Twisselmannia californica Al-Shehbaz Tropidocarpum californicum, the king's gold,[2] is a plant species endemic to a small region in California.

It is known from only Kern and King counties in the southern part of the San Joaquin Valley.

[3] Tropidocarpum californicum is an ascending or decumbent herb up to 25 cm tall.

Leaves are up to 6 cm long, getting smaller the further up the stem.

Flowers are yellow.