Layia chrysanthemoides
Layia septentrionalis
smooth tidy tips
Colusa layia, Colusa tidytips
not purple-streaked.
purple-streaked or not.
blades lanceolate or oblanceolate to linear, 5–120 mm, margins (basal leaves) lobed to pinnatifid.
blades oblanceolate or lanceolate to linear, 4–70 mm, margins (basal leaves) toothed to pinnatifid.
hemispheric or depressed-hemispheric, 4–12 × 4–14+ mm.
± ellipsoid to campanulate, 5–12 × 3–12+ mm.
6–16;
laminae usually proximally yellow, distally white or light yellow, rarely uniformly yellow throughout, 3–18(–24) mm.
5–9;
laminae yellow, 4–15 mm.
28–100+;
corollas 3–5 mm;
anthers ± dark purple.
10–65+, corollas 5–8 mm;
anthers yellow to brownish.
6–16, apices often longer (sometimes shorter) than folded bases.
5–9, apices usually shorter than folded bases.
glabrous.
glabrous or sparsely hairy.
subtending ± all disc florets.
in 1 series between ray and disc florets.
pappi 0 or of 2–18 tawny, subulate to setiform, unequal scales 1–4 mm, each ± scabrous, not adaxially woolly.
pappi of 16–22 white, ± equal bristles or setiform scales 4–7 mm, each proximally plumose and adaxially woolly.
= 16.
= 16.
Layia chrysanthemoides
Layia septentrionalis
Layia chrysanthemoides occurs from the western Great Valley to the coast in northern and central California. Molecular and morphologic data have indicated that L. chrysanthemoides is most closely related to L. fremontii (B. G. Baldwin, unpubl.); the two species are reportedly highly interfertile (natural hybrids have not been reported; 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.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
