Layia jonesii
Encyclopedia
Layia jonesii is a species of flowering plant in the daisy family
known by the common name Jones' tidytips, or Jones' layia.
It is endemic to California
, where it is known only from coastal San Luis Obispo County
. It grows on clay and serpentine soil
s.
The flower head
has an urn-shaped base of rough, hairy phyllaries
. The face has a fringe of yellow ray florets with white tips and a center of yellow disc florets with purple anthers
. The fruit is an achene
; the fruits of the disc florets sometimes have 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 Jones' tidytips, or Jones' layia.
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 is known only from coastal San Luis Obispo County
San Luis Obispo County, California
San Luis Obispo County is a county located along the Pacific Ocean in the Central Coast of the U.S. state of California, between Los Angeles and the San Francisco Bay Area. As of the 2010 census its population was 269,637, up from 246,681 at the 2000 census...
. It grows on clay and serpentine soil
Serpentine soil
A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle....
s.
Description
This is an annual herb growing a glandular but unscented stem to a maximum height near half a meter. The fleshy leaves are linear to lance-shaped, with the lower ones often having lobes and reaching near 7 centimeters in maximum length.The flower head
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
has an urn-shaped base of rough, 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 face has a fringe of yellow ray florets with white tips and a center of yellow disc florets with purple anthers
Stamen
The stamen is the pollen producing reproductive organ of a flower...
. 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 fruits of the disc florets sometimes 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.