Difference between revisions of "Omalotheca Cassini in F. Cuvier (Q2686)"
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Latest revision as of 12:48, 24 June 2022
Omalotheca is a taxon with the rank genus within the tribe Gnaphalieae
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Omalotheca Cassini in F. Cuvier
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Omalotheca is a taxon with the rank genus within the tribe Gnaphalieae
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Statements
taxon/id/Omalotheca Cassini
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Omalotheca Cassini
Omalotheca
Cassini
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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three species reaching North America in native distribution (Omalotheca sylvatica perhaps not native)
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three species reaching North America in native distribution (see below)
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Stems usually 1, erect (branched from bases or distally, woolly-tomentose to sericeous).
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blades mostly narrowly lanceolate to oblanceolate, bases cuneate, margins entire, faces bicolor or concolor, abaxial white to gray, thinly tomentose, adaxial white to grayish and sericeous to thinly woolly or greenish and glabrate.
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Heads disciform, in spiciform or subcapitate arrays.
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Involucres campanulate to turbinate, 5–6 mm.
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Phyllaries in 2–3 series, stramineous to brownish (sometimes mottled; hyaline, stereomes not glandular), unequal, chartaceous toward apices.
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Receptacles flat to concave, smooth, epaleate.
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Peripheral (pistillate) florets 35–70+ (more numerous than bisexual);
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corollas purplish or whitish.
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Inner (bisexual) florets 3–4;
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corollas purplish or whitish, distally purplish or reddish.
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Cypselae obovoid to cylindric or fusiform, sometimes slightly compressed, faces strigillose (hairs not myxogenic, lengths 6–12 times diams.) and papillate (carpopodia forming minute stipes);
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pappi falling readily, of 15–25 distinct (falling separately) or basally connate (falling together), barbellate bristles in 1 series.
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mostly narrowly lanceolate
oblanceolate
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obovoid
cylindric or fusiform
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compressed
sometimes slightly
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