Plants of Southern California: Regional Floras

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Table of Contents

Introduction to the Regional Floras
Search The Regional Floras
The Regional Floras

• List by Political Region (doesn't include any from List by Geographic Region)
  • Orange County
  • Riverside County
  • San Diego County

• List by Geographic Region
  • Transverse Ranges (TR)
  • Mojave Desert (DMoj)
  • Channel Islands (ChI)
  • South Coast (SCo)
  • Peninsular Ranges (PR)
  • Sonoran Desert (DSon)

  • Sierra Nevada (SN) (outside of southern California!)

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My ultimate goal is to provide Regional Floras for each of the broad regions of Southern California. Each of the Regional Floras in turn will link to floras of smaller areas within each Region.

Until I create the Regional Floras, this page will link to all available floras (with the exception of my Trail Guides, which are presented separately). Some of these sub-regional floras are lists I have put together to help with the Trail Guides, and some of them are floras done by others. Many of them are from Bob Muns.

The tables below also provide information about floras that are not online. I just began to add those floras in late 2005, so it will be a while before the list is very complete for them.

The Floras by Bob Muns are also collected together on a single page, since his lists are the largest and most uniform set of floras for Southern California.

Introduction to the Regional Floras

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Search The Regional Floras

A detailed description of how to search the Regional Floras online at this site to find all occurrences of a given taxon is given in Search tchester.org.

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The Regional Floras

The main list below is organized by geographic region of Southern California. Some floras are organized by political regions, and are given separately.

List by Political Region

This section only includes floras that combine at least two geographic regions, and therefore doesn't include any floras from the List by Geographic Region.

Orange County

Orange County contains portions of the South Coast and Peninsular Range.

• A Checklist of the Vascular Plants of Orange County, California, second edition, Fred M. Roberts, Jr. (1,269 taxa, 1998)

Riverside County

Western Riverside County contains portions of the South Coast and Peninsular Range, with a very tiny slice of the Transverse Ranges.

• The Vascular Plants of Western Riverside County, California: An Annotated Checklist, Fred M. Roberts, Jr., Scott D. White, Andrew C. Sanders, David E. Bramlet, and Steve Boyd (1,411 taxa, 2004)

• Comments on the Flora of Western Riverside County (additions of 69 taxa to the above flora, 2005)

San Diego County

San Diego County contains portions of the South Coast, Peninsular Range, and Sonoran Desert.

• Checklist of the Vascular Plants of San Diego County (2,147 taxa; 2001)
  • Northwest San Diego County (730 taxa; 2007)
• Find a San Diego County Plant Name (search feature for latest version of the San Diego County Checklist, which includes new records from the survey linked next)
• Public Search of the San Diego County Plant Atlas (ongoing survey)

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List by Geographic Region

Transverse Ranges (TR)

• Western Transverse Ranges (WTR)
  • Mt. Pinos Region Flora, Ventura and Kern Counties (315 taxa, 1985)
  • Mt. Pinos Summit Flora, Ventura and Kern Counties (150 taxa, 1992, Rev. 1994)

  • Santa Monica Mountains: Bob Muns (~950 taxa; 1999); Gibson and Prigge (collections and sightings from vouchers, checklists, and EIRs)
    • Mishe Mokwa Trail, Santa Monica Mountains, Los Angeles County (201 taxa; 1995; flora from 1994 and 1995, the first and second years after it burned)
    • Charmlee Regional Park, Santa Monica Mountains, Los Angeles County (233 taxa; 1984, 1987, 2002)
    • Malibu Creek State Park, Santa Monica Mountains, Los Angeles County (407 taxa; 1983)
    • Point Mugu State Park, Santa Monica Mountains, Ventura County (405 taxa; 1988)
    • Topanga State Park, Santa Monica Mountains, Los Angeles County (347 taxa; 1983)

• San Gabriel Mountains (SnGb)
  • Eastern San Gabriel Mountains
    • Plants Of The Eastern San Gabriel Mountains: An Initial Checklist (1,331 taxa; 2008)
    • Flora of the Pine Belt of the San Gabriel Mountains (335 taxa; 2004)
    • The Flora of the Pine Belt of the San Antonio Mountains of Southern California, Ivan M. Johnston, 1919.
    • San Dimas Experimental Forest Vascular Plant List (also available as an excel or text file here, along with an excel file for mosses; links not working on 2/21/05)
    • Plants Of Glendora's South Hills (502 taxa; 2005)
  • Western San Gabriel Mountains
    • Flora of Devil's Punchbowl (143 taxa)
    • Placerita Canyon, Los Angeles County Park (331 taxa; 1994 + 4 added in 2001)
    • Flora of Lower Mt. Wilson, San Gabriel Mountains (455 taxa; 2001; compilation of the following floras)
      • Arroyo Seco, Lower Portion (227 taxa; 2001)
      • Eaton Canyon, Lower Portion (316 taxa; 1984, with additions in 1989 and 1994)
      • Mount Wilson Toll Road (208 taxa; ~1980)
      • Chantry Flat / Santa Anita Canyon (248 taxa; 1999)
    • Flora of Lower Eaton Canyon, San Gabriel Mountains (382 taxa; 2003; updated from the 1984 list in the previous link)

• San Bernardino Mountains (SnBr)
  • Plant Checklist for Whiskey Springs / Cactus Flat / Cushenbury Canyon Area (326 taxa; 2011)
  • Heart Bar State Park / Fish Creek Area, San Bernardino Mountains Above 1800 m (139 + 7? taxa; 2002)
  • Plant Checklist for Vivian Creek and Forest Falls Area (361 taxa; 2009)
  • Plant Checklist for Banning, Cabazon, Morongo Indian Reservation, Snow Creek, Whitewater River Canyon area (814 taxa; 2010)
  • Plant Checklist for Whitewater Creek (525 taxa; 2010)
  • Plant Checklist for Mission Creek Area (172 taxa; 2010)
  • New Dixie Mine Road Area, west of Landers (202 taxa; 2010)

Mojave Desert (DMoj)

• Flora of Wildflower and Wildlife Sanctuaries in Antelope Valley (119 taxa)
• Cactus Flat Road Area, Inyo County (109 taxa; 2011)
• Death Valley (1,042 taxa)
• New Dixie Mine Road Area, west of Landers (201 taxa; 2010)
• Iron Age Mine Area, east of 29 Palms (70 taxa; 2011)
• Desert Mountains (DMtns)
  • Queen Mountain Area, Joshua Tree National Park (249 taxa; 2011)
  • Red Butte Wash / Hayfield Area, Joshua Tree National Park

Channel Islands (ChI)

• North Channel Islands (n ChI)
• South Channel Islands (s ChI)

South Coast (SCo)

• Los Angeles County
  • Malibu Lagoon State Park, Santa Monica Mountains, Los Angeles County (133 taxa; 1988)
  • Plants Of Glendora's South Hills (502 taxa; 2005)

• Orange County
  • Bolsa Chica Marsh, Orange County (201 taxa; 1983, 1999)
  • Crystal Cove State Park, Orange County (319 taxa; 1996)
  • Laurel Canyon, Laguna Coast Wilderness Park, Orange County (221 taxa; 2003)

• San Diego County
  • Oceanside (160 taxa; 2007)
  • Carlsbad (372 taxa; 2007)
  • Lake Calavera and the Calavera Heights preserves, Carlsbad (351 taxa; 2010)
  • San Elijo Lagoon and Vicinity (408 taxa; 2003)
  • Torrey Pines State Reserve, San Diego (491 taxa; 1990)

Peninsular Ranges (PR)

• San Jacinto Mountains (609 taxa; 2007)
  • Plants With Voucher Records for San Jacinto Mountain above 1800 m (6000 feet) (160 taxa; 2002)
  • Black Mountain Trail (105 taxa; 2011)
  • Dark Canyon Area Above 6000 Feet Elevation (275 taxa; 2010)
    • 7 Pines Trail Area (155 taxa; 2011)
    • Marion Mountain Trail to Deer Springs Camp Area (2010)
  • Devils Slide Trail (133 taxa; 2011)
  • Ernie Maxwell Trail (104 taxa; 2009)
  • Fuller Ridge Area (138 taxa; 2011)
  • Garner Valley (675 taxa, 2011)
  • Garner Valley and Thomas Mountain (353 taxa, mostly from voucher records, compiled by Erik Blume)
  • Hall Canyon at the James Reserve (~259 species at the James Reserve near Idyllwild)
  • Hidden Lake Drainage Basin (51 taxa; 2008)
  • Idyllwild Area (468 taxa; 2010)
  • Idyllwild Park (130 taxa; 2010)
  • Palm, Andreas, Murray and Tahquitz Canyons below 3000 Feet Elevation (396 taxa; 2011)
  • PCT From Little Tahquitz Trail to Zen Trail (98 taxa; 2011)
  • San Jacinto Peak (29 taxa; 2008)
  • Strawberry Creek Gorge below Idyllwild (The Grotto; 192 taxa; 2011)
  • Tahquitz Valley
    • Flora of the Meadows of Tahquitz Valley, including flora of Tahquitz Meadow, Skunk Cabbage Meadow, Little Tahquitz Meadow, Reeds Meadow and Wellman Cienega (151 taxa; 2011)
    • Skunk Cabbage Meadow (103 taxa; 2011)
    • Tahquitz Valley Checklist, with separate columns for Skunk Cabbage Meadow, Tahquitz Meadow, Wellman Cienega, Candys Creek, and Tahquitz and Willow Creeks (267 taxa; 2011, but with older, much more incomplete meadow columns than the Meadow flora linked above)
    • Tahquitz and Willow Creeks (185 taxa; 2009)
    • Wellman Cienega (79 taxa; 2010)
  • Tahquitz Peak and Red Tahquitz Peak Area (100 taxa; 2008)
  • Tamarack, Round and Long Valleys (127 taxa; 2008)

• Santa Rosa Mountains (607 taxa from Zabriskie; 546 taxa from vouchers; 2006)
  • Cactus Spring Trail (228 taxa; 2008)
  • Santa Rosa Mountains Above 7800 Feet Elevation (115 taxa; 2009)

• Santa Ana Mountains / Puente Hills
  • Whittier Hills, Los Angeles County (281 taxa; 2002)
  • Skyline Trail, Puente Hills, Los Angeles County (168 taxa; 1982)
  • Caspers Wilderness Park, Orange County (162 taxa; 2002, 2003)
  • Santa Rosa Plateau, Riverside County (667 taxa; 2005; see also 2010 Burn Area and list from online vouchers 380 taxa; 2007)
  • Santa Margarita Ecological Reserve, Riverside and San Diego Counties (388 taxa; 2003)
  • Margarita Peak Area, San Diego County (82 taxa; 2007)
  • Fallbrook, North San Diego County (250 taxa; 2007)

• Cahuilla Mountain (120 taxa; 2007)
• Cahuilla Mountain Area (195 taxa; 2009)

• Palomar Mountains (no separate flora yet available - see Plants of the Palomar, Cuyamaca & Laguna Mt. Region 833 taxa; 2003)
  • Dripping Springs, Agua Tibia Mountains, Palomar Range (399 taxa; 2007)

• Western San Diego County
  • San Marcos Hills (282 taxa; 2003)
  • Daley Ranch, northernmost part of the city of Escondido (494 taxa; 2005; see also Erik Blume's version of the list; 422 taxa; 2007)
  • Blue Sky Ecological Reserve, Poway (357 taxa; 2007)
  • Rattlesnake Canyon, Poway (254 taxa; 2008)
  • Iron Mountain, Poway (393 taxa; 2010)

• Cuyamaca / Laguna Mountains (the 2003 checklist by Hirshberg and Clemons is no longer online; see Plants of the Palomar, Cuyamaca & Laguna Mt. Region 833 taxa; 2003)
  • Cuyamaca State Park (405 taxa; 2007)
  • Laguna Mountains (637 taxa; 2007)
  • Volcan Mountain (155 taxa; 2007)

Sonoran Desert (DSon)

• Most or all of Anza-Borrego Desert
  • Updated Duffie Clemons 1985 Checklist of Vascular Plants of the Anza-Borrego Desert (835 taxa; 1985)
  • Wayne Armstrong's Anza-Borrego Desert Region (511 taxa; 2003)
  • Erik Blume's Checklist from Vouchers (467 taxa; 2007)

• Subregions of Anza-Borrego Desert

  • Northern Portion (from west to east)
    • Canyons immediately west of town of Borrego Springs
      • Henderson Canyon (141 taxa; 2008)
      • Borrego Palm Canyon (305 taxa; 2008)
      • Little Surprise Canyon (97 taxa; 2009)
      • Lowermost Tubb Canyon (85 taxa; 2011); checklist includes columns for Little Surprise Canyon and Glorietta Canyons (156 taxa; 2011)
      • Glorietta / Juanito Canyons (124 taxa; 2011)
      • Culp Valley / Hellhole Canyon (328 taxa; 2010)
    • Coyote Mountain Area near Borrego Springs (231 taxa; 2007)
      • Desert Gardens (25 taxa; 2007)
      • First Crossing (41 taxa; 2007)
    • Clark Valley Area (153 taxa; 2008)
      • Butler and Rockhouse Canyons (147 taxa; 2009)
    • Borrego Badlands (115 taxa; 2008)
    • Borrego Mountain (140 taxa; 2011)
    • Southeast Santa Rosa Mountains (181 taxa; 2008; see most recent flora)
      • Villager Peak Trail (194 taxa; 2011)
      • Rattlesnake Canyon and surrounding area (183 taxa; 2011)
      • Palo Verde Canyon and Upper Wash (115 taxa; 2011)
      • Smoke Tree and Coachwhip Canyons (93 taxa from survey / 214 taxa for area; 2008)
      • Upper Palm Wash / Calcite Mine Road (57 taxa from survey / 197 taxa for area; 2008)
      • Extreme Northeast San Diego County (99 taxa; 2008)

  • Middle Portion
    • San Felipe Valley (594 taxa; 2010)
      • PCT North of Scissors Crossing (80 taxa; 2010)
    • Blair Valley (132 taxa; 2007)
    • Vallecito Valley (91 taxa; 2007)
    • Grapevine Canyon Area (237 taxa for it alone; 2011), including Mescal Bajada and Mine Canyon / Mine Wash Checklist (330 total taxa; 2011)
    • Mason Valley Area (345 taxa; 2012)
      • Oriflamme Canyon (382 taxa including Mason Valley Area Vouchers; 2012)
    • Mescal Bajada Area (191 taxa; 2010)
    • Northeast Vallecito Mountains (166 taxa; 2009)
      • Harper Canyon (138 taxa; 2011)
      • Starfish Cove (63 taxa; 2000)
    • Whale Peak / Pinyon Mountain Valley Area (218 taxa; 2011)
    • Agua Caliente County Park Area (237 taxa; 2009)

  • Southern Portion

• Other Sonoran Desert
  • Red Butte Wash / Hayfield Area, Joshua Tree National Park
  • Mecca Hills, Riverside County (174 taxa; 2011)
  • Palm Wash Area, Extreme Northwest Imperial County (121 taxa; 2010)
  • San Sebastian Marsh, Imperial County (96 taxa; 2011)
  • Ocotillo / Coyote Mountains Area, Imperial County (270 taxa; 2010)
    • Fossil Canyon, Coyote Mountains, Imperial County (101 taxa; 2011)

Sierra Nevada (SN)

This is outside of southern California, but I had to link this from someplace.

• Lundy Canyon and Lee Vining Creek Area (605 taxa; 2010)
• Walker Pass Area (169 taxa; 2011)

Go to:

• Native and Introduced Plants of Southern California