Arnoglossum Rafinesque (Q2874)
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Arnoglossum is a taxon with the rank genus within the tribe Senecioneae
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English |
Arnoglossum Rafinesque
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Arnoglossum is a taxon with the rank genus within the tribe Senecioneae
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Statements
taxon/id/Arnoglossum Rafinesque
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Arnoglossum Rafinesque
Arnoglossum
Rafinesque
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 (unbranched proximal to heads).
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petiolate or sessile;
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blades palmately nerved, mostly cordate, deltate, elliptic, hastate, ovate, or reniform, sometimes lanceolate or lance-linear, margins entire, ± dentate to denticulate, sinuate, or lobed, faces usually glabrous.
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Heads discoid, in corymbiform arrays.
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Involucres cylindric to turbinate, 2.5–5 mm diam.
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Phyllaries persistent, 5 in 1–2 series, erect (spreading in fruit), distinct, ovate or oblong to linear (midveins sometimes winged), ± equal, margins scarious (hyaline).
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Receptacles flat or convex (usually with central cusp 0.5–2 mm), foveolate, epaleate.
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Disc-florets 5, bisexual, fertile;
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corollas usually creamy or greenish white, rarely purplish distally, tubes longer than to equaling campanulate to funnelform throats, lobes 5, spreading or recurved, lanceolate;
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style-branches: stigmatic areas continuous, apices truncate or truncate-penicillate (appendages essentially 0).
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Cypselae clavate, cylindric, ellipsoid, or ± fusiform, (4–) 10–15-ribbed or nerved, glabrous (resinous);
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pappi persistent, fragile, or readily falling, of 100–120+, white, smooth or barbellate bristles.
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less dentate
denticulate sinuate or lobed
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less dentate
denticulate sinuate or lobed
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less dentate
denticulate sinuate or lobed
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