Layia pentachaeta
Layia heterotricha
Sierra layia, Sierra tidy tips
pale-yellow layia, paleyellow tidytips
not purple-streaked.
not purple-streaked.
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.
blades elliptic to ovate, 10–120 mm, margins (basal leaves) entire or shallowly toothed.
± hemispheric, 5–12 × 2–12+ mm.
hemispheric, 7–12 × 6–13+ mm.
3–14;
laminae yellow or white, 3–26 mm.
7–13;
laminae white to cream, 5–24 mm.
7–120+;
corollas 3–6 mm;
anthers yellow to brownish.
40–90+;
corollas 4–7 mm;
anthers yellow to brownish.
4–14, apices shorter or longer than folded bases.
7–13, apices usually shorter than folded bases.
glabrous.
usually glabrous, sometimes sparsely hairy.
in 1 series between ray and disc florets.
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.
pappi 0, or (readily falling as units) of 14–20 white, ± equal bristles or setiform scales 3–6 mm, each proximally plumose, not adaxially woolly.
= 16.
Layia pentachaeta
Layia heterotricha
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.)
Of conservation concern.
Layia heterotricha occurs in the South Coast Ranges, western Transverse Ranges, and Tehachapi Range. Molecular phylogenetic data have indicated that L. heterotricha is sister to all other members of Layia (B. G. Baldwin 1996). Weak, ± sterile artificial hybrids have been produced with other species of Layia (no natural hybrids have been reported; 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
