Layia pentachaeta |
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Sierra layia, Sierra tidy tips |
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Habit | Plants 5–100 cm (self-incompatible); glandular, strongly lemon- or acrid-scented. | ||||
Stems | not purple-streaked. |
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Leaf | blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid. |
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Involucres | ± hemispheric, 5–12 × 2–12+ mm. |
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Ray florets | 3–14; laminae yellow or white, 3–26 mm. |
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Disc florets | 7–120+; corollas 3–6 mm; anthers yellow to brownish. |
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Phyllaries | 4–14, apices shorter or longer than folded bases. |
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Ray cypselae | glabrous. |
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Paleae | in 1 series between ray and disc florets. |
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Disc | pappi 0 or of 1–22 whitish, ± equal, setiform scales 1.5–3.5 mm, each proximally plumose, seldom adaxially woolly. |
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Layia pentachaeta |
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Distribution |
CA
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Discussion | Subspecies 2 (2 in the flora). Molecular phylogenetic data have indicated that Layia pentachaeta is closely related to L. glandulosa and L. discoidea (B. G. Baldwin, unpubl.). Distributions of L. pentachaeta and L. glandulosa overlap broadly; the two species occur in different habitats and natural hybridization has been rarely detected (first-generation hybrids are of low to moderate fertility; J. Clausen 1951). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 266. | ||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia | ||||
Sibling taxa | |||||
Subordinate taxa | |||||
Name authority | A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 108. (1857) | ||||
Web links |