Lathyrus jepsonii is a species of wild pea known by the common names delta tule pea and Jepson's pea. It is endemic to California, where it grows in a number of habitat types, including forest and estuary. This is a perennial herb with a long, winged stem which climbs by means of branched, coiled tendrils. The leaves are made up of several pairs of lance-shaped leaflets. The plant bears an flower cluster of up to 15 pink or purplish flowers each up to 2 centimeters wide. The fruit is a hairless, dehiscent legume pod. There are two varieties of this species. L. j. var. californicus is a smaller plant which is sometimes hairy, while the rare var. jepsonii can exceed two meters in height and is hairless. The latter is a rare variety which grows in the estuary habitat of the Sacramento-San Joaquin River Delta, the origin of the common name delta tule pea.