Layia platyglossa |
Layia pentachaeta |
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coastal tidy tips, tidy-tips |
Sierra layia, Sierra tidy tips |
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Habit | Plants 3–70 cm (self-incompatible); glandular, not strongly scented. | Plants 5–100 cm (self-incompatible); glandular, strongly lemon- or acrid-scented. | ||||
Stems | usually not purple-streaked. |
not purple-streaked. |
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Leaf | blades lanceolate or oblanceolate to linear, 4–100(–120) mm, margins (basal leaves) toothed to pinnatifid. |
blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid. |
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Involucres | hemispheric, 4–18 × 4–15+ mm. |
± hemispheric, 5–12 × 2–12+ mm. |
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Ray florets | 5–18; laminae yellow or proximally yellow and distally white, 3–21 mm. |
3–14; laminae yellow or white, 3–26 mm. |
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Disc florets | 6–120+; corollas 3.5–6 mm; anthers ± dark purple (in southwest of range, sometimes yellow or brownish). |
7–120+; corollas 3–6 mm; anthers yellow to brownish. |
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Phyllaries | 5–18, apices often longer (sometimes shorter) than folded bases. |
4–14, apices shorter or longer than folded bases. |
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Ray cypselae | glabrous or sparsely hairy. |
glabrous. |
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Paleae | in 1 series between ray and disc florets. |
in 1 series between ray and disc florets. |
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Disc | pappi 0 or of 14–32 white to tawny, ± equal bristles or setiform scales 2–5 mm, each ± scabrous, usually not plumose and not adaxially woolly (in southwest of range, often proximally plumose and adaxially woolly). |
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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2n | = 14. |
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Layia platyglossa |
Layia pentachaeta |
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Phenology | Flowering Feb–Jul. | |||||
Habitat | Open, often grassy slopes or flats, disturbed sites, often on sandy or clayey soil, sometimes serpentine | |||||
Elevation | 0–2000 m (0–6600 ft) | |||||
Distribution |
CA; Mexico (Baja California)
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CA
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Discussion | Layia platyglossa occurs from the North Coast Ranges through central-western and southwestern California and west to the immediate coast and east into the central Great Valley. A specimen reported by S. L. Welsh et al. (1993) from dunes in Utah (Harrison 2545, BRY) may be mislabeled. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. 265. | FNA vol. 21, p. 266. | ||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia | Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Callichroa platyglossa, L. platyglossa subsp. campestris, L. ziegleri | |||||
Name authority | (Fischer & C. A. Meyer) A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 103. (1849) | A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 108. (1857) | ||||
Web links |