View source for Ischaemum ← Ischaemum You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{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-d0_s0" data-properties="whole_organism duration;whole_organism duration;whole_organism growth form"><b>Plants </b>annual or perennial.</span> <span class="statement" id="st-d0_s1" data-properties="culm some measurement;culm growth form or orientation;culm architecture"><b>Culms </b>10-350 cm, often decumbent, sometimes branched above the base.</span> <span class="statement" id="st-d0_s2" data-properties="leaf odor"><b>Leaves </b>not aromatic;</span> <span class="statement" id="st-d0_s3" data-properties="sheath architecture">sheaths open;</span> <span class="statement" id="st-d0_s4" data-properties="ligule texture;ligule pubescence;ligule pubescence;side position">ligules membranous, glabrous or ciliate, sides often higher than the middle.</span> <span class="statement" id="st-d0_s5" data-properties="inflorescence position or structure subtype;inflorescence position"><b>Inflorescences </b>terminal, sometimes also axillary;</span> <span class="statement" id="st-d0_s6" data-properties="rame quantity;peduncle quantity">inflorescence units with (1) 2-many rames on a common peduncle;</span> <span class="statement" id="st-d0_s7" data-properties="inflorescence unit fixation or orientation;member architecture;member orientation">rames secund, ascending, members of a cluster sometimes so closely appressed as to appear as one;</span> <span class="statement" id="st-d0_s8" data-properties="internode shape">internodes stoutly linear to clavate.</span> <span class="statement" id="st-d0_s9" data-properties=""><b>Spikelets </b>in homogamous or heterogamous sessile-pedicellate or unequally pedicellate pairs;</span> <span class="statement" id="st-d0_s10" data-properties="spikelet reproduction;spikelet reproduction;spikelet reproduction;spikelet reproduction;spikelet reproduction;spikelet reproduction;spikelet architecture;spikelet architecture">disarticulation in the rames, below both the sessile and pedicellate spikelets.</span> <span class="statement" id="st-d0_s11" data-properties="spikelet architecture;spikelet shape"><b>Sessile </b>spikelets dorsally compressed;</span> <span class="statement" id="st-d0_s12" data-properties="glume size">glumes subequal;</span> <span class="statement" id="st-d0_s13" data-properties="lower glume shape;keel architecture">lower glumes 2-keeled, keels sometimes winged;</span> <span class="statement" id="st-d0_s14" data-properties="upper glume shape;upper glume architecture or shape">upper glumes keeled, sometimes awned;</span> <span class="statement" id="st-d0_s15" data-properties="lower floret architecture">lower florets staminate;</span> <span class="statement" id="st-d0_s16" data-properties="upper floret reproduction;lemma architecture or shape;lemma architecture or shape">upper florets bisexual, lemmas usually bifid and awned from the sinus.</span> <span class="statement" id="st-d0_s17" data-properties="pedicel fusion;pedicel shape;pedicel shape"><b>Pedicels </b>fused to the rame axes, clavate or inflated, sometimes as wide as the spikelets.</span> <span class="statement" id="st-d0_s18" data-properties="spikelet architecture;spikelet architecture;spikelet size;spikelet architecture;x chromosome quantity;x chromosome quantity"><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>Ischaemum 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-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25_1565.xml |subfamily=Poaceae subfam. Panicoideae |tribe=Poaceae tribe Andropogoneae |genus=Ischaemum |culm architecture=branched |culm growth form or orientation=decumbent |culm some measurement=10cm;350cm |glume size=subequal |inflorescence position=axillary |inflorescence position or structure subtype=terminal |inflorescence unit fixation or orientation=appressed |internode shape=stoutly linear;clavate |keel architecture=winged |leaf odor=not aromatic |lemma architecture or shape=awned;bifid |ligule pubescence=ciliate;glabrous |ligule texture=membranous |lower floret architecture=staminate |lower glume shape=2-keeled |member architecture=secund |member orientation=ascending |pedicel fusion=fused |pedicel shape=inflated;clavate |peduncle quantity=common |rame quantity=(1)2;many |sheath architecture=open |side position=often higher |spikelet architecture=sessile;staminate;pedicellate;sessile;pedicellate;sessile |spikelet reproduction=punct;pairs;pedicellate;sessile-pedicellate;heterogamous;homogamous |spikelet shape=compressed |spikelet size=reduced |upper floret reproduction=bisexual |upper glume architecture or shape=awned |upper glume shape=keeled |whole_organism duration=perennial;annual |whole_organism growth form=plant |x chromosome quantity=10;9 }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Andropogoneae]] Templates used on this page: Template:Poaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Return to Ischaemum.