Native and Introduced Plants of Southern California

Master List of Southern California species and where to find them Regional Floras Plant Guides for Trails Search the Floras and Plant Guides	Analysis Pages Species Abundance Statistics Number Of Total Taxa Vs. Total Trail Length Number Of Taxa Vs. Distance Along A Trail How Common Are The Plants Of Southern California? Most Common Plants Plant Families With the Most Entries in Our Master List Jepson Manual Analysis: Number of Species by Geographic Area Resolved Into The Number Of Taxa From Successively Larger Areas Non-Native Plants Rate of Introduction of New Species With Time At The Santa Rosa Plateau and Riverside County Percentage of Native Taxa Vs. Elevation: see first plot here Distribution of Natives Vs. Non-Natives Most Common Non-Native Plants List of All Non-Native Taxa in Southern California Observed On A Trail Or In A Flora Analysis of Preliminary Cal-IPC Noxious Weed Ratings Analysis of Plants Blooming on the Vernal Pool Trail, Santa Rosa Plateau, Vs. Time from 2001 to 2005 Dominant Species of Devils Slide Trail and Their Recent Death Rates, San Jacinto Mountains Dominant Species of the West Rim of Tahquitz Valley and Their Recent Death Rates, San Jacinto Mountains Specific Species Achnatherum coronatum / A. parishii Anza-Borrego Desert Annuals From Seedling To Flower Arctostaphylos (Manzanitas) Arctostaphylos glauca Specimens With Cordate Leaves Geographic Distribution of Arctostaphylos Species in the San Gabriel Mountains Arctostaphylos pringlei and A. pungens in the San Jacinto Mountain Area Hybrids of Arctostaphylos patula and A. pringlei in the San Jacinto Mountains Nascent Inflorescences In Arctostaphylos pringlei ssp. drupacea Baccharis emoryi / B. pilularis Brassica nigra and Hirschfeldia incana (Mustards): How to Tell The Difference Brodiaea Calystegia macrostegia subspecies intermedia and tenuifolia are bogus Chrysothamnus nauseosus (rabbitbrush; includes map of distribution in the San Gabriel Mountains) Ehrharta longiflora Galium angustifolium ssp. jacinticum Does Geranium richardsonii Exist In Southern California? Gilias of San Diego County Gnaphalium canescens subspecies Gutierrezia (Matchweed) Lycium Species of the San Diego County Desert Machaeranthera (Dieteria) Opuntia (chollas and prickly-pears) Opuntia acanthocarpa var. coloradensis Opuntia bigelovii and O. fosbergii Opuntia echinocarpa, O. ganderi, O. parryi, and O. wolfii Pictorial Identification Guide Locations Analysis of How Well Non-Blooming Specimens Are Distinguished "Intergradation" between Opuntia parryi and O. ganderi The transition between Opuntia parryi and O. ganderi along Highway S2 in San Diego County Opuntia ganderi In Extreme Northeast San Diego County Phacelia minor with spots like P. parryi Phacelia nashiana = P. campanularia2 Pilostyles thurberi, Southern California's Most Unusual Wildflower Pinus jeffreyi and P. ponderosa (Yellow Pines) Pinus monophylla X P. quadrifolia, a Two Needle Pine, in the Thomas Mountains at SnJt, aka "Pinus edulis" Poa annua and P. infirma Quercus (Oaks) The "Quercus engelmannii" at Horsethief Creek, Santa Rosa Mountains Quercus spp. (Scrub oaks) Ranunculus occidentalis at the Santa Rosa Plateau Rhamnus ilicifolia and R. pilosa Salix: Key to Willows of Coastal Southern California Below 6000 Feet Elevation Stephanomeria (twiggy wreath, wand chicory, wirelettuce) Geographic Distribution Stephanomeria diegensis (San Diego wreathplant) Stephanomeria exigua (small wirelettuce) Stephanomeria virgata (twiggy wreath, wand chicory) Symphoricarpos albus var. laevigatus
Botanical Trail Reports (reports from the field, roughly every four days) Plant Species of the Borrego Desert: 2009-2010 Blooms Plant Species of the Borrego Desert: Pictorial Gallery of Species in Bloom To Date in 2009-2010
Regional Information Field Guide to the Santa Rosa Plateau: Plants Field Guide to the San Gabriel Mountains: Natural History: Plants Field Guide to San Diego County: Natural History: Plants Plant Species of San Jacinto Mountain The Borrego Desert
Comments on the Jepson Manual and A Flora of Southern California by Munz Comments On Floras and Wildflower Books Latin Name Changes (gives the Munz and other equivalents of the Jepson Manual Latin Names, as well as more recent updates to the Jepson Manual names) Chollas (name changes, distribution, key) Wayne Armstrong's Index Giving Jepson Manual Page Numbers For Plant Families (can be pasted into the JM for quick family look-up)
General Information How To Identify Plants (for beginners) California Plant Pictures and Databases Interesting Plant Facts Plants Blooming Now in Southern California Interesting Bloom Reports: Comparison of the 2002 Riverside / San Diego County Bloom to the 2001 Bloom An April Bloom In October! California Oaks Unlabeled Plant Links References for pages on this site
A Happy Botanist References for pages on this site Three Letter Abbreviation For Plant Families Master List: Number of trails, lists and taxa vs time and number of taxa found only on a single trail Update Log Native and Introduced Plants of the Grand Canyon, Arizona