View source for Dichanthelium oligosanthes

{{Treatment/ID
|accepted_name=Dichanthelium oligosanthes
|accepted_authority=(Schult.) Gould
|publications=
|common_names=Few-flowered panicgrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Panicum oligosanthes
|authority=
|rank=species
}}
|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Paniceae;Dichanthelium;Dichanthelium sect. Oligosantha;Dichanthelium oligosanthes
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Panicoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Paniceae]]</div><div class="higher-taxon"><small>genus</small>[[Dichanthelium]]</div><div class="higher-taxon"><small>section</small>[[Dichanthelium sect. Oligosantha]]</div><div class="higher-taxon"><small>species</small>[[Dichanthelium oligosanthes]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 419
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>cespitose, with caudices. <b>Basal</b> rosettes well-differentiated; blades 2-6 cm, few, ovate to lanceolate. <b>Culms</b> 20-75 cm, geniculate basally, stiffly erect distally; nodes glabrous or sparsely pubescent; internodes often purplish, glabrous, puberulent, or papillose-hirsute; fall phase branching from the midculm nodes, branches initially ascending to erect, sometimes developing simultaneously with and overtopping the primary panicles, later rebranching to form short, bushy clumps of blades and small, included secondary panicles. <b>Cauline</b> leaves 5-7; sheaths not overlapping, glabrous, puberulent, or ascending papillose-hispid, margins ciliate, collars loose, puberulent; ligules 1-3 mm, of hairs; blades 5-12 cm long, 4-15 mm wide, flat or partly involute, glabrous or pubescent abaxially, with 7-9 major veins only slightly more prominent than the minor veins, bases ciliate, rounded to truncate, margins cartilaginous. <b>Primary</b> panicles 5-9 cm long, 3-6 cm wide, partly enclosed to long-exserted, with 6-60 spikelets; branches stiff or wiry, puberulent or scabridulous. <b>Spikelets</b> 2.7-4.2 mm long, 1.7-2.4 mm wide, ellipsoid to broadly obovoid, turgid, glabrous or sparsely pubescent. <b>Lower</b> glumes 1-1.6 mm, acute, similar in texture and vein prominence to the upper glumes; upper glumes strongly veined, often orange to purplish at the base; lower florets sterile; upper florets with minutely umbonate apices. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|distribution=Wash.;Va.;Alta.;B.C.;Man.;Ont.;Sask.;Del.;D.C.;Wis.;W.Va.;Fla.;Wyo.;N.H.;N.J.;N.Mex.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Okla.;N.Y.;Maine;Colo.;Calif.;Ala.;Kans.;N.Dak.;Nebr.;S.Dak.;Ark.;Vt.;Ill.;Ga.;Ind.;Iowa;Ariz.;Idaho;Conn.;Md.;Mass.;Ohio;Utah;Mo.;Minn.;Mich.;R.I.;Mont.;Miss.;Ky.;Oreg.
|discussion=<p><i>Dichanthelium oligosanthes</i> grows throughout the southern portion of the Flora region and extends into northern Mexico. The primary panicles are briefly open-pollinated, then cleistogamous, from late May to early June; the secondary panicles, which are produced from June to November, are cleistogamous. The subspecies intergrade in areas of overlapping range, but they are usually distinct elsewhere.</p><!--
--><p>Specimens of <i>Dichanthelium oligosanthes</i> that have few elongated internodes, but those elongated more than usual, are often mistaken for <i>D. wilcoxianum</i>. Unlike that species, however, they have turgid spikelets with an orange spot at the base of the lemma, indicating that they belong to <i>D. oligosanthes</i>. Such specimens seem to be most common among collections made in the southern and southwestern states during November, February, or March.</p><!--
--><p>Sterile hybrids with <i>Dichanthelium acuminatum</i> have often been called <i>Panicum</i> scoparioid.es Ashe. Apparent hybrids with <i>D. malacophyllum</i>, <i>D. ovale</i>, and <i>D. acuminatum </i>subsp.<i> columbianum</i> are occasionally found.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Spikelets ellipsoid to oblong-obovoid, usually 3.4-4.2 mm long, 1.7-2 mm wide, usually sparsely pubescent; blades usually 4-9 mm wide, more than 10 times longer than wide, often partly imolute; ligules 2-3 mm
|[[Dichanthelium oligosanthes subsp. oligosanthes|Dichanthelium oligosanthes subsp. oligosanthes]]
|-id=key-0-1
|1
|Spikelets broadly obovoid-ellipsoid, 2.7-3.5 mm long, 2-2.4 mm wide, usually glabrous; blades usually 6-15 mm wide, less than 10 times longer than wide, flat; ligules 1-1.5 mm long
|[[Dichanthelium oligosanthes subsp. scribnerianum|Dichanthelium oligosanthes subsp. scribnerianum]]
|}
</div></div><!--

-->{{#Taxon:
name=Dichanthelium oligosanthes
|authority=(Schult.) Gould
|rank=species
|parent rank=section
|synonyms=Panicum oligosanthes
|basionyms=
|family=Poaceae
|illustrator=Linda A. Vorobik;Hana Pazdírková
|illustration copyright=Utah State University
|distribution=Wash.;Va.;Alta.;B.C.;Man.;Ont.;Sask.;Del.;D.C.;Wis.;W.Va.;Fla.;Wyo.;N.H.;N.J.;N.Mex.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Okla.;N.Y.;Maine;Colo.;Calif.;Ala.;Kans.;N.Dak.;Nebr.;S.Dak.;Ark.;Vt.;Ill.;Ga.;Ind.;Iowa;Ariz.;Idaho;Conn.;Md.;Mass.;Ohio;Utah;Mo.;Minn.;Mich.;R.I.;Mont.;Miss.;Ky.;Oreg.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V25/V25_1151.xml
|subfamily=Poaceae subfam. Panicoideae
|tribe=Poaceae tribe Paniceae
|genus=Dichanthelium
|section=Dichanthelium sect. Oligosantha
|species=Dichanthelium oligosanthes
}}<!--

-->[[Category:Treatment]][[Category:Dichanthelium sect. Oligosantha]]