Layia hieracioides
Layia discoidea
hawkweed layia, tall tidytips
rayless layia, rayless tidytips
purple-streaked.
not purple-streaked.
blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
blades oblanceolate or lanceolate to linear, 2–35 mm, margins (basal leaves) lobed.
± ellipsoid to obconic, 4–9 × 4–9+ mm.
cylindric or narrowly obconic to campanulate, 4–7 × 2–6+ mm.
6–16;
laminae yellow, 1–4 mm.
0.
9–80;
corollas 2.5–4.5 mm;
anthers ± dark purple.
5–35+;
corollas 2.5–4 mm;
anthers yellow to brownish.
6–16, apices shorter than folded bases.
0 (“involucres” formed of “paleae”).
glabrous.
0.
in 1 series between ray and disc florets.
in 1 series (interpreted as constituting the involucre).
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 8–15 whitish to tawny, lanceolate to subulate, ± equal (often apically or marginally notched) scales 0.5–1.5 mm, each ± plumose or villous, not adaxially woolly.
= 16, 32.
= 16.
Layia hieracioides
Layia discoidea
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 discoidea occurs in the South Inner Coast Ranges (Fresno and San Benito counties). Artificial hybrids with L. glandulosa are highly fertile (J. Clausen 1951).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
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