Noccaea fendleri ssp. californica

Noccaea fendleri subsp. californica is a rare subspecies of flowering plant in the family Brassicaceae known by the common name Kneeland Prairie penny-cress. It is endemic to California, where it is known from only one stretch of grassland in Humboldt County. It is threatened by development. It is a federally listed endangered species of the United States. The taxonomy of this species is uncertain. Authors call it Thlaspi californicum, Thlaspi montanum var. californicum, Noccaea californica, and Noccaea fendleri ssp. californica, and there are other synonyms. This plant is a perennial herb growing roughly 10 centimeters tall, the height varying from 1 to 20 centimeters. There are spatula-shaped lower leaves a few centimeters long and a few leaves higher on the plant. The inflorescence is a raceme of mustardlike flowers with white spoon-shaped petals just under a centimeter in length. The fruit is a silique. The plant often reproduces vegetatively by cloning. As of 2000 there was only o......read more on Wikipedia.