Crocidium Hooker (Q2878)
Crocidium is a taxon with the rank genus within the tribe Senecioneae
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Crocidium Hooker
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Crocidium is a taxon with the rank genus within the tribe Senecioneae
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Statements
taxon/id/Crocidium Hooker
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Crocidium Hooker
Crocidium
Hooker
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 usually 1, erect, simple or branched near bases.
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petiolate (basal) or sessile;
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blades palmately nerved, spatulate or oblanceolate (basal) to lanceolate or linear, margins toothed or entire, faces glabrous or glabrate.
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Heads radiate, borne singly.
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Involucres ± hemispheric, 3–6+ mm diam.
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Phyllaries (veiny, often purple-tipped, each subtending a ray-floret) persistent, 5–13+ in 1 (–2) series, erect (reflexed in fruit), basally connate, elliptic to ovate, subequal, margins herbaceous to membranous.
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Receptacles dome-shaped to conic (heights equaling or greater than diameters), smooth, epaleate.
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Ray-florets 5–13+, pistillate and fertile or neuter;
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corollas yellow (laminae conspicuous).
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Disc-florets 12–60 (–120+), bisexual, fertile;
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corollas yellow, tubes ± cylindric, longer than or equaling campanulate to cylindric throats, lobes 5, erect to spreading, deltate to lanceolate;
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style-branches stigmatic in 2 lines, apices truncate-penicillate.
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Cypselae (stramineous to reddish-brown) ± ellipsoid to fusiform, 5 (–6) -nerved, ± papillate-hairy between nerves (papillae mucilaginous when wetted);
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pappi fragile or readily falling, usually of 20–40, white, barbellulate bristles (in 1 series), sometimes 0 on ray cypselae.
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oblanceolate
lanceolate or linear
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papillate-hairy
more or less
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