Layia Hooker & Arnott ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle (Q2862)
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Layia is a taxon with the rank genus within the tribe Madieae
| Language | Label | Description | Also known as |
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| English |
Layia Hooker & Arnott ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
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Layia is a taxon with the rank genus within the tribe Madieae
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Statements
taxon/id/Layia Hooker & Arnott ex de Candolle
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Layia Hooker & Arnott ex de Candolle
Layia
Hooker & Arnott ex de Candolle
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
accepted
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Stems usually ± erect (prostrate in L. chrysanthemoides and L. platyglossa of coastal bluffs).
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Leaves mostly cauline;
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blades ovate, lanceolate, or oblanceolate to linear, sometimes 1–2-pinnatifid, ultimate margins toothed or entire, faces glabrous or hirsute to strigose (distal leaves sometimes stipitate-glandular as well).
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Heads usually radiate (discoid in L. discoidea), borne singly or in ± corymbiform arrays.
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Peduncular bracts: pit-glands, tack-glands, and/or spines 0.
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Involucres ± hemispheric, campanulate, cylindric, ellipsoid, obconic, or urceolate, 2–15+ mm diam.
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Phyllaries 0 (then outer paleae functioning as phyllaries, in L. discoidea), or 3–27 in 1 (–2) series (lanceolate to lance-attenuate or oblanceolate, herbaceous, each usually wholly enveloping a subtended ray ovary, abaxially hirsute to strigose or scabrous, sometimes glandular).
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Receptacles flat to convex, setulose, paleate (paleae falling, in 1 series, between rays and discs or subtending ± all disc-florets, distinct, phyllary-like, more scarious).
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Ray-florets 0 or 3–27, pistillate, fertile;
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corollas yellow, cream, white, or bicolored.
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Disc-florets 5–120+, bisexual, fertile;
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corollas yellow, tubes shorter than funnelform throats, lobes 5, deltate (anthers ± dark purple or yellow to brownish; styles glabrous proximal to branches).
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Ray cypselae obcompressed, clavate (± arcuate to falcate, basal attachments central, apices beakless, faces glabrous or sparsely hairy);
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Disc cypselae ± clavate (usually ± strigose to sericeous, sometimes glabrous);
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pappi 0 or of 1–32 elliptic, lance-attenuate, ovate, setiform, or subulate, glabrous, scabrous, or plumose scales or bristles (often each basally villous and/or adaxially woolly).
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in more or less corymbiform arrays
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