Jensia yosemitana is a species of flowering plant in the family Asteraceae known by the common name Yosemite tarweed.Baldwin, Bruce G. 1999. New combinations and new genera in the North American Tarweeds (Compositat-Madiinae). Novon 9:462-471 It is endemic to California, where it has a scattered distribution across the Sierra Nevada and its foothills. Some of the populations lie inside Yosemite National Park.Jepson Manual TreatmentCalflora taxon report, University of California, Jensia yosemitana (Gray) B.G. Baldwin Yosemite tarplant
Jensia yosemitana is an annual herb with a slender stem up to 25 centimeters (10 inches) tall. The hairy to bristly leaves are 1 to 3 centimeters (0.4-1.2 inches) long and located all along the stem. The inflorescence produces flower heads on thin, threadlike peduncles. The head generally has 2-8 yellow ray florets each about 2 millimeters (0.08 inches) long and 1-7 yellow disc florets with black anthers. The fruit is an achene with a bristly or scaly pappus.Flora of North America, Jensia yosemitana (Parry ex A. Gray) B. G. Baldwin. 1999
References
External links United states Department of Agriculture Plants Profile Calphotos Photo gallery, University of California