Coreopsis stillmanii
Encyclopedia
Coreopsis stillmanii is a species of flowering plant in the daisy family
known by the common name Stillman's tickseed. It is endemic to California
, where it grows in the Central Valley and most of the adjacent coastal and inland mountain ranges. This is an annual herb producing one or more erect stems with inflorescence
s growing to 30 centimeters in maximum height. The lobed, somewhat fleshy leaves are mostly located about the base of the plant and on the lower stem. The inflorescence bears a solitary flower head
with a rounded involucre of green to reddish, rough-textured phyllaries
. The flower head has a center of many yellow disc florets and a fringe of 5 to 8 yellow ray florets about a centimeter long on average. The fruit is an achene
.
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 Stillman's tickseed. It is endemic to California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, where it grows in the Central Valley and most of the adjacent coastal and inland mountain ranges. This is an annual herb producing one or more erect stems with 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...
s growing to 30 centimeters in maximum height. The lobed, somewhat fleshy leaves are mostly located about the base of the plant and on the lower stem. The inflorescence bears 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....
with a rounded involucre of green to reddish, rough-textured phyllaries
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture...
. The flower head has a center of many yellow disc florets and a fringe of 5 to 8 yellow ray florets about a centimeter long on average. The fruit is an achene
Achene
An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate and indehiscent...
.