Jensia yosemitana

Jensia yosemitana is a species of flowering plant in the family Asteraceae known by the common name Yosemite tarweed. 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.
Jensia yosemitana is an annual herb with a slender stem up to 25 centimeters tall. The hairy to bristly leaves are 1 to 3 centimeters 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 long and 1-7 yellow disc florets with black anthers. The fruit is an achene with a bristly or scaly pappus.