View source for Oclemena acuminata

{{Treatment/ID
|accepted_name=Oclemena acuminata
|accepted_authority=(Michaux) Greene
|publications={{Treatment/Publication
|title=Leafl. Bot. Observ. Crit.
|place=1: 4. 1903
|year=1903
}}
|common_names=Whorled wood aster;aster acuminé
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster acuminatus
|authority=Michaux
|rank=species
|publication_title=Fl. Bor.-Amer.
|publication_place=2: 109. 1803
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster acuminatus var. magdalenensis
|authority=Fernald
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Oclemena;Oclemena acuminata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Oclemena]]</div><div class="higher-taxon"><small>species</small>[[Oclemena acuminata]]</div></div>
|volume=Volume 20
|mention_page=page 81
|treatment_page=page 79
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>(2–)10–80(–100) cm (in extensive, lax clones; rhizomes superficial, elongate, herbaceous or woody, simple). <b>Stems</b> 1, erect, stout (2–4 mm diam.), flexuous, simple, ± densely villosulous, eglandular. <b>Leaves</b> 11–18, sometimes ± crowded distally (often seemingly whorled), proximal often withering by flowering; sessile or winged-subpetiolate; blades obovate to oblanceolate, (20–)60–150(–170) × (2–)10–45(–50) mm, bases cuneate to attenuate, margins flat, serrate distally, teeth sharp, acuminate, ciliate, apices acuminate, faces sparsely villosulous (abaxial mostly along veins and very sparsely stipitate-glandular; array leaves reduced distally). <b>Heads</b> (1–)5–46(–61+) in open corymbiform arrays, branches arching-ascending, at nearly right to ± acute angles with stems. <b>Peduncles</b> thin, 0.9–4.5 cm, densely villosulous, eglandular; bracts 1–2, linear, sparsely villosulous. <b>Involucres</b> 5–10 mm. <b>Phyllaries</b> linear-lanceolate to linear, sparsely villosulous or glabrous, sparsely gland-dotted. <b>Ray</b> florets (9–)15(–18); corollas white, seldom pinkish, 15–20 × 1.4–2 mm. <b>Disc</b> florets 14–30; corollas ampliate, 5.5–7.5 mm, sparsely glandular; tubes shorter than narrowly campanulate, sparsely strigillose throats, lobes reflexed, 0.5–1 mm. <b>Cypselae</b> tan, fusiform-obconic, ± compressed, 2.8–3.6 mm, ribs 3–5 (concolorous with bodies), faces glabrous, gland-dotted; pappi of whitish bristles in 3 series, outer shorter than disc corollas (innermost attenuate). <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–early fall.
|habitat=Cool, mesic to humid forests with usually well-drained, often acidic soils, from red spruce-Fraser fir Appalachian forests (south) to hemlock-white pine-northern hardwoods or Acadian forests, aspen-white birch groves or southern-exposed, open fir forests (north), sometimes clearings and forest edges, ridges
|elevation=0–2000 m
|distribution=N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Conn.;Ga.;Ky.;Maine;Md.;Mass.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Tenn.;Vt.;Va.;W.Va.
|discussion=<p><i>Oclemena acuminata</i> is an Appalachian element. It may be extirpated from Ohio. L. Brouillet and J.-P. Simon (1981) discussed its distribution and ecology. It is adapted to mesic forest environments with relatively low light levels, with mid leaves larger or leaves pseudoverticillate to maximize light capture while minimizing self-shading. Such pseudoverticillate phenotypes have been called A. acuminatus forma subverticillatus Fernald; they are not recognized here (forma acuminatus has regularly dispersed leaves). When growing in exposed habitats, at forest edges, in clearings, or on ridges, <i>O. acuminata</i> is often chlorotic and reduced in size. Hypothesized introgression from <i>O. nemoralis</i> in the southern Appalachians (L. M. Hill 1976), far to the south of the latter’s range, based on morphologic and chemical data, appears unlikely and may represent misinterpretation of such chlorotic individuals. The species has been the object of autecologic studies (Brouillet and Simon 1979, 1980; L. F. Pitelka et al. 1980, 1983, 1985; A. A. Winn and Pitelka 1981; J. W. Ashmun et al. 1985; Pitelka and W. F. Curtis 1986). <i>Aster</i> acuminatus forma discoideus Kuntze, forma subdiscoideus Kuntze, and forma virescens Victorin & J. Rousseau apply to sterile phenotypes in which florets are replaced by bracts; forms are not recognized here.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Oclemena acuminata
|authority=(Michaux) Greene
|rank=species
|parent rank=genus
|synonyms=Aster acuminatus var. magdalenensis
|basionyms=Aster acuminatus
|family=Asteraceae
|phenology=Flowering late summer–early fall.
|habitat=Cool, mesic to humid forests with usually well-drained, often acidic soils, from red spruce-Fraser fir Appalachian forests (south) to hemlock-white pine-northern hardwoods or Acadian forests, aspen-white birch groves or southern-exposed, open fir forests (north), sometimes clearings and forest edges, ridges
|elevation=0–2000 m
|distribution=N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Conn.;Ga.;Ky.;Maine;Md.;Mass.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Tenn.;Vt.;Va.;W.Va.
|reference=None
|publication title=Leafl. Bot. Observ. Crit.
|publication year=1903
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_152.xml
|tribe=Asteraceae tribe Astereae
|genus=Oclemena
|species=Oclemena acuminata
}}<!--

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