Hymenoxys Cassini in F. Cuvier (Q2707)
Hymenoxys is a taxon with the rank genus within the tribe Helenieae
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Hymenoxys Cassini in F. Cuvier
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Hymenoxys is a taxon with the rank genus within the tribe Helenieae
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Statements
taxon/id/Hymenoxys Cassini
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Hymenoxys Cassini
Hymenoxys
Cassini
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 1–30+, erect, unbranched or branched, green throughout to purple-red-tinted proximally or distally to purple-red-tinted throughout, glabrous or ± hairy.
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blades simple or 1–2-pinnately lobed, ultimate margins entire or toothed, faces glabrous or hairy, usually ± glanddotted (often in pits).
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Heads radiate [discoid], borne singly or in paniculiform to corymbiform arrays.
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Involucres subhemispheric, hemispheric, globoid, campanulate, or urceolate, (2.5–) 6–32 mm diam.
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Phyllaries persistent (or inner falling), usually (6–) 16–30 (–40) in 2 series and unequal, sometimes 28–50 in 2–3 series and subequal (usually spreading to erect in fruit).
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Receptacles usually hemispheric, globoid, ovoid, or conic (flat in H. ambigens), smooth or pitted, epaleate.
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Ray-florets usually (3–) 8–13 (–16), sometimes 14–34 [0], pistillate, fertile;
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corollas (usually withering after flowering, falling early or tardily) yellow or yellow-orange to orange (laminae fan-shaped, lobes 3–5).
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Disc-florets usually 25–150 (–400+), usually bisexual and fertile (6–15, functionally staminate in H. ambigens);
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corollas yellow to yellowbrown proximally, yellow distally, tubes shorter than cylindric to cylindric-campanulate throats, lobes 5, ± deltate.
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Cypselae obconic or obpyramidal, glabrous or hairy;
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pappi 0, or persistent, of 2–11 (–15) usually aristate scales.
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proximally or
distally purple-red-tinted
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in paniculiform to corymbiform arrays
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