View source for Poa arachnifera

{{Treatment/ID
|accepted_name=Poa arachnifera
|accepted_authority=Torr.
|publications=
|common_names=Texas bluegrass
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Poa;Poa subg. Poa;Poa sect. Dioicopoa;Poa arachnifera
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Pooideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Poeae]]</div><div class="higher-taxon"><small>genus</small>[[Poa]]</div><div class="higher-taxon"><small>subgenus</small>[[Poa subg. Poa]]</div><div class="higher-taxon"><small>section</small>[[Poa sect. Dioicopoa]]</div><div class="higher-taxon"><small>species</small>[[Poa arachnifera]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; loosely tufted, rhizomatous, rhizomes slender. <b>Basal</b> branching intra- and extravaginal. <b>Culms</b> 20-85 cm, erect, terete or weakly com¬pressed; nodes terete, 0-1 exserted. <b>Sheaths</b> closed firmly for 1/7-1/3 their length, sometimes for a longer distance by a hyaline membrane, terete, smooth, glabrous, bases of basal sheaths glabrous; ligules 1-4 mm, smooth or scabrous; innovation blades 10-35 cm long, 1-3.5 mm wide; cauline blades 2-25 cm long, 1.5-4.5 mm wide, flat or folded, lax, both surfaces smooth or sparsely finely scabrous, glabrous, apices narrowly to broadly prow-shaped. <b>Panicles</b> 3-12(18) cm, erect, narrowly cylindrical, often interrupted or lobed, congested, with (70)100-200 spikelets; nodes with (2)3-7(9) branches; branches 1-3(5) cm, erect to slightly ascending, terete or weakly angled, sparsely to densely coarsely scabrous, with 8-30 spikelets. <b>Spikelets</b> 4-8(10) mm, sexually dimorphic, laterally compressed, pistillate spikelets larger, with fewer florets and more pubescence than the staminate spikelets; florets 2-10; rachilla internodes smooth. <b>Glumes</b> unequal, distinctly keeled, keels and lateral veins scabrous; lower glumes 1-3-veined. <b>Staminate</b> florets: calluses glabrous or sparsely dorsally webbed, hairs plicate, rarely with additional webs under the marginal veins; lemmas 3.5-5 mm, lanceolate, distinctly keeled, keels and marginal veins sparsely short- to long-villous, margins glabrous, apices acute; palea keels scabrous, glabrous or softly puberulent to long-villous at midlength; anthers vestigial (0.1-0.2 mm) or 1.6-2.7 mm. <b>Pistillate</b> florets: calluses copiously 3-webbed, hairs 4-10 mm, mostly silky, plicate; lemmas 4.2-6.4 mm, lanceolate, 5-7 veined, distinctly keeled, glabrous, or the keels and marginal veins, sometimes also the lateral veins, densely long-villous, margins glabrous, apices acute; palea keels scabrous, glabrous or sometimes softly puberulent to long-villous at midlength. <b>2n</b> = 42, ca. 54, 56, ca. 63, 84.</span><!--

-->{{Treatment/Body
|distribution=Kans.;Okla.;Miss.;Tex.;La.;N.C.;Ala.;Tenn.;Ark.;Ill.;Ga.;S.C.;Fla.;N.Mex.
|discussion=<p>Poa arachnifera grows on moist, sandy to rich, black bottomlands of the southern Great Plains. At one time it was cultivated for winter pasture in the southeastern United States. It is strictly dioecious, with a 1:1 ratio of staminate to pistillate plants among herbarium samples. The variable and high chromosome numbers suggest it may be apomictic, but the occurrence of equal numbers of staminate and pistillate individuals in populations seems to suggest that reproduction is primarily sexual. It is the only non-South American species in the section. Its closest relatives appear to be P. bonariensis (Lam.) Kunth and P. lanuginosa Poir.</p>
|tables=
|references=
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-->{{#Taxon:
name=Poa arachnifera
|author=
|authority=Torr.
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Kans.;Okla.;Miss.;Tex.;La.;N.C.;Ala.;Tenn.;Ark.;Ill.;Ga.;S.C.;Fla.;N.Mex.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V24/V24_792.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Poa
|subgenus=Poa subg. Poa
|section=Poa sect. Dioicopoa
|species=Poa arachnifera
}}<!--

-->[[Category:Treatment]][[Category:Poa sect. Dioicopoa]]