Layia hieracioides
Layia septentrionalis
hawkweed layia, tall tidytips
Colusa layia, Colusa tidytips
purple-streaked.
purple-streaked or not.
blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
blades oblanceolate or lanceolate to linear, 4–70 mm, margins (basal leaves) toothed to pinnatifid.
± ellipsoid to obconic, 4–9 × 4–9+ mm.
± ellipsoid to campanulate, 5–12 × 3–12+ mm.
6–16;
laminae yellow, 1–4 mm.
5–9;
laminae yellow, 4–15 mm.
9–80;
corollas 2.5–4.5 mm;
anthers ± dark purple.
10–65+, corollas 5–8 mm;
anthers yellow to brownish.
6–16, apices shorter 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 of 10–16 white to rufous or purplish, ± equal bristles or setiform scales 2–4 mm, each proximally plumose, not adaxially woolly.
pappi of 16–22 white, ± equal bristles or setiform scales 4–7 mm, each proximally plumose and adaxially woolly.
= 16, 32.
= 16.
Layia hieracioides
Layia septentrionalis
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.)
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
WildflowerSearch
iNaturalist
USDA Plants Database
OR
Flora NW
PNW Herbaria
