Trifolium jokerstii

Trifolium jokerstii is a rare species of clover known by the common names Jim's clover[1] and Butte County golden clover. It is endemic to Butte County, California, where it is known from eight or nine occurrences near Oroville.[2] It grows in seasonally moist habitat, such as vernal pools, pastures, and ephemeral creeks.[3] It was previously included within the description of Trifolium barbigerum as an odd yellow-flowered variant of a mostly purple-pink-flowered species, and was elevated to species status in 1998.[4] It was named for the California botanist Jim Jokerst.[5]

Trifolium jokerstii

Critically Imperiled  (NatureServe)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Genus: Trifolium
Species:
T. jokerstii
Binomial name
Trifolium jokerstii
Vincent & R.Morgan

This is an annual herb with a decumbent or erect, hairless stem. The leaves are made up of oval blades up to about 3 centimeters 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.

References
  1. "Trifolium jokerstii". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.
  2. California Native Plant Society Rare Plant Profile
  3. The Nature Conservancy
  4. Vincent, M. A. and R. Morgan. (1998). Trifolium jokerstii (Leguminosae, Papilionoideae), a new species from Butte County, California. Novon 8:1 91-3.
  5. CalFlora Botanical Names


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