Oclemena Greene (Q2275)
Oclemena is a taxon with the rank genus within the tribe Astereae
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Oclemena Greene
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Oclemena is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Oclemena Greene
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Oclemena Greene
Oclemena
Greene
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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long-rhizomatous, white, with swollen apical buds, and/or with branched, woody caudices (O. reticulata), roots fibrous or thick and fleshy (O. reticulata).
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Stems erect, simple, densely villosulous (hairs long, flattened, with ± colored crosswalls), sometimes stipitate-glandular distally.
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sessile or short-petiolate;
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blades (1-nerved, abaxial veins raised, ± reticulate), ovate or obovate-elliptic to elliptic-oblong, obovate to oblanceolate, or linear-lanceolate to linear, proximal reduced to scales, mid largest, gradually reduced to bracts distally, margins entire (then revolute) or serrate (mainly distally), faces sparsely hispid, villosulo-puberulent, or villosulous, sometimes scabrous adaxially, sparsely short-stipitate-glandular (hairs with yellow to orange, resin heads).
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Heads radiate, in ± loose corymbiform arrays or borne singly (nodding in buds).
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Involucres cylindro-campanulate, (5–10 ×) 6–12 mm.
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Phyllaries 25–50 in 3 (–4) series, 1-nerved (slightly keeled) lanceovate (outer) to linear (inner), unequal, membranous, bases not indurate, margins hyaline, chartaceous, erose, with green zones along midveins, lance-linear distally (apices acute), abaxial faces glabrous or sparingly puberulent, sparingly or not stipitate-glandular.
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Receptacles planoconvex, pitted or smooth, epaleate.
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Ray-florets (5–) 7–25, pistillate, fertile;
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corollas white or pink (laminae not coiling).
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Disc-florets (10–) 14–35, bisexual, fertile;
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corollas pale or pinkish yellow, reddening at maturity, abruptly or gradually ampliate, tubes shorter to longer than tubular to narrowly campanulate throats, lobes 5, spreading or reflexed, triangular to lanceolate;
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style-branch appendages narrowly lanceolate.
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Cypselae fusiform or fusiform-obconic (bases stipitate), slightly compressed, 5–8-nerved with 2 thicker lateral nerves, faces ± densely gland-dotted (sessile);
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pappi persistent, of 40–55+ tan, barbellulate, (inner) apically attenuate or ± clavate bristles in (2–) 3 series (outer usually shorter, seldom present in O. nemoralis, inner longer).
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stipitate-glandular
sometimes; distally
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obovate-elliptic
elliptic-oblong obovate
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obovate-elliptic
elliptic-oblong obovate
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obovate-elliptic
elliptic-oblong obovate
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short-stipitate-glandular
sparsely
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stipitate-glandular
sparingly; not
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gland-dotted
more or less densely
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