l21Parish's bedstrawGalium parishii8 / 2
The following 6 species are near the trail in the small drainage, given in alphabetical order
0.14r22mountain rock-cressBoechera retrofracta X1 / 1
0.14l23groundsmokeGayophytum diffusum ssp. parviflorum20 / 4
0.14l24Cleveland's horkeliaHorkelia clevelandii var. clevelandii50 / 1
0.14l25Brewer's monkeyflowerMimulus breweri99 / 4
0.14l26false monkeyflowerMimulus pilosus99 / 4
0.14l27Suksdorf's monkeyflowerMimulus suksdorfii10 / 2
Back in trail order
0.15Trail begins series of minor high and low points, staying close to 8400 feet (2560 m)
0.21r28bush chinquapinChrysolepis sempervirens50 / 9
The following 25 species are in a span of ~150 feet of the Long Valley Creek drainage, given in alphabetical order
0.25l29yarrowAchillea millefolium99 / 1
0.25l30Idaho bentgrassAgrostis idahoensis40 / 2
0.25l31western columbineAquilegia formosa10 / 4
0.25l32abrupt-beak sedgeCarex abrupta10 / 1
0.25l33fragile sheath sedgeCarex fracta99 / 5
0.25l34brown sedgeCarex subfusca99 / 9
0.25l35giant red paintbrushCastilleja miniata ssp. miniata1 / 1
0.25l36slender hairgrassDeschampsia elongata10 / 1
0.25l37Nevada cinquefoilDrymocallis lactea var. lactea20 / 3
0.25l38willowherbEpilobium ciliatum5 / 1
0.25l39western marsh cudweedGnaphalium palustre20 / 2
0.25l40long-anthered rushJuncus macrandrus5 / 1
0.25l41floriferous monkeyflowerMimulus floribundus50 / 3
0.25l42primrose monkeyflowerMimulus primuloides var. primuloides20 / 1
0.25l43larger mountain monkeyflowerMimulus tilingii30 / 2
0.25l44southern mountain-monardellaMonardella australis ssp. australis20 / 4
0.25l45mat muhlyMuhlenbergia richardsonis20 / 2
0.25l46pine lousewortPedicularis semibarbata40 / 5
0.25l47mountain pink currantRibes nevadense30 / 9
0.25l48thimbleberryRubus parviflorus30 / 3
0.25l49willow-leaved dockRumex salicifolius20 / 2
0.25l50pearlwortSagina saginoides1 / 1
0.25l51Scouler's willowSalix scouleriana40 / 5
0.25l52ranger's buttonsSphenosciadium capitellatum99 / 9
0.25l53mountain carpet cloverTrifolium monanthum ssp. grantianum99 / 5
Back in trail order; the following two species are in the drainage
0.28l54brittle bladder fernCystopteris fragilis20 / 3
0.28l55snow-plantSarcodes sanguinea5 / 3
0.29l56bitter cherryPrunus emarginata10 / 2
0.33rJct. use trail to "Beach / Shangri-La"
0.33Trail turns left 90°, then right
0.33lyellow form of San Gabriel beardtongue, Penstemon labrosus
The following two species are in the drainage
0.35l57swamp sedgeCarex senta99 / 9
0.35l58tall mannagrassGlyceria elata99 / 9
0.39r59canyon live oakQuercus chrysolepis1 / 1
0.39l60western polypodyPolypodium hesperium5 / 1
0.41b61lodgepole pinePinus contorta ssp. murrayana99 / 9
0.41Cross small drainage on sturdy wooden bridge
0.41l62musk monkeyflowerMimulus moschatus99 / 9
0.47The former tight squeeze through rock walls and tree trunk here has been opened up by building up the trail surface!
0.48r63mountain whitethornCeanothus cordulatus1 / 1
0.49r64San Jacinto lupineLupinus hyacinthinus99 / 9
0.48l65wax currantRibes cereum var. cereum2 / 2
0.49l66*common cudweedPseudognaphalium luteoalbum40 / 1
0.49l67white catch-flySilene verecunda5 / 2
0.49r68mountain sprayHolodiscus discolor var. microphyllus1 / 1
0.49r69Parish's campionSilene parishii15 / 5
0.49r70western azaleaRhododendron occidentale5 / 2
0.54r71beautiful hulseaHulsea vestita ssp. callicarpha1 / 1
0.54rJct. use trail to Tamarack Campground
0.55Trail turns left to cross Long Valley Creek
0.55rSign: "Round Valley (ahead)"
0.55Cross Long Valley Creek in middle of a switchback left; elevation ~8475 feet (2583 m)
0.55l72forest goosefootChenopodium atrovirens10 / 2
0.55l73changeable phaceliaPhacelia mutabilis10 / 5
0.56First of a number of tight switchbacks; trail now climbs significantly
0.58b74Martin's paintbrushCastilleja applegatei ssp. martinii1 / 1
0.60l75pinedropsPterospora andromedea1 / 1
0.68Minor local high point
0.77r76mountain gooseberryRibes montigenum99 / 9
0.78r77limber pinePinus flexilis20 / 9
0.88Begin switchbacks on slope separating Long Valley from Round and Tamarack Valleys
0.90r(Two waterfalls)
0.90r(California corn lily, Veratrum californicum var. californicum)
0.92l78brackenPteridium aquilinum var. pubescens30 / 3
0.97l79Ross' sedgeCarex rossii20 / 5
1.01Trail is less steep for a while now
1.01rBegin small meadowy area at Round Valley Creek. The following 9 species are in a span of ~150 feet along that creek, given in alphabetical order
1.01r80purple false-giliaAllophyllum divaricatum99 / 1
1.01r81dense false-giliaAllophyllum gilioides ssp. violaceum10 / 1
1.01r82rosy everlasting, pussytoesAntennaria rosea / 1
1.01r83plain mariposa lilyCalochortus invenustus30 / 1
1.01r84toad lilyMontia chamissoi20 / 4
1.01r85Sierra nemophilaNemophila spatulata /
1.01r86Douglas' knotweedPolygonum douglasii50 / 1
1.01r87California corn lilyVeratrum californicum var. californicum99 / 9
1.01r88thyme-leaved speedwellVeronica serpyllifolia ssp. humifusa25 / 2
Back in trail order
1.05l89pussy pawsCalyptridium monospermum10 / 2
1.12r90few-flowering meadow-rueThalictrum sparsiflorum10 / 2
white bog orchidPlatanthera dilatata var. leucostachys5 / 2
1.17r91spotted coralrootCorallorhiza maculata1 / 1
1.42lJct. Round Valley to Willow Creek trail; elevation 8960 feet (2731 m); Sign: "[left] Willow Creek Trail 3.8 mi; [back] Long Valley 1.7 mi; [ahead] Round Valley 0.3 mi"
1.44r92mountain sweet-cicelyOsmorhiza berteroi10 / 2
1.52r(Begin Round Valley Meadow)
1.63b93California geraniumGeranium californicum10 / 1
1.63l94western bistortBistorta bistortoides5 / 1
1.63l95Kentucky blue grassPoa pratensis ssp. agassizensis20 / 1
1.63l96vari-nerved sedgeCarex heteroneura2 / 1
1.63l97slender buttercupRanunculus alismifolius var. alismellus10 / 1
1.64The following three species were previously found in the formerly wet drainage to the left, which was totally dry in 2017
1.64l98hairy wood rushLuzula comosa1 / 1
1.64l99small white violetViola macloskeyi5 / 1
lTrail to his and her outhouses (toilets)
1.87rNice long log for a rest stop
1.89Jct. trails to Wellman Divide (l) and Tamarack Valley (r); go left; elevation 9040 feet (2755 m). Sign: "[left] Wellman Divide 1 mi; San Jacinto Peak 3.3 mi; Saddle Junction 4.3 mi; Humber Park 6.8 mi; [right] Tamarack Valley 0.5 mi; [back] Long Valley 2.0 mi; Willow Creek 4.0 mi; Saddle Junction 5.5 mi"
1.89rTapped spring with available water (needs treatment)
2.67Wellman Divide; elevation ~9720 feet (2963 m); Sign: "[right] San Jacinto Peak 2.3 mi; [back] Round Valley 1.0 mi; Long Valley 3.0 mi"

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 or near the trail. This plant trail guide does not distinguish between on-trail and off-trail species, as long as one can easily get to the plants mentioned.

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 plants of this species on and in the vicinity of 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. Some species do not yet have abundance estimates, and other species may have much-too-low abundances, due to the guide formerly only counting plants within an arm's length of the trail.

Comments On Specific Species

Penstemon labrosus. The first specimens on the trail have the normal red flowers; there is one patch of yellow-flowered penstemons later on the trail, which are just color variants of this species. The Jepson Manual reports that this species does rarely produce yellow flowers, and we have infrequently seen such variation elsewhere at San Jacinto Mountain.

Red flowers often produce yellow variants; see Species With Color Variants.

We thank Nick Nixon for the names of the trails used by the Rangers.

We thank the following people for help with fieldwork: Eric Baecht and Pete Dodge on 8/7/07; Gabi and Cliff Mclean, and Linda and Ted St. John, on 8/12/07; Nancy Accola on 6/30/17; and Bruce Watts and Joseph Migliori on 7/5/17.

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Copyright © 2007-2017 by Tom Chester, Dave Stith, James Dillane, .
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
Updated 9 July 2017.