View source for Chasmanthium

{{Treatment/ID
|accepted_name=Chasmanthium
|accepted_authority=Link
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Centothecoideae;Poaceae tribe Centotheceae;Chasmanthium
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Centothecoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Centotheceae]]</div><div class="higher-taxon"><small>genus</small>[[Chasmanthium]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 344
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; cespitose or loosely colonial, rhizomatous. <b>Culms</b> 35-150 cm, simple or branched. <b>Leaves</b> cauline; ligules membranous, ciliate; blades not pseudopetiolate, flat. <b>Panicles</b> open or contracted, sometimes becoming racemose distally; disarticulation above the glumes and between the florets. <b>Spikelets</b> 4-50 mm, laterally compressed, with 2-many florets, lower 1-4 florets sterile. <b>Glumes</b> 2, subequal, shorter than the spikelets, glabrous, (2)3-9-veined, acute to acuminate; lemmas glabrous, 3-15-veined, compressed-keeled, keels serrate or ciliate, apices acuminate to acute, entire (rarely bifid); paleas glabrous, gibbous basally, 2-keeled, keels winged, wings glabrous, scabrous, or pilose; lodicules 2, fleshy, cuneate, 2-4-veined, lobed-truncate; anthers 1; ovaries glabrous; styles 2; style branches 2, plumose, reddish-purple at anthesis. <b>Caryopses</b> 1.9-5 mm, laterally compressed, brown to reddish-black or black, x = 12.</span><!--

-->{{Treatment/Body
|distribution=Del.;Wis.;W.Va.;Fla.;N.J.;Tex.;La.;N.C.;Tenn.;S.C.;Pa.;N.Y.;D.C;N.Mex.;Va.;Ala.;Ark.;Ill.;Ga.;Ind.;Iowa;Ariz.;Md.;Kans.;Okla.;Ohio;Mo.;Mich.;Miss.;Ky.
|discussion=<p><i>Chasmanthium</i>, a genus of five species endemic to North America, grows primarily in the southeastern and south-central parts of the United States. It was formerly included in <i>Uniola</i>, but it is now recognized as a distinct genus.</p>
|tables=
|references={{Treatment/Reference
|id=yates1966b
|text=Yates, H.O. 1966a. Morphology and cytology of Uniola (Gramineae). SouthW. Naturalist 11:145-189
}}{{Treatment/Reference
|id=yates1966c
|text=Yates, H.O. 1966b. Revision of grasses traditionally referred to Uniola, II. Chasmanthium. SouthW. Naturalist 11:451-455.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Panicle branches nodding or drooping; pedicels 10-30 mm long; calluses pilose; lower glumes 4.2-9.1 mm long; keels of fertile lemmas winged, the wings scabrous to pilose their full length; caryopses 2.9-5 mm long
|[[Chasmanthium latifolium|Chasmanthium latifolium]]
|-id=key-0-1
|1
|Panicle branches erect or ascending; pedicels 0.5-2.5(5) mm long; calluses glabrous; lower glumes 1.2-5 mm long; keels of fertile lemmas not winged, scabridulous toward or at the apices; caryopses 1.9-3 mm long.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Spikelets 9.5-24 mm long; fertile lemmas 9-13-veined; caryopses enclosed at maturity; blades 7-16(33) cm long, lanceolate-fusiform; culms leafy for 80% of their height.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Axils of the panicle branches scabrous; fertile florets diverging to 45° from the rachilla; sterile florets (0)1(2); lower glumes 3.1-5 mm long, 7-9-veined; ligules entire
|[[Chasmanthium nitidum|Chasmanthium nitidum]]
|-id=key-0-3
|3
|Axils of the panicle branches pilose; fertile florets diverging to 85° from the rachilla; sterile florets 2-4; lower glumes 2.5-2.9 mm long, 2-3-veined; ligules irregularly laciniate
|[[Chasmanthium ornithorhynchum|Chasmanthium ornithorhynchum]]
|-id=key-0-2
|2
|Spikelets 4-10 mm long; fertile lemmas 3-9-veined; caryopses exposed at maturity; blades (8)20-50 cm long, linear-lanceolate; culms leafy for 40-50% of their height.
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Collars and sheaths pilose; culms (1)2-3.5 mm thick at the nodes; fertile lemmas 7-9-veined, usually curved or irregularly contorted
|[[Chasmanthium sessiliflorum|Chasmanthium sessiliflorum]]
|-id=key-0-4
|4
|Collars and sheaths glabrous; culms to 1 mm thick at the nodes; fertile lemmas 3-7-veined, straight
|[[Chasmanthium laxum|Chasmanthium laxum]]
|}
</div></div><!--

-->{{#Taxon:
name=Chasmanthium
|author=J. Gabriel Sanchez-Ken;Lynn G. Clark;
|authority=Link
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Del.;Wis.;W.Va.;Fla.;N.J.;Tex.;La.;N.C.;Tenn.;S.C.;Pa.;N.Y.;D.C;N.Mex.;Va.;Ala.;Ark.;Ill.;Ga.;Ind.;Iowa;Ariz.;Md.;Kans.;Okla.;Ohio;Mo.;Mich.;Miss.;Ky.
|reference=yates1966b;yates1966c
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V25/V25_1034.xml
|subfamily=Poaceae subfam. Centothecoideae
|tribe=Poaceae tribe Centotheceae
|genus=Chasmanthium
}}<!--

-->[[Category:Treatment]][[Category:Poaceae tribe Centotheceae]]