Wyethia Nuttall (Q2805)
Wyethia is a taxon with the rank genus within the tribe Heliantheae
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Wyethia Nuttall
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Wyethia is a taxon with the rank genus within the tribe Heliantheae
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Statements
taxon/id/Wyethia Nuttall
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Wyethia Nuttall
Wyethia
Nuttall
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 erect (or bending erect from bases), branched mostly from bases.
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usually petiolate (basal), sometimes sessile;
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blades (usually pinnately nerved, basal larger than cauline) ± deltate, elliptic-ovate, lanceolate, lance-elliptic, lance-linear, or oblong-ovate, bases truncate to cuneate, margins usually entire, rarely dentate to serrate (sometimes ciliate), faces glabrous or hairy (sometimes glanddotted or finely stipitate-glandular).
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Heads radiate, borne singly or 2–5 (–8+) in ± corymbiform to racemiform arrays.
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Involucres hemispheric to campanulate or turbinate, 12–60+ mm diam.
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Phyllaries persistent, 12–36 (–48) in 2–3+ series (subequal to unequal, outer sometimes foliaceous, much larger than inner).
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Receptacles flat to convex, paleate (paleae conduplicate, at least bases, papery).
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Ray-florets 5–25+, pistillate, fertile;
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corollas mostly yellow (cream to white in W. helianthoides).
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Disc-florets 35–150+, bisexual, fertile;
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corollas yellow, tubes much shorter than cylindric throats;
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lobes 5, ± deltate to lanceolate (style-branches stigmatic in 2 barely distinct lines, appendages ± filiform).
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Cypselae ± prismatic, weakly 3–4-angled (faces glabrous or hairy);
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pappi 0, or persistent, coroniform (usually lacerate) or of 1–4+ ovate to subulate, erose to lacerate (often basally connate) scales.
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hemispheric
campanulate or turbinate
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of 1-4+ ovate to subulate , erose to lacerate scales
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