Trifolium jokerstii is a rare species of clover known by the common names Jim's clover and Butte County golden clover.
Description This is an annual herb with a decumbent or erect, hairless stem. The leaves are made up of oval blades up to about long which are marked with a white or purplish chevron, and large, lance-shaped, toothed stipules. The inflorescence is a head of at least five golden yellow flowers on a bowl-like base of bracts.
Taxonomy The species was previously included within the description of Trifolium barbigerum as an odd yellow-flowered variant of a mostly purple-pink-flowered species. It was elevated to species status in 1998Vincent, M. A. and R. Morgan. (1998). Trifolium jokerstii (Leguminosae, Papilionoideae), a new species from Butte County, California. Novon 8:1 91-3. and was named for the California botanist Jim Jokerst.CalFlora Botanical Names
Distribution and habitat It is endemic to Butte County, California, where it is known from eight or nine occurrences near Oroville.California Native Plant Society Rare Plant Profile It grows in seasonally moist habitat, such as vernal pools, pastures, and ephemeral creeks.
References
External links Calflora: Trifolium jokerstii (Jim's clover) Jepson Manual eFlora (TJM2) treatment of Trifolium jokerstii Species Accounts: Butte County Golden Clover UC CalPhotos gallery: Trifolium jokerstii