Stenotus acaulis
Encyclopedia
Stenotus acaulis is a species of flowering plant in the aster family
Asteraceae
The Asteraceae or Compositae , is an exceedingly large and widespread family of vascular plants. The group has more than 22,750 currently accepted species, spread across 1620 genera and 12 subfamilies...

 known by the common name stemless mock goldenweed. It is native to the western United States, where it grows in rocky soils in sagebrush plateau and mountain habitats. It is a perennial herb usually forming a compact tuft or mat of hairless to hairy and sometimes glandular herbage. The linear to widely lance-shaped leaves are up to 8 or 10 centimeters long with rigid, hair-lined edges. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 is a solitary flower head
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....

or small cluster of a few heads. The flower head contains yellow disc florets and several yellow ray florets each about a centimeter long.

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