Lessingia micradenia is a rare species of flowering plant in the family Asteraceae known by the common name Mt.

The species is divided into two rare varieties, each with a limited occurrence on opposite sides of the Bay Area.

glabrata is found in several locations across Santa Clara County south of San Jose, while var.

micradenia is known only from a few spots around Mount Tamalpais in Marin County.

This is a slender annual herb growing erect and varying in size from just a few centimeters to over half a meter tall, with spreading branches.