Stenotus Nuttall (Q2410)
Stenotus is a taxon with the rank genus within the tribe Astereae
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Stenotus Nuttall
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Stenotus is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Stenotus Nuttall
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Stenotus Nuttall
Stenotus
Nuttall
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 (usually white, proximally often clothed with marcescent leaves), simple, glabrous or scabrous, villous, or lanate, eglandular, viscid, or stipitate-glandular.
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blades (whitish proximally, green or grayish distally) 1-nerved or 3-nerved (nerves raised abaxially or not), linear to broadly oblanceolate (rigid or pliable), margins entire, sometimes ciliate, eglandular [glandular], faces glabrous, scabrous, or villous to lanate, viscid or stipitate-glandular.
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Heads radiate [discoid], usually borne singly, sometimes (2–4) in corymbiform arrays.
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Involucres campanulate to hemispheric, ([6–] 9–28 ×) [5–] 6–15 mm.
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Phyllaries 10–37 (–64) in 2–4 series, 1-nerved or 3-nerved (sometimes keeled proximally), lanceolate or oblong to broadly oblanceolate, unequal to equal, indurate proximally, chartaceous or herbaceous distally, margins scarious, entire or fimbriate (apices acute to obtuse or rounded), abaxial faces sometimes villous, viscid, and/or stipitate-glandular.
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Receptacles convex, pitted, epaleate.
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Ray-florets [0] 5–17, pistillate, fertile;
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Disc-florets 14–45, bisexual, fertile;
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corollas yellow, tubes shorter than narrowly funnelform to vase-shaped, or ± ampliate throats, lobes 5, erect, triangular;
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style-branch appendages subulate to lanceolate.
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Cypselae ± prismatic to oblanceoloid or linear, often flattened, 6–12-nerved, faces usually sericeous, sometimes glabrous;
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pappi persistent, of 30–75, whitish, fine, barbellate, apically attenuate bristles in 1 series (spreading at maturity).
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less prismatic
oblanceoloid or linear
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