Layia hieracioides
Layia glandulosa
hawkweed layia, tall tidytips
white layia, white-daisy tidytips
purple-streaked.
not purple-streaked (often uniformly dark purple).
blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
blades obovate to linear, 6–100 mm, margins (basal leaves) toothed to lobed.
± ellipsoid to obconic, 4–9 × 4–9+ mm.
± campanulate to hemispheric, 4–11 × 3–11+ mm.
6–16;
laminae yellow, 1–4 mm.
3–14;
laminae often white, sometimes yellow or pale yellow, 3–22 mm.
9–80;
corollas 2.5–4.5 mm;
anthers ± dark purple.
17–100+;
corollas 3.5–6.5 mm;
anthers yellow to brownish.
6–16, apices shorter 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 of 10–16 white to rufous or purplish, ± equal bristles or setiform scales 2–4 mm, each proximally plumose, not 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, 32.
= 16.
Layia hieracioides
Layia glandulosa
Layia hieracioides occurs in the southern San Francisco Bay area, South Coast Ranges, and Western Transverse Ranges. Diploids and tetraploids are morphologically similar and reportedly geographically distinct, with diploids documented from the San Francisco Bay area and tetraploids (= L. paniculata) documented to the south. Natural, ± sterile hybrids between tetraploid plants and L. glandulosa have been documented from the Central Coast (B. D. Tanowitz and J. W. Adams 1986; R. F. Hoover 8369, UC).
(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.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
OR
WA
Flora NW
PNW Herbaria
