Erigeron mariposanus is a rare species of flowering plant in the family Asteraceae known by the common names foothill fleabane, Mariposa daisy, or Mariposa erigeron. It has been found only in a few locations in Mariposa County in California. Some sources say that it is now probably extinct.Calfora taxon report, University of California, Erigeron mariposanus Congdon, Mariposa daisyBiota of North America Program 2014 county distribution map
Erigeron mariposanus is a perennial herb up to 28 centimeters (11 inches) tall, producing a woody taproot. The leaves and the stem are covered with hairs. The plant generally produces 1-4 flower heads per stem, each head with up to 22 blue ray florets surrounding numerous yellow disc florets.Flora of North America, Erigeron mariposanus Congdon, Erythea. 7: 185. 1900. Foothill fleabane
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