Layia hieracioides
Layia munzii
hawkweed layia, tall tidytips
Munz's tidy-tips
purple-streaked.
not purple-streaked.
blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
blades oblanceolate to linear, 5–60 mm, margins (basal leaves) lobed.
± ellipsoid to obconic, 4–9 × 4–9+ mm.
hemispheric to ± urceolate, 5–9 × 5–10+ mm.
6–16;
laminae yellow, 1–4 mm.
6–15;
laminae proximally yellow, distally white, 3–14 mm.
9–80;
corollas 2.5–4.5 mm;
anthers ± dark purple.
16–100+;
corollas 3.5–5 mm;
anthers ± dark purple.
6–16, apices shorter than folded bases.
6–15, apices shorter or longer 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 9–12 whitish, lance-linear, attenuate, ± equal scales 2–3.5 mm, each ± scabrous, not plumose, not adaxially woolly (bases sparsely setose).
= 16, 32.
= 14.
Layia hieracioides
Layia munzii
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 munzii occurs in the southern San Joaquin Valley and South Inner Coast Ranges. Populations are evident only in some wet years, when dense stands may be found, sometimes near L. platyglossa (natural hybrids have not been reported; artificial hybrids have reduced fertility; J. Clausen 1951).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
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