Euthamia (Nuttall) Cassini in F. Cuvier (Q2248)
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Euthamia is a taxon with the rank genus within the tribe Astereae
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Euthamia (Nuttall) Cassini in F. Cuvier
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Euthamia is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Euthamia (Nuttall) Cassini
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Euthamia (Nuttall) Cassini
Euthamia
(Nuttall) Cassini
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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Perennials or subshrubs, 40–200 cm (rhizomes creeping, fibrous-rooted).
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Stems erect (nearly terete), simple or branched, glabrous or hairy.
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blades (± uniform along stems) linear to lanceolate (40–130 mm), margins entire, faces glabrous or hairy, sparsely to densely gland-dotted (dots obscure or evident, 0.1–0.25 mm diam., 0–86 per mm²).
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Heads radiate, borne singly or (glomerulate) in corymbiform or paniculiform arrays.
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Involucres obconic to hemispheric, (2.5–6.3 ×) 2.1–8.1 mm.
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Phyllaries 11–29 in 3–5 series, 1-nerved (flat), linear to ovate, bases often stramineous or pale, margins chartaceous or weakly cartilaginous, not scarious (apices with green zones, erose to ciliate), abaxial faces glabrous, little to very resinous.
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Receptacles flat, pitted (pit borders ± fimbrillate), epaleate.
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Ray-florets 7–22 (–35) (usually more numerous than disc-florets), pistillate, fertile;
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Disc-florets 3–22, bisexual, fertile;
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corollas yellow, tubes shorter than tubular to slender-funnelform throats, lobes 5, erect to ascending, oblong-lanceolate;
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style-branch appendages lanceolate.
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Cypselae oblong to narrowly ellipsoid, ± terete, 2–4-nerved, strigose;
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pappi persistent, of 20–30, white, ± equal, antrorsely barbellate, apically attenuate bristles in 1 series.
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gland-dotted
sparsely to densely
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in corymbiform or paniculiform arrays
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