 Spergularia macrotheca (Sticky Sand Spurry), Caryophyllaceae, Perennial:Feb-May, coastal scrub, freshwater wetland |
 Stachys bullata, (California Hedge Nettle), Lamiaceae: Perennial: Apr-Sept, chaparell, redwood forest, coastal strand |
 Suaeda nigra(Bush Seepweed) Chenopodiaceae, Perennial, May-Sept: wetland scrub, sage scrub, coastal sage scrub |
 Symphyotrichum chilense (California Aster) Asteraceae,Perennial:July-Aug, coastal scrub |
 Taraxia ovata (Suncups), Onagraceae, Perennial:Mar-Jun, coastal prarire, mixed evergreen forest |
 Toxicodendron diversilobum (Poison Oak), Anacardiaceae, Vine/Shrub: Mar-Jun, woodland and shrub |
 Toxicoscordion fremontii (Fremont's Star Lily), Melanthiaceae, Perennial: Mar-May: chaparrel, forest |
 Trifolium willdenovii (Tomcat Clover), Fabaceae, Annual:Mar-Jun, chapparell, grassland |
 Typha latifolia (Common Cattail) Typhaceae:Perennial, May-June, freshwater wetlands |
 Urtica dioica ssp. gracilis (California Nettle) Urticaceae , Perennial , May-Sept: riparian |
 Urtica dioica ssp. holosericea (Hoary Nettle ), Urticaceae, Perennial:Jun-Sept, woodland, forest, riparian, freshwater wetaland |
 Aesculus californica(California Buckeye), Sapindaceae: Tree, May-July, foothill |