Plant Guide to PCT East of Blue Ridge Summit

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

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

Introduction

Directions to Trailhead: Park at the Blue Ridge Summit PCT Parking Area at milepost LA78.10 on the Angeles Crest Highway (ACH). Toilets are located in this parking lot; across ACH is another parking lot for Inspiration Point. Walk carefully across ACH to the east to the beginning of the Blue Ridge Road. The trail is immediately on the left at the beginning of the Road. At the trailhead is a large sign saying "PCT Parking" with a left arrow pointing to the parking area where you parked your car.

Highlights of This Trail

Botanical highlights of this trail include:

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 79 trails in our database when this histogram was made; two trails, including this one, are in this immediate area of the San Gabriel Mountains, with another three trails 2.4 miles west at Vincent Gap. A number of "1" means the taxon has only been found on this trail among the trails in our database; numbers of "5" or smaller may indicate taxa found only in this general area of the San Gabriel Mountains.

Number of Trails
Containing A Taxon
Number Of Taxa
On This Trail
% of Taxa
On This Trail
178%
267%
333%
4910%
556%
 
1-53034%
6-102528%
11-151517%
16-2067%
21-2578%
26-3000%
31-3511%
36-4022%
41-4511%
46-5011%
Total Taxa88100%

We found 2 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, and do not have any number given in the #all column.

The species unique to this trail, along with those found on only a single other trail, are:

# allLatin NameCommon Name
1Arabis pulchra var. pulchrabeautiful rock-cress
1Galium bifoliumlow mountain bedstraw
1Lupinus arbustusspur lupine
1Lupinus excubitus var. johnstoniiinterior bush lupine
1Orobanche fasciculataclustered broom-rape
1Stephanomeria exigua ssp. coronariaslender wreathplant
1Stephanomeria spinosathorny skeleton-plant
2Allophyllum integrifoliumwhite false-gilia
2Delphinium parishii ssp. parishiiParish's larkspur
2Eriastrum sapphirinumsapphire woolly-star
2Lewisia redivivabitter root
2Phacelia mutabilischangeable phacelia
2Phlox austromontanasouthern mountain phlox
2Ribes lasianthum+alpine gooseberry

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"
6/26/200318821084
9/23/20042901281
9/26/20043901161

Only the first 0.23 miles was covered on 9/26/04.

In addition to the visits above, Jane has made a number of visits to this trail previously without recording all the taxa.

The Plant Guide

Version for printing, without lines and other text on this page (4 pages)

The mileages below have not yet been done reliably. No mileages were recorded in the first fieldwork, and hence the location of some plants found later is uncertain relative to some of those plants. Raw mileages obtained on 9/23/04 and 9/25/04 have been rectified to values obtained from the USGS topographic map at miles 0.28, 0.44, 0.81, and 1.63.

MileS#id?Common NameLatin Name#here#all
0.00   Begin PCT east at Angeles Crest Highway and Blue Ridge Road, elevation 7340 feet (2235 m).
0.00l1 mountain sagebrushArtemisia tridentata ssp. vaseyana99 / 98
0.00r2 *tumble-mustardSisymbrium altissimum99 / 99
0.00l  Sign: "PCT Parking [left arrow]"
0.00l3 *intermediate wheatgrassElytrigia intermedia ssp. intermedia10 / 43
0.00b4 Orcutt's bromeBromus orcuttianus20 / 96
0.00r5 bur-ragweedAmbrosia acanthicarpa5 / 214
0.00b6 *downy bromeBromus tectorum99 / 921
0.00r7 bitter cherryPrunus emarginata99 / 95
0.00r8 white firAbies concolor / 20
0.00r9~alpine gooseberryRibes lasianthum+2 / 22
0.00l10 plain mariposa lilyCalochortus invenustus / 7
0.00l11 western morning-gloryCalystegia occidentalis ssp. fulcrata / 7
0.00l12 threadleaf common rabbitbrushChrysothamnus nauseosus ssp. consimilis20 / 56
0.00l13 leafy daisyErigeron foliosus var. foliosus50 / 934
0.00l  PCT post.
0.00l14 Jeffrey pinePinus jeffreyi50 / 921
0.01b15 San Bernardino rubber rabbitbrushChrysothamnus nauseosus ssp. bernardinus20 / 514
0.01l16 spineless horsebrushTetradymia canescens99 / 95
0.01l17 interior bush lupineLupinus excubitus var. johnstonii20 / 91
0.01l  (one-sided bluegrass, Poa secunda ssp. secunda)
0.01r18 Fremont's goosefootChenopodium fremontii20 / 310
0.01r19sspsquirreltailElymus elymoides ssp. elymoides30 / 94
0.01r  (sulphur buckwheat, Eriogonum umbellatum var. munzii)
0.01l20 Wright's buckwheatEriogonum wrightii var. subscaposum99 / 913
0.01r21 *redstem filareeErodium cicutarium4 / 240
0.02l22 California dodderCuscuta californica var. californica3 / 313
0.02l23 thorny skeleton-plantStephanomeria spinosa50 / 41
0.03b24 changeable phaceliaPhacelia mutabilis+20 / 92
0.03r  (Fremont's bush mallow, Malacothamnus fremontii)
0.03r25 mountain whitethornCeanothus cordulatus99 / 914
0.03r26 smoothleaf yerba santaEriodictyon trichocalyx var. trichocalyx99 / 98
0.04l27 Fremont's bush mallowMalacothamnus fremontii99 / 94
0.05l28 sulphur buckwheatEriogonum umbellatum var. munzii99 / 99
0.05   Trail slowly curves right 90°.
0.07l29 Mojave linanthusLinanthus breviculus / 6
 l30 sapphire woolly-starEriastrum sapphirinum+ / 2
 l31 volcanic giliaGilia ochroleuca ssp. vivida / 4
0.08r  Great view down the upper part of the East Fork of the San Gabriel River, including Vincent Gulch and Prairie Gulch.
0.08l32 prickly poppyArgemone munita3 / 36
0.10b33 California buckwheatEriogonum fasciculatum var. polifolium50 / 914
0.12r34 Parish's snowberrySymphoricarpos rotundifolius var. parishii99 / 910
 l35 mountain blazing starMentzelia montana / 3
 l36 Davidson's phaceliaPhacelia davidsonii / 7
 l37 purple nightshadeSolanum xanti / 12
 l38 branching phaceliaPhacelia ramosissima var. latifolia5 / 525
0.18 39 slender wreathplantStephanomeria exigua ssp. coronaria3 / 31
 l40 golden yarrowEriophyllum confertiflorum var. confertiflorum / 47
 r41 southern mountain woolly-starEriastrum densifolium ssp. austromontanum / 10
0.23r  PCT post.
0.23   Cross road that leads to the microwave towers on the left.
0.23r  (broad-leaved lotus, Lotus crassifolius var. crassifolius)
 b42 splendid giliaGilia splendens ssp. splendens / 6
0.24b43 broad-leaved lotusLotus crassifolius var. crassifolius10 / 35
0.25b44 pinegrove groundsmokeGayophytum oligospermum50 / 48
0.25l45 blue elderberrySambucus mexicana5 / 539
 r46 Martin's paintbrushCastilleja applegatei ssp. martinii / 14
0.26r47 California fuchsiaEpilobium canum+20 / 212
 r48 California needlegrassAchnatherum occidentale ssp. californicum10 / 55
0.26l49 Davidson's buckwheatEriogonum davidsonii / 18
 l50 popcorn flowerCryptantha intermedia / 21
0.27l  PCT post.
0.27l51 *Russian thistleSalsola tragus10 / 324
 r52spknotweedPolygonum arenastrum? /  
 r53 arched elegant rock-cressArabis sparsiflora var. arcuata / 6
0.28   Cross lower end of microwave tower road, parking lot, and pass the gated access road to Mountain High Ski Area on the left.
0.30l  PCT post.
0.30l54 California-asterLessingia filaginifolia var. filaginifolia20 / 942
 l  (California thistle, Cirsium occidentale var. californicum)
 l55 clustered broom-rapeOrobanche fasciculata+ / 1
 l56 silky lupineLupinus elatus / 5
 r57 wax currantRibes cereum var. cereum3 / 311
 r58 western wallflowerErysimum capitatum ssp. capitatum / 16
0.44l  Jct. path to Mountain High Ski Area access road; telephone pole with wires going underground at this point.
 b59 one-sided bluegrassPoa secunda ssp. secunda30 / 521
0.47r60 southern mountain phloxPhlox austromontana20 / 52
0.47r61 spur lupineLupinus arbustus5 / 21
 l  (poodle-dog bush, Turricula parryi)
 r62 California black oakQuercus kelloggii / 11
 r63 Sierra gooseberryRibes roezlii var. roezlii / 8
0.50r64 beaked penstemonPenstemon rostriflorus / 12
 l65 Utah service-berryAmelanchier utahensis1 / 17
 r66~sticky cinquefoilPotentilla glandulosa ssp. reflexa1 / 110
 r67~Wright's collinsiaCollinsia torreyi var. wrightii / 4
 r68 southern miner's lettuceClaytonia perfoliata ssp. mexicana / 16
0.51   Check for Bromus carinatus.
0.51r69~blue wildryeElymus glaucus ssp. glaucus / 17
 r70 white catch-flySilene verecunda ssp. platyota / 8
0.53l71 white false-giliaAllophyllum integrifolium10 / 12
0.53r72 low mountain bedstrawGalium bifolium30 / 11
 r73~Parry's sand cressCalyptridium parryi var. parryi / 3
0.54l74 forest goosefootChenopodium atrovirens / 4
0.55b75 wild tarragonArtemisia dracunculus20 / 521
 r76 spreading larkspurDelphinium patens ssp. montanum / 4
 r77 naked buckwheatEriogonum nudum+ / 7
 r78 little spring beautyClaytonia exigua ssp. exigua / 4
 r79 pine lousewortPedicularis semibarbata / 9
 r80 whispering bellsEmmenanthe penduliflora var. penduliflora / 9
 r81 spear-leaved mountain dandelionAgoseris retrorsa / 11
0.64   Round ridge; now on east-facing slope; elevation 7480 feet (2280 m).
0.64b82 poodle-dog bushTurricula parryi30 / 94
0.65l  The entire hillside here is poodle-dog bush, Turricula parryi, and Fremont's bush mallow, Malacothamnus fremontii!
0.81r  PCT post; jct. Blue Ridge Road; highest point on loop, elevation 7540 feet (2300 m). Go right on the road, back to the trailhead.
 r  Jct. road to a parking area.
 l83~Davidson's lotusLotus nevadensis var. davidsonii / 7
 l84?unk grass similar to Festuca / Phalaris.
0.86r  Jct. road.
0.88r85 bitter rootLewisia rediviva / 2
 r86 Parish's larkspurDelphinium parishii ssp. parishii / 2
 r87 beautiful rock-cressArabis pulchra var. pulchra / 1
0.92l88 canyon live oakQuercus chrysolepis5 / 220
0.95   Beautiful view ahead of Punchbowl Fault west of Vincent Gap.
 l89 Grinnell's beardtonguePenstemon grinnellii var. grinnellii1 / 115
1.35r  Parking area; road to microwave towers.
1.46r90 *desert crested wheatgrassAgropyron desertorum5 / 14
1.62r  Boulder with very wavy layers.
1.63   Back at Trailhead; end guide

Comments On Specific Species

Ribes lasianthum. The two young plants here are too young to id. Fortunately, there are many Ribes lasianthum immediately to the west on the Lightning Ridge Trail which resemble these plants closely. Hence this id is given here with a "~", indicating that it has not been keyed out, but the id is 95% confident.

Phacelia mutabilis. These plants are matted! It is possible that the exposed windy location here has caused that behavior. It is also possible that this characteristic is endemic to the San Gabriel Mountains for this taxon. The taxon P. oreopola is a judgement-reserved taxon in the JM, found only here, which forms mats.

Eriastrum sapphirinum. These plants were the former ssp. ambiguum, which has a pale blue corolla, not the usual bright blue one.

Epilobium canum. No subspecies is listed since many of the ones we see at high elevations of the San Gabriel Mountains seem to be hybrids between the two subspecies. However, these plants have the longest and widest leaves (36 x 19 mm) we have ever encountered, making them the purest ssp. latifolia we have seen. See Comments on the Jepson Manual and A Flora of Southern California by Munz: Epilobium canum.

Orobanche fasciculata. These plants were parasites on Eriogonum wrightii.

Eriogonum nudum. The plants in this area of the San Gabriel Mountains are intermediate between sspp. pauciflorum and westonii. Hence we cannot assign them to either of these subspecies.


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Copyright © 2003-2004 by Jane Strong and Tom Chester.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
http://tchester.org/sgm/plants/guides/pct_east_of_lr.html
Comments and feedback: Jane Strong | Tom Chester
Updated 2 October 2004.