Tonestus A. Nelson (Q2521)
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Tonestus is a taxon with the rank genus within the tribe Astereae
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| English |
Tonestus A. Nelson
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Tonestus is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Tonestus A. Nelson
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Tonestus A. Nelson
Tonestus
A. Nelson
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
accepted
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Stems erect, simple, hairy and/or ± densely stipitate-glandular.
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petiolate (basal and cauline) or sessile (cauline);
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basal blades 1-nerved, 3-nerved, or 5-nerved, linear to broadly spatulate, cauline progressively reduced distally (bases ± clasping), margins entire, coarsely and irregularly serrate, dentate, or lobed, sometimes ciliate, faces glabrous or scabrous, eglandular or stipitate-glandular.
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Heads radiate or discoid, in usually racemiform, sometimes corymbiform arrays.
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Involucres narrowly to broadly campanulate, (5–28 ×) 6–20 mm.
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Phyllaries 16–34 (–44) in 3–4 (–5) series, usually green, sometimes anthocyanic, 1-nerved or weakly 3–5-nerved (flat), equal to unequal, sometimes chartaceous proximally, margins ciliolate or eciliate, faces often stipitate-glandular at least distally;
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inner linear to narrowly oblong, margins scarious, fimbriate (apices acute to acuminate, sometimes reflexed), faces sometimes stipitate-glandular distally.
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Receptacles convex, pitted, epaleate.
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Ray-florets 0, or 10–23 (–35), pistillate, fertile;
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corollas yellow (tubes sparsely hairy, laminae narrowly elliptic, coiling at maturity).
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Disc-florets 13–66, bisexual, fertile;
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corollas yellow, tubes (glabrous or sparsely hairy) shorter than narrowly funnelform to ± ampliate throats, lobes 5, erect or spreading, deltate to broadly lanceolate;
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style-branch appendages subulate to lanceolate.
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Cypselae cylindric to linear, terete, 4–12-nerved, faces glabrous or villous;
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pappi persistent, of 30–60 whitish, ± equal, brittle or flexible, fine, barbellate, apically attenuate bristles in 1 series (± equaling corollas).
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stipitate-glandular
more or less densely
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reduced
progressively; distally
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stipitate-glandular
often; at-least distally; distally
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stipitate-glandular
sometimes; distally
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of 30-60 whitish; more or less
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