Layia pentachaeta
Layia pentachaeta subsp. pentachaeta
Sierra layia, Sierra tidy tips
Sierra tidy tips
not purple-streaked.
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.
± hemispheric, 5–12 × 2–12+ mm.
3–14;
laminae yellow or white, 3–26 mm.
yellow.
7–120+;
corollas 3–6 mm;
anthers yellow to brownish.
4–14, apices shorter or longer than folded bases.
glabrous.
in 1 series between ray and disc florets.
pappi 0 or of 1–22 whitish, ± equal, setiform scales 1.5–3.5 mm, each proximally plumose, seldom adaxially woolly.
= 16.
Layia pentachaeta
Layia pentachaeta subsp. pentachaeta
Subspecies 2 (2 in the flora).
Molecular phylogenetic data have indicated that Layia pentachaeta is closely related to L. glandulosa and L. discoidea (B. G. Baldwin, unpubl.). Distributions of L. pentachaeta and L. glandulosa overlap broadly; the two species occur in different habitats and natural hybridization has been rarely detected (first-generation hybrids are of low to moderate fertility; J. Clausen 1951).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies pentachaeta occurs in the Sierra Nevada foothills north of the Tehachapi Range and in the San Joaquin Valley and South Inner Coast Ranges. Putative hybrids with Layia pentachaeta subsp. albida have been collected in the southern Sierra Nevada (e.g., Keck 3258 in UC); artificial, highly fertile hybrids of the same combination have been produced; (J. Clausen 1951).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Ray corollas yellow | subsp. pentachaeta |
1. Ray corollas white | subsp. albida |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
