View source for Dioscorea polystachya

{{Treatment/ID
|accepted_name=Dioscorea polystachya
|accepted_authority=Turczaninow
|publications={{Treatment/Publication
|title=Bull. Soc. Imp. Naturalistes Moscou
|place=10(7): 158. 1837
|year=1837
}}
|common_names=Cinnamon vine;Chinese yam
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Dioscorea batatas
|authority=Decaisne
}}
|hierarchy=Dioscoreaceae;Dioscorea;Dioscorea polystachya
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dioscoreaceae]]</div><div class="higher-taxon"><small>genus</small>[[Dioscorea]]</div><div class="higher-taxon"><small>species</small>[[Dioscorea polystachya]]</div></div>
|volume=Volume 26
|mention_page=page 478, 480, 481
|treatment_page=page 483
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>tuberous; tubers 1–many, on long stalks and deeply buried, spindle-shaped. <b>Stems</b> twining clockwise, unwinged, terete, climbing to 5 m, producing small bulbils (less than 2 cm diam.) in leaf axils. <b>Leaves</b> alternate proximally, usually opposite distally, occasionally ternate, 3–9 × 3–11 cm; petiole as long as blade, base not clasping; blade 7(–9)-veined, hastate-cordate, glabrous, margins 3-lobed, basal lobes spreading, rounded to ± rhombic, median lobe deltate to ovate, apex acuminate or mucronate; primary veins 7(–9); basal leaves often less distinctly lobed or entire and ovate-cordate. <b>Staminate</b> inflorescences axillary, in fascicle of (1–)3–5 spikes, each spike shorter than 5 cm, or primary inflorescence axis elongate and bearing multiple fascicles; spikes bearing flowers singly, flowers bracteate, distributed along rachis in markedly zigzag pattern, internodes less than 2 mm. <b>Pistillate</b> inflorescences 1 per leaf axil, few-flowered, shorter than 5 cm, internodes between mature flowers greater than 1 cm. <b>Staminate</b> flowers: perianth drying dark, tightly cup-shaped; tepals ovate, ca. 1 mm, margins hyaline, apex acute; fertile stamens 6; filaments connate basally; anthers as long as or longer than filaments, thecae distinct, weakly spreading. <b>Pistillate</b> flowers: perianth as in staminate flowers; staminodes 6 in 2 subequal whorls, anthers and filaments more strongly differentiated in inner whorl, filaments less developed in outer whorl, all smaller than fertile stamens. <b>Capsules</b> not reflexed at maturity, broadly ovate, (1.2–)1.7–2 cm wide. <b>Seeds</b> winged all around. <b>2n</b> = 140.</span><!--

-->{{Treatment/Body
|habitat=Staminate plants flowering summer. Thickets, ravines, stream banks, creek bottoms, limesinks, granite outcrops, alluvial woods, roadsides, drainage canals, waste places, fence rows
|elevation=0–500 m
|distribution=Ala.;Ark.;Conn.;D.C.;Fla.;Ga.;Ky.;Md.;Mass.;Miss.;Mo.;N.J.;N.C.;Ohio;Pa.;S.C.;Tenn.;Va.;W.Va.;e Asia.
|discussion=<p><i>Dioscorea polystachya</i> is native to eastern Asia, where it is cultivated for its edible tubers. In North America, it is planted as a garden ornamental and has become naturalized throughout much of the eastern United States.</p><!--
--><p>Only one pistillate specimen was encountered from the flora area, the plants apparently propagating vegetatively.</p><!--
--><p><i>Dioscorea polystachya</i> is the earliest published name for this species. The name D. oppositifolia Linnaeus, which has been misapplied to this species, actually refers to an ovate-leaved species that is native to the Indian Subcontinent and is not found in the flora area. For a more detailed nomenclatural history of <i>D. polystachya</i>, see Ting C. T. and M. G. Gilbert (2000).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Dioscorea polystachya
|author=
|authority=Turczaninow
|rank=species
|parent rank=genus
|synonyms=Dioscorea batatas
|basionyms=
|family=Dioscoreaceae
|habitat=Staminate plants flowering summer. Thickets, ravines, stream banks, creek bottoms, limesinks, granite outcrops, alluvial woods, roadsides, drainage canals, waste places, fence rows
|elevation=0–500 m
|distribution=Ala.;Ark.;Conn.;D.C.;Fla.;Ga.;Ky.;Md.;Mass.;Miss.;Mo.;N.J.;N.C.;Ohio;Pa.;S.C.;Tenn.;Va.;W.Va.;e Asia.
|introduced=true
|reference=None
|publication title=Bull. Soc. Imp. Naturalistes Moscou
|publication year=1837
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V26/V26_1004.xml
|genus=Dioscorea
|species=Dioscorea polystachya
}}<!--

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