Layia pentachaeta
Layia discoidea
Sierra layia, Sierra tidy tips
rayless layia, rayless tidytips
not purple-streaked.
not purple-streaked.
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.
blades oblanceolate or lanceolate to linear, 2–35 mm, margins (basal leaves) lobed.
± hemispheric, 5–12 × 2–12+ mm.
cylindric or narrowly obconic to campanulate, 4–7 × 2–6+ mm.
3–14;
laminae yellow or white, 3–26 mm.
0.
7–120+;
corollas 3–6 mm;
anthers yellow to brownish.
5–35+;
corollas 2.5–4 mm;
anthers yellow to brownish.
4–14, apices shorter or longer than folded bases.
0 (“involucres” formed of “paleae”).
glabrous.
0.
in 1 series between ray and disc florets.
in 1 series (interpreted as constituting the involucre).
pappi 0 or of 1–22 whitish, ± equal, setiform scales 1.5–3.5 mm, each proximally plumose, seldom adaxially woolly.
pappi of 8–15 whitish to tawny, lanceolate to subulate, ± equal (often apically or marginally notched) scales 0.5–1.5 mm, each ± plumose or villous, not adaxially woolly.
= 16.
Layia pentachaeta
Layia discoidea
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 discoidea occurs in the South Inner Coast Ranges (Fresno and San Benito counties). Artificial hybrids with L. glandulosa are highly fertile (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
