Jensia yosemitana

Jensia yosemitana
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Jensia
Species:
J. yosemitana
Binomial name
Jensia yosemitana
Synonyms[1][2]
  • Madia yosemitana Parry ex A.Gray
  • Anisocarpus yosemitanus (Parry ex A.Gray) Greene

Jensia yosemitana is a species of flowering plant in the family Asteraceae known by the common name Yosemite tarweed.[3] 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.[4][5]

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.[6]

  1. ^ Flann, C (ed) 2009+ Global Compositae Checklist
  2. ^ The Plant List, Jensia yosemitana (Parry ex A.Gray) B.G.Baldwin
  3. ^ Baldwin, Bruce G. 1999. New combinations and new genera in the North American Tarweeds (Compositat-Madiinae). Novon 9:462-471
  4. ^ Jepson Manual Treatment
  5. ^ Calflora taxon report, University of California, Jensia yosemitana (Gray) B.G. Baldwin Yosemite tarplant
  6. ^ Flora of North America, Jensia yosemitana (Parry ex A. Gray) B. G. Baldwin. 1999