Difference between revisions of "Cotula Linnaeus (Q2026)"
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Latest revision as of 12:48, 24 June 2022
Cotula is a taxon with the rank genus within the subtribe Cotulineae
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Cotula Linnaeus
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Cotula is a taxon with the rank genus within the subtribe Cotulineae
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Statements
taxon/id/Cotula Linnaeus
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Cotula Linnaeus
Cotula
Linnaeus
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
accepted
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Stems usually 1, erect or prostrate to decumbent or ascending (sometimes rooting at nodes), usually branched, glabrous or ± strigillose to villous (hairs mostly basifixed).
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Leaves usually mostly cauline [basal];
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petiolate or sessile;
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blades obovate or spatulate to lanceolate or linear, sometimes 1–3-pinnately [palmati-pinnately] lobed, ultimate margins entire or irregularly toothed, faces glabrous or ± strigillose to villous [lanate] (hairs mostly basifixed).
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Heads disciform [discoid or radiate], borne singly (peduncles sometimes dilated).
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Involucres broadly hemispheric to saucer-shaped, 3–12+ [–15+] mm diam.
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Phyllaries persistent, 13–30+ in 2–3+ series, margins and apices (colorless, light to dark-brown, or purplish) scarious.
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Receptacles flat to convex [conic], epaleate (sometimes ± covered with persistent stalks of florets).
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Ray-florets 0 [5–8+, pistillate, fertile; corollas white] (peripheral pistillate florets 8–80+ in 1–3+ series; corollas usually none).
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Disc-florets 12–200+ [–600+], bisexual, fertile [functionally staminate];
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corollas ochroleucous or yellow, tubes ± cylindric (bases sometimes adaxially saccate), throats abruptly ampliate, lobes (3–) 4, ± deltate (sometimes one larger than others, usually each with central resin canal).
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Cypselae obovoid to oblong, obcompressed or flattened, ribs 2, lateral, sometimes becoming wings, faces ± papillate (pericarps relatively thin, sometimes with myxogenic cells and/or 2 lateral resin sacs);
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more or less strigillose
villous
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spatulate
lanceolate or linear
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sometimes 1-3-pinnately
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more or less strigillose
villous
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broadly hemispheric
saucer-shaped
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obovoid
oblong obcompressed or flattened
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obovoid
oblong obcompressed or flattened
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