Layia pentachaeta
Layia glandulosa
Sierra layia, Sierra tidy tips
white layia, white-daisy tidytips
not purple-streaked.
not purple-streaked (often uniformly dark purple).
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.
blades obovate to linear, 6–100 mm, margins (basal leaves) toothed to lobed.
± hemispheric, 5–12 × 2–12+ mm.
± campanulate to hemispheric, 4–11 × 3–11+ mm.
3–14;
laminae yellow or white, 3–26 mm.
3–14;
laminae often white, sometimes yellow or pale yellow, 3–22 mm.
7–120+;
corollas 3–6 mm;
anthers yellow to brownish.
17–100+;
corollas 3.5–6.5 mm;
anthers yellow to brownish.
4–14, apices shorter or longer than folded bases.
3–14, apices often shorter (sometimes longer) than folded bases.
glabrous.
glabrous.
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 10–15 usually white (rarely tawny), linear-attenuate to subulate, ± equal scales 2–5 mm, each proximally plumose and often adaxially woolly.
= 16.
Layia pentachaeta
Layia glandulosa
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.)
Layia glandulosa occurs in deserts of western North America, extending to the Pacific coast in central and southern California. As treated here (provisionally) and previously, L. glandulosa corresponds to a paraphyletic group; molecular phylogenetic data have indicated that L. discoidea is most closely related to a subset of lineages in L. glandulosa, including yellow-rayed populations previously recognized as subsp. lutea or var. lutea (B. G. Baldwin, unpubl.). Report of L. glandulosa from British Columbia has not been confirmed.
(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
WA
Flora NW
PNW Herbaria
