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:
- An ongoing lesson in plant succession after a major fire. The area burned in 1998, and it still contains some of the species that dominate after a fire. The burn may account for the excellent wildflower display here.
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 TaxonNumber Of Taxa
On This Trail% of Taxa
On This Trail1 7 8% 2 6 7% 3 3 3% 4 9 10% 5 5 6% 1-5 30 34% 6-10 25 28% 11-15 15 17% 16-20 6 7% 21-25 7 8% 26-30 0 0% 31-35 1 1% 36-40 2 2% 41-45 1 1% 46-50 1 1% Total Taxa 88 100% 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:
# all Latin Name Common Name 1 Arabis pulchra var. pulchra beautiful rock-cress 1 Galium bifolium low mountain bedstraw 1 Lupinus arbustus spur lupine 1 Lupinus excubitus var. johnstonii interior bush lupine 1 Orobanche fasciculata clustered broom-rape 1 Stephanomeria exigua ssp. coronaria slender wreathplant 1 Stephanomeria spinosa thorny skeleton-plant 2 Allophyllum integrifolium white false-gilia 2 Delphinium parishii ssp. parishii Parish's larkspur 2 Eriastrum sapphirinum sapphire woolly-star 2 Lewisia rediviva bitter root 2 Phacelia mutabilis changeable phacelia 2 Phlox austromontana southern mountain phlox 2 Ribes 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 Date Visit # # taxa # "?" # "sp" # "~" # "ssp" 6/26/2003 1 88 2 10 8 4 9/23/2004 2 90 1 2 8 1 9/26/2004 3 90 1 1 6 1 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.
Mile S # id? Common Name Latin Name #here #all 0.00 Begin PCT east at Angeles Crest Highway and Blue Ridge Road, elevation 7340 feet (2235 m). 0.00 l 1 mountain sagebrush Artemisia tridentata ssp. vaseyana 99 / 9 8 0.00 r 2 *tumble-mustard Sisymbrium altissimum 99 / 9 9 0.00 l Sign: "PCT Parking [left arrow]" 0.00 l 3 *intermediate wheatgrass Elytrigia intermedia ssp. intermedia 10 / 4 3 0.00 b 4 Orcutt's brome Bromus orcuttianus 20 / 9 6 0.00 r 5 bur-ragweed Ambrosia acanthicarpa 5 / 2 14 0.00 b 6 *downy brome Bromus tectorum 99 / 9 21 0.00 r 7 bitter cherry Prunus emarginata 99 / 9 5 0.00 r 8 white fir Abies concolor / 20 0.00 r 9 ~ alpine gooseberry Ribes lasianthum+ 2 / 2 2 0.00 l 10 plain mariposa lily Calochortus invenustus / 7 0.00 l 11 western morning-glory Calystegia occidentalis ssp. fulcrata / 7 0.00 l 12 threadleaf common rabbitbrush Chrysothamnus nauseosus ssp. consimilis 20 / 5 6 0.00 l 13 leafy daisy Erigeron foliosus var. foliosus 50 / 9 34 0.00 l PCT post. 0.00 l 14 Jeffrey pine Pinus jeffreyi 50 / 9 21 0.01 b 15 San Bernardino rubber rabbitbrush Chrysothamnus nauseosus ssp. bernardinus 20 / 5 14 0.01 l 16 spineless horsebrush Tetradymia canescens 99 / 9 5 0.01 l 17 interior bush lupine Lupinus excubitus var. johnstonii 20 / 9 1 0.01 l (one-sided bluegrass, Poa secunda ssp. secunda) 0.01 r 18 Fremont's goosefoot Chenopodium fremontii 20 / 3 10 0.01 r 19 ssp squirreltail Elymus elymoides ssp. elymoides 30 / 9 4 0.01 r (sulphur buckwheat, Eriogonum umbellatum var. munzii) 0.01 l 20 Wright's buckwheat Eriogonum wrightii var. subscaposum 99 / 9 13 0.01 r 21 *redstem filaree Erodium cicutarium 4 / 2 40 0.02 l 22 California dodder Cuscuta californica var. californica 3 / 3 13 0.02 l 23 thorny skeleton-plant Stephanomeria spinosa 50 / 4 1 0.03 b 24 changeable phacelia Phacelia mutabilis+ 20 / 9 2 0.03 r (Fremont's bush mallow, Malacothamnus fremontii) 0.03 r 25 mountain whitethorn Ceanothus cordulatus 99 / 9 14 0.03 r 26 smoothleaf yerba santa Eriodictyon trichocalyx var. trichocalyx 99 / 9 8 0.04 l 27 Fremont's bush mallow Malacothamnus fremontii 99 / 9 4 0.05 l 28 sulphur buckwheat Eriogonum umbellatum var. munzii 99 / 9 9 0.05 Trail slowly curves right 90°. 0.07 l 29 Mojave linanthus Linanthus breviculus / 6 l 30 sapphire woolly-star Eriastrum sapphirinum+ / 2 l 31 volcanic gilia Gilia ochroleuca ssp. vivida / 4 0.08 r Great view down the upper part of the East Fork of the San Gabriel River, including Vincent Gulch and Prairie Gulch. 0.08 l 32 prickly poppy Argemone munita 3 / 3 6 0.10 b 33 California buckwheat Eriogonum fasciculatum var. polifolium 50 / 9 14 0.12 r 34 Parish's snowberry Symphoricarpos rotundifolius var. parishii 99 / 9 10 l 35 mountain blazing star Mentzelia montana / 3 l 36 Davidson's phacelia Phacelia davidsonii / 7 l 37 purple nightshade Solanum xanti / 12 l 38 branching phacelia Phacelia ramosissima var. latifolia 5 / 5 25 0.18 39 slender wreathplant Stephanomeria exigua ssp. coronaria 3 / 3 1 l 40 golden yarrow Eriophyllum confertiflorum var. confertiflorum / 47 r 41 southern mountain woolly-star Eriastrum densifolium ssp. austromontanum / 10 0.23 r PCT post. 0.23 Cross road that leads to the microwave towers on the left. 0.23 r (broad-leaved lotus, Lotus crassifolius var. crassifolius) b 42 splendid gilia Gilia splendens ssp. splendens / 6 0.24 b 43 broad-leaved lotus Lotus crassifolius var. crassifolius 10 / 3 5 0.25 b 44 pinegrove groundsmoke Gayophytum oligospermum 50 / 4 8 0.25 l 45 blue elderberry Sambucus mexicana 5 / 5 39 r 46 Martin's paintbrush Castilleja applegatei ssp. martinii / 14 0.26 r 47 California fuchsia Epilobium canum+ 20 / 2 12 r 48 California needlegrass Achnatherum occidentale ssp. californicum 10 / 5 5 0.26 l 49 Davidson's buckwheat Eriogonum davidsonii / 18 l 50 popcorn flower Cryptantha intermedia / 21 0.27 l PCT post. 0.27 l 51 *Russian thistle Salsola tragus 10 / 3 24 r 52 sp knotweed Polygonum arenastrum? / r 53 arched elegant rock-cress Arabis 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. 0.30 l PCT post. 0.30 l 54 California-aster Lessingia filaginifolia var. filaginifolia 20 / 9 42 l (California thistle, Cirsium occidentale var. californicum) l 55 clustered broom-rape Orobanche fasciculata+ / 1 l 56 silky lupine Lupinus elatus / 5 r 57 wax currant Ribes cereum var. cereum 3 / 3 11 r 58 western wallflower Erysimum capitatum ssp. capitatum / 16 0.44 l Jct. path to Mountain High Ski Area access road; telephone pole with wires going underground at this point. b 59 one-sided bluegrass Poa secunda ssp. secunda 30 / 5 21 0.47 r 60 southern mountain phlox Phlox austromontana 20 / 5 2 0.47 r 61 spur lupine Lupinus arbustus 5 / 2 1 l (poodle-dog bush, Turricula parryi) r 62 California black oak Quercus kelloggii / 11 r 63 Sierra gooseberry Ribes roezlii var. roezlii / 8 0.50 r 64 beaked penstemon Penstemon rostriflorus / 12 l 65 Utah service-berry Amelanchier utahensis 1 / 1 7 r 66 ~ sticky cinquefoil Potentilla glandulosa ssp. reflexa 1 / 1 10 r 67 ~ Wright's collinsia Collinsia torreyi var. wrightii / 4 r 68 southern miner's lettuce Claytonia perfoliata ssp. mexicana / 16 0.51 Check for Bromus carinatus. 0.51 r 69 ~ blue wildrye Elymus glaucus ssp. glaucus / 17 r 70 white catch-fly Silene verecunda ssp. platyota / 8 0.53 l 71 white false-gilia Allophyllum integrifolium 10 / 1 2 0.53 r 72 low mountain bedstraw Galium bifolium 30 / 1 1 r 73 ~ Parry's sand cress Calyptridium parryi var. parryi / 3 0.54 l 74 forest goosefoot Chenopodium atrovirens / 4 0.55 b 75 wild tarragon Artemisia dracunculus 20 / 5 21 r 76 spreading larkspur Delphinium patens ssp. montanum / 4 r 77 naked buckwheat Eriogonum nudum+ / 7 r 78 little spring beauty Claytonia exigua ssp. exigua / 4 r 79 pine lousewort Pedicularis semibarbata / 9 r 80 whispering bells Emmenanthe penduliflora var. penduliflora / 9 r 81 spear-leaved mountain dandelion Agoseris retrorsa / 11 0.64 Round ridge; now on east-facing slope; elevation 7480 feet (2280 m). 0.64 b 82 poodle-dog bush Turricula parryi 30 / 9 4 0.65 l The entire hillside here is poodle-dog bush, Turricula parryi, and Fremont's bush mallow, Malacothamnus fremontii! 0.81 r 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. l 83 ~ Davidson's lotus Lotus nevadensis var. davidsonii / 7 l 84 ? unk grass similar to Festuca / Phalaris. 0.86 r Jct. road. 0.88 r 85 bitter root Lewisia rediviva / 2 r 86 Parish's larkspur Delphinium parishii ssp. parishii / 2 r 87 beautiful rock-cress Arabis pulchra var. pulchra / 1 0.92 l 88 canyon live oak Quercus chrysolepis 5 / 2 20 0.95 Beautiful view ahead of Punchbowl Fault west of Vincent Gap. l 89 Grinnell's beardtongue Penstemon grinnellii var. grinnellii 1 / 1 15 1.35 r Parking area; road to microwave towers. 1.46 r 90 *desert crested wheatgrass Agropyron desertorum 5 / 1 4 1.62 r 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.
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Comments and feedback: Jane Strong | Tom Chester
Updated 2 October 2004.