Trifolium jokerstii

Trifolium jokerstii
Imperiled
Imperiled (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Trifolium
Species:
T. jokerstii
Binomial name
Trifolium jokerstii
Vincent & R.Morgan

Trifolium jokerstii is a rare species of clover known by the common names Jim's clover[2] 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 3 centimeters (1+1⁄4 in) 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 1998[3] and was named for the California botanist Jim Jokerst.[4]

Distribution and habitat

It is endemic to Butte County, California, where it is known from eight or nine occurrences near Oroville.[5] It grows in seasonally moist habitat, such as vernal pools, pastures, and ephemeral creeks.[6]

References

  1. ↑ "NatureServe Explorer 2.0".
  2. ↑ NRCS. "Trifolium jokerstii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 15 December 2015.
  3. ↑ Vincent, M. A. and R. Morgan. (1998). Trifolium jokerstii (Leguminosae, Papilionoideae), a new species from Butte County, California. Novon 8:1 91-3.
  4. ↑ CalFlora Botanical Names
  5. ↑ California Native Plant Society Rare Plant Profile
  6. ↑ The Nature Conservancy[link removed]


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