Layia hieracioides
Layia gaillardioides
hawkweed layia, tall tidytips
woodland layia, woodland tidytips
purple-streaked.
purple-streaked.
blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
blades oblanceolate or lanceolate to linear, 5–120 mm, margins (basal leaves) toothed to pinnatifid.
± ellipsoid to obconic, 4–9 × 4–9+ mm.
subglobose to ± campanulate or hemispheric, 4–9+ × 4–12+ mm.
6–16;
laminae yellow, 1–4 mm.
6–18;
laminae yellow or bicolored (proximally yellow, distally whitish or pale yellow), 3.5–18 mm.
9–80;
corollas 2.5–4.5 mm;
anthers ± dark purple.
14–100+;
corollas 3–5 mm;
anthers ± dark purple.
6–16, apices shorter than folded bases.
6–18, apices shorter 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 0 or of 15–24 white to rufous or purplish, ± equal bristles or setiform scales 1–4 mm, each proximally plumose, not adaxially woolly.
= 16, 32.
= 16.
Layia hieracioides
Layia gaillardioides
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 gaillardioides occurs on the North Coast and in the North Coast Ranges, San Francisco Bay area, and Inner South Coast Ranges, and in the Outer South Coast Ranges (near Cayucos). As treated here (provisionally) and previously, L. gaillardioides is not monophyletic; molecular phylogenetic data have indicated that some lineages of L. gaillardioides are more closely related to L. carnosa, L. hieracioides, and/or L. septentrionalis than to one another (B. G. Baldwin, unpubl.).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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