Difference between revisions of "Pityopsis Nuttall (Q2279)"
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Latest revision as of 12:51, 24 June 2022
Pityopsis is a taxon with the rank genus within the tribe Astereae
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Pityopsis Nuttall
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Pityopsis is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Pityopsis Nuttall
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Pityopsis Nuttall
Pityopsis
Nuttall
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 ascending to erect, simple or branched, usually moderately to densely appressed silky-sericeous (hairs often anastomosing), rarely glabrate, sometimes stipitate-glandular.
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blades 3–11-parallel-nerved, linear to lanceolate or ovate, often grasslike (basal shorter or longer than mid, mid larger), margins entire, faces glabrate to densely piloso-sericeous (hairs long, thin, soft, sometimes anastomosing).
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Heads radiate, usually in corymbiform to paniculiform arrays, rarely borne singly.
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Involucres turbinate (campanulate upon drying), (4.5–13 ×) 5.5–14 mm.
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Phyllaries 30–50 in 3–5 series, 1-nerved (midnerves sometimes raised; not keeled), lanceolate, unequal, margins scarious, (darker green zones lens-shaped apically) faces glabrate to silky-pilose and/or densely stipitate-glandular.
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Receptacles slightly convex, pitted, epaleate.
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Ray-florets 8–35, pistillate, fertile;
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Disc-florets 15–60, bisexual, fertile;
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corollas yellow, ± ampliate (glabrate, hairs minute and usually only near base of limbs, rarely sparsely to moderately long pilose on much of limbs), tubes shorter than narrowly funnelform throats, lobes 5, erect to spreading, deltate (glabrous or strigose, rarely sparsely long-pilose);
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style-branch appendages deltate (papillate).
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Cypselae (often dark) fusiform, sometimes slightly compressed, sometimes slightly falcate, 8–10-ribbed, faces sparsely to densely strigose;
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pappi persistent, in (3–) 4 series, outer of linear to linear-triangular, barbellate or erose-fimbrillate scales (0.3–1.4 mm, length 5–20% longer inner), inner 2–3 series of 25–50 light tan to light rust, unequal, barbellate, apically attenuate or weakly clavate bristles.
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appressed
usually moderately; moderately to densely
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stipitate-glandular
sometimes
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glabrate
densely piloso-sericeous
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glabrate
silky-pilose and/or densely stipitate-glandular
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compressed
sometimes slightly
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