Tetraneuris Greene (Q2711)
Tetraneuris is a taxon with the rank genus within the tribe Helenieae
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Tetraneuris Greene
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Tetraneuris is a taxon with the rank genus within the tribe Helenieae
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Statements
taxon/id/Tetraneuris Greene
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Tetraneuris Greene
Tetraneuris
Greene
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 1–60, erect or ± decumbent, unbranched or sparingly branched distally.
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petiolate or sessile;
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blades (usually with distinct midribs) mostly oblanceolate to linear or filiform, sometimes lobed, ultimate margins usually entire, sometimes toothed, faces glabrous or ± hairy, eglandular or ± glanddotted.
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Heads radiate or discoid, borne singly or in paniculiform to corymbiform or fastigiate arrays.
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Involucres hemispheric to campanulate 6–20 mm diam.
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Phyllaries 11–60+ in 3 series (mostly spreading to erect in fruit, distinct, herbaceous; outer with or without scarious margins, abaxial faces ± hairy; mid usually same number as, alternating with, and similar to outer, almost always with ± scarious margins; inner narrower than others, margins scarious).
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Receptacles hemispheric to conic, shallowly pitted or smooth, epaleate.
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Ray-florets 0 or 7–27, pistillate, fertile;
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corollas (usually marcescent) yellow (laminae fan-shaped to oblanceolate, usually 3-lobed).
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Disc-florets 20–250+, bisexual, fertile;
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corollas yellow proximally, yellow or purplish distally, tubes shorter than cylindric to cylindro-campanulate throats, lobes 5, ± deltate.
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Cypselae ± obpyramidal, moderately to densely hairy;
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pappi persistent, of 4–8 usually aristate, scales.
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mostly oblanceolate
linear or filiform
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in paniculiform to corymbiform or fastigiate arrays
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