Flora of Hidden Lake Drainage Basin, San Jacinto Mountain
Procedure For Compiling The Checklist
Hidden Lake is a vernal pool at San Jacinto Mountain at an elevation of about 8700 feet. The pool fills with water in spring in normal rainfall years, and then dries up during the summer. As the pool recedes, very specialized plants grown along the margins of the water.
This is a flora of the Hidden Lake Drainage Basin, compiled from vouchers and from our fieldwork. It includes species found in the Lake itself, as well as species found in the surrounding territory that drains to the Lake, an area of about 0.25 miles north-south and 0.20 miles east-west. The total area is about 0.05 square miles (=33 acres = 13.5 hectares). See the map below for the boundaries of the drainage basin.
So far, we have seen no non-native species in this area, and there is only a single voucher of one from here.
If you go to Hidden Lake, please do not trample the plant species along the margins of the Lake! Footprints from visitors can easily take a huge toll among these very specialized plants that live only here, by killing them directly by your boots and indirectly by changing the soil texture of their home. Staying away from the lake margins, and heading to Desert View on the well-established path, is the best way to respect the plants living here and allow them to continue to thrive in this special location. The plants are quite uniform around the entire lake, and hence you will see almost all the species by staying on the well-established path.
Hidden Lake is located 0.9 air miles south of the upper tram station, at the lower right corner of the following map. The dashed line shows the margins of the Hidden Lake Drainage Basin.
Procedure For Compiling The Checklist
The Checklist was compiled from online vouchers, and from field work done by the authors on 25 June 2008 and on 21 August 2012.
The vouchers were obtained on 27 June 2008 and on 26 August 2017 from combining two searches on each date of the Consortium of California Herbaria, a search for Lake Surprise and a search for Hidden Lake. Only vouchers that appeared to be from the drainage area were kept; vouchers given with localities such as trail on way to Hidden Lake were ignored. A total of 62 taxa were vouchered.
The field work from 25 June 2008 and 21 August 2012 found 43 taxa, of which 26 were also in the voucher list.
The total list includes 79 taxa.
We have not looked at any of the vouchers yet, so we cannot vouch for their determinations. We have checked only the names of the taxa to make sure it was not unreasonable for them to occur here.
Checklist for Hidden Lake Drainage Basin
Basic information about the checklist presentation and links:
- Notes on the Scientific Names Used At This Site and
- Information about the links from the Scientific Name and Common Name.
An asterisk before the Common Name indicates a non-native taxon.
There are three columns that follow the names for each taxa.
The first column (header #V) gives the number of vouchers found in the Hidden Lake Drainage Basin from the procedure detailed above.
The second column (header HL) denotes those taxa found within the margin of the highest waterline of the lake. There is some uncertainty about whether species known only from vouchers whose locality is just Hidden Lake were actually found within the lake margins or not. We've used our judgment as to which of those probably were found within the lake.
The third column (header #Pls) gives a rough estimate of the number of plants for taxa seen in our field surveys, with a maximum value of 99 plants. The main intent of this column is to indicate the species for which we found few plants.
Version for printing, without lines and other text on this page: html (3 pages) or pdf Clickbook booklet (1 double-sided page). (See printing instructions for an explanation of these options)
# Family Scientific Name (*)Common Name #V HL #Pls Ferns 1 Woodsiaceae Cystopteris fragilis brittle bladder fern 4 Gymnosperms 2 Pinaceae Abies concolor white fir 20 3 Pinaceae Pinus contorta ssp. murrayana lodgepole pine 3 20 4 Pinaceae Pinus jeffreyi Jeffrey pine 20 5 Pinaceae Pinus lambertiana sugar pine 20 Eudicots 6 Asteraceae Antennaria rosea rosy everlasting, pussytoes 1 7 Asteraceae Ericameria nauseosa var. bernardina San Bernardino rubber rabbitbrush 10 8 Asteraceae Gnaphalium palustre western marsh cudweed 7 HL 99 9 Asteraceae Hieracium horridum prickly hawkweed 1 10 Asteraceae Solidago velutina ssp. californica goldenrod 20 11 Asteraceae Sonchus asper ssp. asper *prickly sow thistle 1 12 Boraginaceae Cryptantha micrantha var. lepida mountain red-root cryptantha 9 50 13 Brassicaceae Boechera retrofracta X mountain rock-cress 1 14 Brassicaceae Draba saxosa San Jacinto rock draba 1 15 Brassicaceae Rorippa curvisiliqua curvepod yellow-cress 1 HL 16 Caryophyllaceae Sagina decumbens ssp. occidentalis western pearlwort 1 HL 17 Caryophyllaceae Silene parishii Parish's campion 1 10 18 Caryophyllaceae Silene verecunda white catch-fly 2 1 19 Crassulaceae Crassula aquatica aquatic pygmy-weed 9 HL 99 20 Elatinaceae Elatine brachysperma short-seed waterwort 2 HL 21 Elatinaceae Elatine californica California waterwort 1 HL 22 Ericaceae Arctostaphylos patula green-leaf manzanita 10 23 Ericaceae Pyrola aphylla leafless wintergreen 2 24 Ericaceae Pyrola picta s.l. white-veined wintergreen 1 25 Ericaceae Sarcodes sanguinea snow-plant 1 1 26 Fabaceae Acmispon americanus var. americanus Spanish clover 2 HL 27 Fabaceae Acmispon nevadensis var. davidsonii Davidson's lotus 2 HL 28 Fabaceae Acmispon nevadensis var. nevadensis Sierra Nevada lotus 3 HL 99 29 Fabaceae Lupinus hyacinthinus San Jacinto lupine 4 1 30 Fabaceae Trifolium monanthum ssp. grantianum mountain carpet clover 1 HL 31 Fagaceae Chrysolepis sempervirens bush chinquapin 10 32 Fagaceae Quercus chrysolepis canyon live oak 3 33 Hydrangeaceae Philadelphus microphyllus little-leaf mock orange 1 20 34 Lamiaceae Monardella nana little monardella 1 35 Lamiaceae Salvia pachyphylla rose sage 1 36 Lamiaceae Trichostema austromontanum ssp. compactum Hidden Lake bluecurls 13 HL 99 37 Montiaceae Calyptridium parryi var. parryi Parry's sand cress 3 HL 20 38 Onagraceae Epilobium canum ssp. latifolium mountain California-fuchsia 1 70 39 Onagraceae Gayophytum decipiens deceiving gayophytum 2 40 Onagraceae Gayophytum diffusum ssp. parviflorum groundsmoke 3 20 41 Phrymaceae Mimulus breweri Brewer's monkeyflower 8 HL 99 42 Phrymaceae Mimulus floribundus floriferous monkeyflower 2 HL 43 Phrymaceae Mimulus pilosus false monkeyflower 4 HL 50 44 Phrymaceae Mimulus primuloides primrose monkeyflower 3 HL 45 Phrymaceae Mimulus suksdorfii Suksdorf's monkeyflower 3 HL 99 46 Plantaginaceae Keckiella rothrockii var. jacintensis San Jacinto Mts. keckiella 4 20 47 Plantaginaceae Veronica peregrina ssp. xalapensis purslane speedwell 5 HL 99 48 Polemoniaceae Linanthus jaegeri San Jacinto prickly phlox 3 49 Polemoniaceae Linanthus pungens granite prickly phlox 1 10 50 Polygonaceae Eriogonum nudum var. pauciflorum naked buckwheat 1 51 Polygonaceae Eriogonum wrightii var. subscaposum Wright's buckwheat 1 52 Polygonaceae Sidotheca caryophylloides chickweed oxytheca 5 53 Rhamnaceae Ceanothus cordulatus mountain whitethorn 1 54 Rosaceae Cercocarpus ledifolius curl-leaf mountain-mahogany 10 55 Rosaceae Holodiscus discolor var. microphyllus mountain spray 5 56 Rosaceae Horkelia clevelandii var. clevelandii Cleveland's horkelia 2 HL 57 Rubiaceae Galium parishii Parish's bedstraw 6 5 58 Scrophulariaceae Limosella acaulis stemless mudwort 8 HL 99 Monocots 59 Cyperaceae Carex fracta fragile sheath sedge 10 60 Cyperaceae Carex multicostata many-ribbed sedge 6 61 Cyperaceae Carex subfusca brown sedge 50 62 Cyperaceae Cyperus squarrosus bearded flatsedge 6 HL 63 Cyperaceae Eleocharis acicularis var. acicularis needle spikerush 6 HL 99 64 Cyperaceae Eleocharis bella needle spikerush 5 HL 65 Cyperaceae Eleocharis macrostachya common spikerush 2 HL 99 66 Cyperaceae Lipocarpha occidentalis western hemicarpha 2 HL 67 Juncaceae Juncus bufonius toad rush 7 HL 68 Juncaceae Juncus bufonius var. bufonius toad rush 2 HL 99 69 Juncaceae Juncus bufonius var. occidentalis western toad rush 1 HL 70 Juncaceae Juncus duranii Duran's rush 5 HL 71 Juncaceae Juncus mexicanus Mexican rush HL 99 72 Juncaceae Juncus tiehmii Tiehm's rush 1 HL 73 Juncaceae Juncus triformis Yosemite dwarf rush 1 HL 74 Poaceae Agrostis idahoensis Idaho bentgrass 5 HL 75 Poaceae Agrostis scabra rough bentgrass 1 HL 76 Poaceae Elymus elymoides squirreltail 2 77 Poaceae Muhlenbergia filiformis pullup muhly 10 HL 78 Poaceae Muhlenbergia minutissima annual muhly 1 HL 79 Potamogetonaceae Potamogeton diversifolius diverse-leaved pondweed 16 HL 50
Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
Copyright © 2008-2017 by Tom Chester, Dave Stith, James Dillane, Michael Charters, and Eric Baecht
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
Comments and feedback: Tom Chester
Last update: 26 August 2017