Layia pentachaeta
Layia septentrionalis
Sierra layia, Sierra tidy tips
Colusa layia, Colusa tidytips
not purple-streaked.
purple-streaked or not.
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.
blades oblanceolate or lanceolate to linear, 4–70 mm, margins (basal leaves) toothed to pinnatifid.
± hemispheric, 5–12 × 2–12+ mm.
± ellipsoid to campanulate, 5–12 × 3–12+ mm.
3–14;
laminae yellow or white, 3–26 mm.
5–9;
laminae yellow, 4–15 mm.
7–120+;
corollas 3–6 mm;
anthers yellow to brownish.
10–65+, corollas 5–8 mm;
anthers yellow to brownish.
4–14, apices shorter or longer than folded bases.
5–9, apices usually shorter than folded bases.
glabrous.
glabrous or 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 of 16–22 white, ± equal bristles or setiform scales 4–7 mm, each proximally plumose and adaxially woolly.
= 16.
Layia pentachaeta
Layia septentrionalis
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 septentrionalis occurs in the central and southern Inner North Coast Ranges and the Sutter Buttes (southern Sacramento Valley).
(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
OR
Flora NW
PNW Herbaria
