View source for Aristida dichotoma

{{Treatment/ID
|accepted_name=Aristida dichotoma
|accepted_authority=Michx.
|publications=
|common_names=Churchmouse threeawn
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Aristidoideae;Poaceae tribe Aristideae;Aristida;Aristida dichotoma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Aristidoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Aristideae]]</div><div class="higher-taxon"><small>genus</small>[[Aristida]]</div><div class="higher-taxon"><small>species</small>[[Aristida dichotoma]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 328
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual. <b>Culms</b> 15-60 cm, erect or geniculate at the base, branching at most of the nodes. <b>Leaves</b> cauline; sheaths usually shorter than the internodes, glabrous or sparsely pilose; collars glabrous; ligules less than 0.5 mm; blades 3-10 cm long, 1-2 mm wide, flat to folded basally, involute distally, scabridulous on both surfaces, occasionally sparsely pilose adaxially, light green. <b>Inflorescences</b> paniculate or racemose, 2-11 cm long, to 1 cm wide; nodes glabrous or strigillose; primary branches 1-2 cm, appressed, without axillary pulvini, with 1-2 spikelets. <b>Spikelets</b> partly overlapping, often in pairs, 1 spikelet subsessile, the other pedicellate. <b>Glumes</b> 1-veined, light gray to dark purplish or brownish; lower glumes 3-8(10) mm, from 1/2 as long as the upper glumes to nearly equaling them; upper glumes 4-13 mm; calluses 0.3-0.5 mm; lemmas 3-11 mm, light gray to purplish, frequently mottled, midveins scabrous, elsewhere glabrous, scabridulous, or sparsely appressed-puberulent, junction with the awns not evident; central awns 3-8 mm, coiled at the base, spreading distally; lateral awns 1-4 mm, straight, erect; anthers 3 and 2-3 mm, or 1 and about 0.25 mm. <b>Caryopses</b> light brown. <b>2n</b> = unknown.</span><!--

-->{{Treatment/Body
|distribution=Conn.;N.J.;N.Y.;Ill.;Maine;Mich.;Wis.;W.Va.;Del.;D.C;Ohio;Ark.;Kans.;Nebr.;Okla.;S.Dak.;Mass.;N.H.;R.I.;Vt.;Fla.;Wyo.;Tex.;La.;Ind.;Miss.;Tenn.;N.C.;S.C.;Pa.;Va.;Colo.;Ont.;Calif.;Ala.;Ga.;Iowa;Md.;Mo.;Minn.;Ky.
|discussion=<p><i>Aristida dichotoma</i> grows in sandy fields and clearings, disturbed sites and sterile ground, pine woods, and on granitic outcrops of the United States and southern Ontario. The two varieties have similar ecological preferences and extensive overlap in their ranges, but <i></i>var.<i> curtissii</i> is somewhat more western in its distribution.</p><!--
--><p><i>Aristida dichotoma</i> is similar to <i>A. basiramea</i>, differing in its shorter lateral awns. Further study may show that the two should be treated as conspecific varieties.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Glumes unequal; lemmas smooth or scabridulous, 6-11 mm long
|[[Aristida dichotoma var. curtissii|Aristida dichotoma var. curtissii]]
|-id=key-0-1
|1
|Glumes equal or subequal; lemmas sparsely appressed-pubescent, 3-8 mm long
|[[Aristida dichotoma var. dichotoma|Aristida dichotoma var. dichotoma]]
|}
</div></div><!--

-->{{#Taxon:
name=Aristida dichotoma
|authority=Michx.
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Poaceae
|illustrator=Linda A. Vorobik;Andy Sudkamp
|illustration copyright=Utah State University
|distribution=Conn.;N.J.;N.Y.;Ill.;Maine;Mich.;Wis.;W.Va.;Del.;D.C;Ohio;Ark.;Kans.;Nebr.;Okla.;S.Dak.;Mass.;N.H.;R.I.;Vt.;Fla.;Wyo.;Tex.;La.;Ind.;Miss.;Tenn.;N.C.;S.C.;Pa.;Va.;Colo.;Ont.;Calif.;Ala.;Ga.;Iowa;Md.;Mo.;Minn.;Ky.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V25/V25_1002.xml
|subfamily=Poaceae subfam. Aristidoideae
|tribe=Poaceae tribe Aristideae
|genus=Aristida
|species=Aristida dichotoma
}}<!--

-->[[Category:Treatment]][[Category:Aristida]]