Coreopsis calliopsidea
Encyclopedia
Coreopsis calliopsidea is a species of flowering plant in the daisy family
known by the common name leafstem tickseed. It is endemic to California
where it grows in some of the southern coastal mountain ranges and the Mojave Desert
. This is an annual herb producing one or more stems with erect inflorescence
s growing up to about 40 centimeters tall, or sometimes taller. The slightly fleshy leaves are located mainly around the base of the stem, each divided into several narrow lobes. The inflorescence bears a single flower head
with a bell-shaped involucre of triangular phyllaries
. The head has a center of up to 50 tiny yellow disc florets and a fringe of usually 8 bright yellow ray florets each up to 3.5 centimeters long. The fruit is an achene
. The fruit of the ray floret is oval and hairless and lacks a pappus
; that of the disc floret is more slender, shiny, lined with hairs, and tipped with a pappus of scales.
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 leafstem 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 some of the southern coastal mountain ranges and the Mojave Desert
Mojave Desert
The Mojave Desert occupies a significant portion of southeastern California and smaller parts of central California, southern Nevada, southwestern Utah and northwestern Arizona, in the United States...
. 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 40 centimeters tall, or sometimes taller. The slightly fleshy leaves are located mainly around the base of the stem, each divided into several narrow 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 bell-shaped involucre of triangular 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 up to 50 tiny yellow disc florets and a fringe of usually 8 bright yellow ray florets each up to 3.5 centimeters 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...
. The fruit of the ray floret is oval and hairless and lacks a pappus
Pappus (flower structure)
The pappus is the modified calyx, the part of an individual disk, ray or ligule floret surrounding the base of the corolla, in flower heads of the plant family Asteraceae. The pappus may be composed of bristles , awns, scales, or may be absent. In some species, the pappus is too small to see...
; that of the disc floret is more slender, shiny, lined with hairs, and tipped with a pappus of scales.