Trifolium gymnocarpon is a species of clover known by the common name hollyleaf clover. It is native to the western United States, from California to New Mexico, and Oregon to Montana. It can be found in many types of habitat, including sagebrush scrub. Trifolium gymnocarpon is a small perennial herb with stems spreading along the ground to form a flat mat or clump. The leaves are each made up of 3 to 5 thick, hairy leaflets with serrated edges. The inflorescence is an umbel of flowers spreading out or flexing downward. The flower is roughly a centimeter long and dull pink or brownish in color. Subspecies. Trifolium gymnocarpon ssp. plummerae - Plummer's clover, an Endangered species within California, but the subspecies is apparently secure, considering populations outside California.