San Diego State University Herbarium (SDSU)
LINKS
Related Web Links:

NEW!
Some Plants of Chile / Algunas Plantas de Chile


General
Biota of North America Program (BONAP)
Plant Systematics Resources 
Video on The Plant Family Tree (Kew Botanic Gardens)

Classification
Angiosperm Phylogeny Website

Databases
Consortium of California Herbaria 1 (CCH1)-California Plants
Consortium of California Herbaria 2 (CCH2)-All Collections
Efloras 
Flora of North America (FNA)
Royal Botanic Garden
 San Diego County Plant Atlas
Tropicos
 USDA 

Education Resources
iDigBio

Identification (thanks to Melyssa for this link!)
Serenta Flowers - Wildflower Identification

Maps
N. Am.: Biota of North America Program (BONAP)
World: Encyclopedia of Life
World: Global Biodiversity Information Facility (GBIF)
Historical: USGS Historical Maps

Nomenclature and Botanical Latin
International Code of Botanical Nomenclature-2018 (Shenzhen)
International Plant Names Index
Botanical Latin

Plant Images
Amsinckiinae (Boraginaceae): The Popcorn Flowers
Calflora.org
Calphoto - Plants
Flowering Vascular Plant Families
Plants of San Diego County, California
Some Plants of Chile / Algunas Plantas de Chile


 


California Botanical Societies
Southern California Botanists
Northern California Botantists
California Botanical Society
California Native Plant Society (CNPS)
California Native Plant Society-San Diego Chapter

NEWS:
See article (Climate Change and the Future of California's Endemic Flora, by Scott R. Loarie, Benjamin E. Carter, Katharine Hayhoe, Sean McMahon, Richard Moe, Charles A. Knight, and David D. Ackerly) on the effect of climate change on California plants, a study that used Consortium data:
  PLoS-ONE
 U.C. Berkeley News