View source for Tripsacum

{{Treatment/ID
|accepted_name=Tripsacum
|accepted_authority=L.
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Andropogoneae;Tripsacum
|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 Andropogoneae]]</div><div class="higher-taxon"><small>genus</small>[[Tripsacum]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 693
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; monoecious, staminate and pistillate spikelets evidently distinct, located in the same inflorescences, pistillate spikelets below the staminate spikelets. <b>Culms</b> 0.7-5 m. <b>Leaves</b> not aromatic; sheaths open; ligules membranous, erose to ciliate. <b>Inflorescences</b> terminal and axillary, panicles of 1-several subdigitate to racemose rames; rames with pistillate spikelets proximally and staminate spikelets distally. <b>Disarticulation</b> in the rames, beneath the pistillate spikelets and at the base of the staminate portions. <b>Pistillate</b> spikelets exposed, solitary, embedded in the indurate rame axes; lower glumes coriaceous, closing the hollows in the rachises and concealing the florets; upper glumes similar but smaller; lower florets sterile; upper florets pistillate; lemmas and paleas hyaline, unawned; styles 2, not fused. <b>Staminate</b> spikelets paired, both sessile or both subsessile, or 1 sessile and the other pedicellate; glumes coriaceous, chartaceous, or membranous; lemmas and paleas hyaline, unawned. <b>Pedicels</b> (when present) not fused to the rame axes, x = 9.</span><!--

-->{{Treatment/Body
|distribution=Conn.;N.J.;N.Y.;Del.;D.C;W.Va.;Fla.;Puerto Rico;N.Mex.;Mass.;R.I.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Md.;Ala.;Ark.;Ill.;Ga.;Ind.;Iowa;Ariz.;Kans.;Nebr.;Okla.;Tex.;Ohio;Mo.;Mich.;Miss.;Ky.
|discussion=<p><i>Tripsacum</i> is a genus of 12 species, all of which are native to tropical and subtropical regions of the Western Hemisphere; three are native to the Flora region. They are good forage grasses, but are rarely sufficiently abundant in the Flora region to be important in this regard. The genus is of interest to plant breeders because of its relationship to <i>Zea</i>. Measurements of the pistillate spikelets are based on measurements of the lower glumes of the sessile spikelets, the remainder of the spikelet being concealed between the rachis and the lower glume.</p>
|tables=
|references={{Treatment/Reference
|id=de1982a
|text=de Wet, J.M.J., J.R. Harlan, and D.E. Brink. 1982. Systematics of Tripsacum dactyloides. Amer. J. Bot. 69:1251-1257
}}{{Treatment/Reference
|id=de1983a
|text=de Wet, J.M.J., D.E. Brink, and C.E. Cohen. 1983. Systematics of Tripsacum section Fasciculata (Gramineae). Amer. J. Bot. 70:1139-1146
}}{{Treatment/Reference
|id=gray1974a
|text=Gray, J.R. 1974. The genus Tripsacum L. (Gramineae): Taxonomy and chemosystematics. Ph.D. dissertation, University of Illinois at Urbana-Champaign, Urbana, Illinois, U.S.A. 191 pp.
}}{{Treatment/Reference
|id=li2000a
|text=Li, Y.G., C.L. Dewald, and V.A. Sokolov. 2000. Sectional delineation of sexual Tripsacum dactyloides-T. mai.ar allotriploids. Ann. Bot. (London), n.s., 85:845-850.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Staminate spikelets in sessile-pedicellate pairs, the pedicels almost flat to plano-convex in cross section, 2-5 mm long, less than 0.3 mm wide; glumes usually membranous (sect. Fasciculata)
|[[Tripsacum lanceolatum|Tripsacum lanceolatum]]
|-id=key-0-1
|1
|Staminate spikelets sessile, subsessile, or in sessile-pedicellate pairs, the pedicels triangular in cross section, to 2 mm long and about 0.5-0.8 mm wide; glumes somewhat coriaceous (sect. Tripsacum).
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Blades 9-35(45) mm wide, flat; culms 1-2(4) m tall
|[[Tripsacum dactyloides|Tripsacum dactyloides]]
|-id=key-0-2
|2
|Blades 1-7(15) mm wide, involute or folded; culms to 1 m tall
|[[Tripsacum floridanum|Tripsacum floridanum]]
|}
</div></div><!--

-->{{#Taxon:
name=Tripsacum
|author=Mary E. Barkworth;
|authority=L.
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Conn.;N.J.;N.Y.;Del.;D.C;W.Va.;Fla.;Puerto Rico;N.Mex.;Mass.;R.I.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Md.;Ala.;Ark.;Ill.;Ga.;Ind.;Iowa;Ariz.;Kans.;Nebr.;Okla.;Tex.;Ohio;Mo.;Mich.;Miss.;Ky.
|reference=de1982a;de1983a;gray1974a;li2000a
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V25/V25_1654.xml
|subfamily=Poaceae subfam. Panicoideae
|tribe=Poaceae tribe Andropogoneae
|genus=Tripsacum
}}<!--

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