CAS, DS. Worldwide, nearly 1.9 million specimens (27% from California); more than 95% vascular seed plants; the remainder are ferns and a growing collection of bryophytes. Emphasis is on California, North America, Latin America (especially western and southern Mexico and the Galapagos) and Asia (especially China). Vascular plant families and genera that are particularly well represented include Acanthaceae, Brassicaceae, Carex, Eriogonum, Hydrophyllaceae, Lupinus, Asteraceae (particularly Madinae), Malvaceae, Melastomataceae, Onagraceae, Penstemon, Poaceae, Polemoniaceae and Quercus. The herbarium also contains the largest collection of ornamental plants in California.

This dataset contains only specimens collected in the following regions (if they exist in this collection):

Angola, Benin, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Republic of Congo, Democratic Republic of the Congo, Côte d'Ivoire, Djibouti, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Malawi, Mali, Mozambique, Niger, Nigeria, Rwanda, Sao Tome and Principe, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, and Zambia.