Coreopsis douglasii
Encyclopedia
Coreopsis douglasii is a species of flowering plant in the daisy family
known by the common name Douglas' tickseed. It is endemic to California
where it grows on the slopes of the Transverse Ranges
and the Inner South Coast Ranges adjacent to the western edge of the Central Valley. This is an annual herb producing one or more stems with erect inflorescence
s growing up to about 25 centimeters tall. The slightly fleshy leaves are located mainly around the base of the stem. They are up to 8 centimeters long and linear in shape or divided into linear lobes. The inflorescence bears a single flower head
with a rounded involucre of lance-shaped, pointed phyllaries
. The head has a center of many small yellow disc florets and a fringe of 5 to 8 bright yellow ray florets each usually under a centimeter long. 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 Douglas' 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 on the slopes of the Transverse Ranges
Transverse Ranges
The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region that runs along the Pacific coast from Alaska to Mexico in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie between...
and the Inner South Coast Ranges adjacent to the western edge of the Central Valley. This is an annual herb producing one or more stems with erect 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 up to about 25 centimeters tall. The slightly fleshy leaves are located mainly around the base of the stem. They are up to 8 centimeters long and linear in shape or divided into linear lobes. The inflorescence bears a single 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 lance-shaped, pointed 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 head has a center of many small yellow disc florets and a fringe of 5 to 8 bright yellow ray florets each usually under a centimeter long. 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...
.