Holozonia
Encyclopedia
Holozonia is a monotypic genus of flowering plants in the daisy family
containing the single species Holozonia filipes, which is known by the common name whitecrown. It is endemic to California
, where it grows in a variety of habitats in the central part of the state. This is a scraggly rhizomatous
perennial herb growing a hairy, glandular, branching stem 30 centimeters to 1.5 meters long. The lower stem is gray-green and the upper stem branches are green to red in color. The lance-shaped leaves are up to 9 or 10 centimeters long and covered in resin glands. They are arranged oppositely on the lower part of the stem. The flower heads
appear at the ends of the stem branches in a loose inflorescence
. Each has layers of sticky, hairy phyllaries
. The ray florets are each divided into long lobes and are white in color. The disc florets are white with large purple anthers
.
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...
containing the single species Holozonia filipes, which is known by the common name whitecrown. 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 a variety of habitats in the central part of the state. This is a scraggly rhizomatous
Rhizome
In botany and dendrology, a rhizome is a characteristically horizontal stem of a plant that is usually found underground, often sending out roots and shoots from its nodes...
perennial herb growing a hairy, glandular, branching stem 30 centimeters to 1.5 meters long. The lower stem is gray-green and the upper stem branches are green to red in color. The lance-shaped leaves are up to 9 or 10 centimeters long and covered in resin glands. They are arranged oppositely on the lower part of the stem. The flower heads
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
appear at the ends of the stem branches in a loose 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...
. Each has layers of sticky, hairy 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 ray florets are each divided into long lobes and are white in color. The disc florets are white with large purple anthers
Stamen
The stamen is the pollen producing reproductive organ of a flower...
.