Calycadenia hooveri
Encyclopedia
Calycadenia hooveri is a species of flowering plant in the daisy family
known by the common name Hoover's western rosinweed. It is endemic to the Sierra Nevada foothills of central California
, where it grows in rocky areas in the hills.
bears several bract
s, each with a bulbous gland on it. It also bears one or more tiny, glandular flower heads
, each with 1 or 2 disc florets and sometimes 1 or 2 lobed white ray florets. The fruit
is an achene
; those arising from the disc florets may have a pappus
of scales at the tip.
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 Hoover's western rosinweed. It is endemic to the Sierra Nevada foothills of central 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 rocky areas in the hills.
Description
Calycadenia hooveri is an annual herb producing thin, spindly stems 10 to 60 centimeters tall. The leaves are linear in shape and arranged alternately along the stem, especially on the lower part. The largest is up to 8 centimeters long. The inflorescenceInflorescence
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...
bears several bract
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...
s, each with a bulbous gland on it. It also bears one or more tiny, glandular flower heads
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
, each with 1 or 2 disc florets and sometimes 1 or 2 lobed white ray florets. The fruit
Fruit
In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...
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...
; those arising from the disc florets may have 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...
of scales at the tip.