View source for Eurybia hemispherica

{{Treatment/ID
|accepted_name=Eurybia hemispherica
|accepted_authority=(Alexander) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 260. 1995
|year=1995
}}
|common_names=Single-stemmed bog or Southern prairie aster
|basionyms={{Treatment/ID/Synonym
|name=Aster hemisphericus
|authority=Alexander
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster gattingeri
|authority=Alexander
}} {{Treatment/ID/Synonym
|name=Aster paludosus subsp. hemisphericus
|authority=(Alexander) Cronquist
}} {{Treatment/ID/Synonym
|name=Aster paludosus var. hemisphericus
|authority=(Alexander) Waterfall
}} {{Treatment/ID/Synonym
|name=Aster pedionomus
|authority=Alexander
}} {{Treatment/ID/Synonym
|name=Aster verutifolius
|authority=(Alexander) Shinners
}} {{Treatment/ID/Synonym
|name=Heleastrum hemisphaericum
|authority=unknown
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Eurybia;Eurybia hemispherica
|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>[[Eurybia]]</div><div class="higher-taxon"><small>species</small>[[Eurybia hemispherica]]</div></div>
|volume=Volume 20
|mention_page=page 367, 380, 381
|treatment_page=page 379
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>20–100 cm; in clones of scattered clumps, eglandular; rhizomes creeping, tangled, scaly, often becoming thickly woody, or thick, woody caudices. <b>Stems</b> 1–4, erect or ascending, often reddish, simple, straight to stict, proximally glabrous, distally ± sparsely strigillose (at least arrays). <b>Leaves</b> basal and cauline, blades with adaxial midvnerves raised (grooved abaxially), sometimes with 1–2 ± parallel pairs of more obscure secondary nerves (veins obscure), lance-ovate or linear-lanceolate to linear, coriaceous, margins usually entire, sometimes remotely spinulose-toothed, often revolute apically, indurate, scabrous, apices acute, acuminate or obtuse, indurate, abaxial faces glabrous or glabrate, adaxial sparsely scabridulous (hairs minuscule, basal “bulb” bearing terminal seta); basal withering by flowering, petioles marcescent, ± winged; proximal petiole bases sheathing, blades 50–175 × 3–12 mm, bases attenuate or cuneate; cauline progressively sessile and reduced distally, 25–125(–150) × 1.5–8 mm, bases clasping to subclasping. <b>Heads</b> 1–35+ in elongate, usually racemiform to spiciform, sometimes ± flat-topped, corymbiform arrays, branches robust, ascending. <b>Peduncles</b> 2–80 mm or subsessile; bracts 0–4, linear-lanceolate, 10–35 × 0.5–2 mm, mucronulate, grading into phyllaries. <b>Involucres</b> hemispheric, 8–12(–15) mm, shorter than pappi. <b>Phyllaries</b> 48–64 in 4–6 series, oblong-lanceolate or lanceolate (outer) to oblong or lanceolate-linear (inner), unequal, coriaceous (outer) to membranous (inner), bases indurate, rounded (outer), green zones slightly expanded, in 1/2–4/5 distal portions (outer), margins indurate, scabrous or scabroso-ciliate, edges and apices purplish in inner, apices ascending or squarrose to strongly reflexed, acute to acuminate, mucronulate, faces glabrous. <b>Ray</b> florets 15–30; corollas usually violet-purple, seldom white, (10–)13–15(–20) × 1.3–3 mm. <b>Disc</b> florets (40–)52–80+; corollas light yellow turning brown, 5.8–6.6 mm, ± ampliate, tubes (1.7–2.2 mm) shorter than narrowly campanulate throats (3.4–4 mm), lobes erect, lanceolate and cuspidate or acuminate, 0.7–1.2 mm. <b>Cypselae</b> brown, cylindro-obovoid to fusiform, slightly flattened, 2.6–3.7 mm, ribs 9–16 (stramineous to olive, crowded), faces ± densely strigillose; pappi of tawny to cinnamom (coarse, rigid, sometimes apically clavellate) bristles 6–7.5 mm, equaling disc corollas. <b>2n</b> = 18, 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Dry to mesic, less commonly in moist, sandy-loamy soils, open habitats, open oak-pine or oak-hickory woods, bottomlands, prairies, pastures, roadsides
|elevation=0–800 m
|distribution=Ala.;Ark.;Fla.;Ga.;Kans.;Ky.;La.;Miss.;Mo.;Okla.;Tenn.;Tex.
|discussion=<p><i>Eurybia hemispherica</i> is of conservation concern in Florida, Georgia, and Kentucky. A. Cronquist (1980) stated that this species and <i>E. paludosa</i> are difficult to separate but geographically distinct (see under 21. <i>E. paludosa</i>). The two species are often treated as infraspecific taxa of <i>E. paludosa</i>. <i>Eurybia hemispherica</i> is diploid and tetraploid, while <i>E. paludosa</i> has been reported only as a tetraploid. There is great morphologic variation in <i>E. hemispherica</i>, from slender individuals, reminiscent of <i>E. paludosa</i>, to very robust, distinctive plants. Arrays in <i>E. hemispherica</i> are usually racemiform; well-developed ones may be distally corymbiform and resemble the arrays of <i>E. paludosa</i>, although the proximal part remains somewhat racemiform (i.e., proximal heads borne on short, simple branches, or tufts of leaves are present). Phyllaries in <i>E. hemispherica</i> may be superficially similar to those of <i>E. paludosa</i>, but often the outer phyllaries are similar to peduncular bracts (and in fact may have been recruited from such), being more triangular, coriaceous, and parallel-veined, a feature never encoutered in <i>E. paludosa</i>; such phyllaries strongly resemble those of <i>E. eryngiifolia</i>. Other characters may help distinguish the two species. <i>Eurybia paludosa</i> usually has thin peduncles, hirtello-puberulent to villoso-hirsute peduncles and phyllaries, and ciliate phyllary margins along the indurate bases. In <i>E. hemispherica</i>, the pedicels are thin to usually robust, when present, the phyllaries are glabrous to sparsely strigillose, and the phyllary margins along the indurate bases are scabrous or scabroso-ciliate, not long-ciliate.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eurybia hemispherica
|author=
|authority=(Alexander) G. L. Nesom
|rank=species
|parent rank=genus
|synonyms=Aster gattingeri;Aster paludosus subsp. hemisphericus;Aster paludosus var. hemisphericus;Aster pedionomus;Aster verutifolius;Heleastrum hemisphaericum
|basionyms=Aster hemisphericus
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Dry to mesic, less commonly in moist, sandy-loamy soils, open habitats, open oak-pine or oak-hickory woods, bottomlands, prairies, pastures, roadsides
|elevation=0–800 m
|distribution=Ala.;Ark.;Fla.;Ga.;Kans.;Ky.;La.;Miss.;Mo.;Okla.;Tenn.;Tex.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_867.xml
|tribe=Asteraceae tribe Astereae
|genus=Eurybia
|species=Eurybia hemispherica
}}<!--

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