View source for Ischaemum

{{Treatment/ID
|accepted_name=Ischaemum
|accepted_authority=L.
|publications=
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Andropogoneae;Ischaemum
|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>[[Ischaemum]]</div></div>
|volume=Volume 25
|mention_page=
|treatment_page=page 648
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual or perennial. <b>Culms</b> 10-350 cm, often decumbent, sometimes branched above the base. <b>Leaves</b> not aromatic; sheaths open; ligules membranous, glabrous or ciliate, sides often higher than the middle. <b>Inflorescences</b> terminal, sometimes also axillary; inflorescence units with (1)2-many rames on a common peduncle; rames secund, ascending, members of a cluster sometimes so closely appressed as to appear as one; internodes stoutly linear to clavate. <b>Spikelets</b> in homogamous or heterogamous sessile-pedicellate or unequally pedicellate pairs; disarticulation in the rames, below both the sessile and pedicellate spikelets. <b>Sessile</b> spikelets dorsally compressed; glumes subequal; lower glumes 2-keeled, keels sometimes winged; upper glumes keeled, sometimes awned; lower florets staminate; upper florets bisexual, lemmas usually bifid and awned from the sinus. <b>Pedicels</b> fused to the rame axes, clavate or inflated, sometimes as wide as the spikelets. <b>Pedicellate</b> spikelets morphologically and sexually similar to the sessile spikelets or staminate and reduced, x = 9, 10.</span><!--

-->{{Treatment/Body
|distribution=Md.;Pacific Islands (Hawaii)
|discussion=<p><i>Ischaemum</i> includes approximately 65 species, all of which are native to tropical regions of the Eastern Hemisphere. None of the species is known to be established in North America. The genus is included in this treatment because two of its species are considered serious weed threats by the U.S. Department of Agriculture.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Lower glumes of the sessile spikelets not winged, rugose, with 4-5 ridges; plants annuals or short-lived perennials
|[[Ischaemum rugosum|Ischaemum rugosum]]
|-id=key-0-1
|1
|Lower glumes of the sessile spikelets winged on the keels, not rugose; plants perennial
|[[Ischaemum indicum|Ischaemum indicum]]
|}
</div></div><!--

-->{{#Taxon:
name=Ischaemum
|author=Mary E. Barkworth;
|authority=L.
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Poaceae
|distribution=Md.;Pacific Islands (Hawaii)
|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_1565.xml
|subfamily=Poaceae subfam. Panicoideae
|tribe=Poaceae tribe Andropogoneae
|genus=Ischaemum
}}<!--

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