Delphinium luteum—Yellow larkspur. included in the CNPS Inventory of Rare and Endangered Plants on list 1B.1 (rare, threatened, or endangered in CA and elsewhere). The species is also listed by the State of California as Rare and by the Federal Government as 'Endangered '. Less than 10 populations exist, mostly on private land in Sonoma and, possibly Marin, Counties. The purity of the strains in Marin County has been questioned. Photographed at Regional Parks Botanic Garden located in Tilden Regional Park near Berkeley, CA.