View source for Lasiacis ← Lasiacis 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=Lasiacis |accepted_authority=(Griseb.) Hitchc. |publications= |basionyms= |synonyms= |hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Paniceae;Lasiacis |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 Paniceae]]</div><div class="higher-taxon"><small>genus</small>[[Lasiacis]]</div></div> |volume=Volume 25 |mention_page= |treatment_page=page 387 }}<!-- --><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>perennial (rarely annual);</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism growth form;whole_organism growth form">cespitose.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement;culm texture;culm orientation;culm orientation;culm growth form;culm growth form;culm growth form;culm growth form;culm architecture"><b>Culms </b>0.5-8 m, weakly lignified, erect, arching, climbing, or decumbent, rooting at the nodes.</span> <span class="statement" id="st-d0_s3" data-properties="sheath architecture"><b>Sheaths </b>open;</span> <span class="statement" id="st-d0_s4" data-properties="ligule texture;ligule architecture or pubescence or shape">ligules membranous, sometimes ciliate;</span> <span class="statement" id="st-d0_s5" data-properties="pseudopetiole presence">pseudopetioles sometimes present;</span> <span class="statement" id="st-d0_s6" data-properties="blade shape;base architecture or shape">blades linear to ovate, bases slightly to strongly asymmetric.</span> <span class="statement" id="st-d0_s7" data-properties="inflorescence architecture;panicle condition or size;rachis prominence"><b>Inflorescences </b>open or contracted panicles, rachises usually visible, even distally, spikelets attached obliquely to the pedicels;</span> <span class="statement" id="st-d0_s8" data-properties="spikelet fixation">disarticulation below the glumes.</span> <span class="statement" id="st-d0_s9" data-properties="spikelet shape;floret quantity"><b>Spikelets </b>subglobose to globose, with 2 florets.</span> <span class="statement" id="st-d0_s10" data-properties="glume texture;apex pubescence;apex pubescence;apex architecture or shape"><b>Glumes </b>membranous, apices lanate pubescent, abruptly apiculate;</span> <span class="statement" id="st-d0_s11" data-properties="lower glume quantity;lower glume architecture;base architecture or shape;margin arrangement">lower glumes 1/3 – 2/3 as long as the spikelets, 5-13-veined, bases saccate, margins overlapping;</span> <span class="statement" id="st-d0_s12" data-properties="upper glume architecture or shape;upper glume architecture">upper glumes about as long as the upper florets, not saccate, 7-15-veined;</span> <span class="statement" id="st-d0_s13" data-properties="lower floret reproduction;lower floret architecture">lower florets sterile or staminate;</span> <span class="statement" id="st-d0_s14" data-properties="lower lemma texture;apex pubescence;apex pubescence;apex architecture or shape">lower lemmas membranous, apices lanate pubescent, abruptly apiculate;</span> <span class="statement" id="st-d0_s15" data-properties="lower palea presence;lower palea size">lower paleas present, sometimes reduced;</span> <span class="statement" id="st-d0_s16" data-properties="upper floret architecture;upper floret reproduction;upper floret shape;upper floret shape">upper florets stipitate, bisexual, appearing to mucronate or acuminate;</span> <span class="statement" id="st-d0_s17" data-properties="upper lemma texture;upper lemma shape;apex shape;apex pubescence;apex coloration">upper lemmas indurate, usually broadly elliptic to obovate, margins enclosing the edges of the paleas, apices obtuse, somewhat woolly-pubescent, usually dark-brown at maturity;</span> <span class="statement" id="st-d0_s18" data-properties="upper palea architecture or shape;upper palea shape">upper paleas similar to the lemmas, but saccate below and gibbous above.</span> <span class="statement" id="st-d0_s19" data-properties="caryopsis shape;caryopsis shape;caryopsis shape;caryopsis shape;caryopsis shape"><b>Caryopses </b>planoconvex, ovoid, or nearly orbicular;</span> <span class="statement" id="st-d0_s20" data-properties="">embryo about M as long as the caryopses;</span> <span class="statement" id="st-d0_s21" data-properties="hilum shape;x chromosome quantity">hila oblong to nearly round, x = 9.</span><!-- -->{{Treatment/Body |distribution=Puerto Rico;Virgin Islands;Fla. |discussion=<p>In Lasiacis the upper florets appear to be mucronate or acuminate. The mucro or acuminate apex is formed by the tuft of hairs at the apex of the upper floret.</p><!-- --><p>Lasiacis is a neotropical genus of 16 species that extends from southern Florida to Peru and Argentina. Two species are native to the Flora region. The shiny black color of its mature florets and the oil-filled cells of the inner epidermes of the glumes and sterile lemmas distinguish Lasiacis from all other grasses. Birds are a common dispersal agent.</p> |tables= |references={{Treatment/Reference |id=davidse1973a |text=Davidse, G. and E. Morton. 1973. Bird-mediated fruit dispersal in the tropical grass genus Lasiacis (Gramineae: Paniceae). Biotropica 5:162-167. }}{{Treatment/Reference |id=davidse1978a |text=Davidse, G. 1978. A systematic study of the genus Lasiacis (Gramineae: Paniceae). Ann. Missouri Bot. Gard. 65:1133-1254 }} }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Leaf blades linear-lanceolate to narrowly lanceolate, 3-16 cm long, 3-30 mm wide |[[Lasiacis divaricata|Lasiacis divaricata]] |-id=key-0-1 |1 |Leaf blades ovate to broadly lanceolate, 2-16 cm long, 8-56 mm wide |[[Lasiacis ruscifolia|Lasiacis ruscifolia]] |} </div></div><!-- -->{{#Taxon: name=Lasiacis |author=Gerrit Davidse; |authority=(Griseb.) Hitchc. |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Poaceae |distribution=Puerto Rico;Virgin Islands;Fla. |reference=davidse1973a;davidse1978a |publication title= |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25_1100.xml |subfamily=Poaceae subfam. Panicoideae |tribe=Poaceae tribe Paniceae |genus=Lasiacis |apex architecture or shape=apiculate;apiculate |apex coloration=dark-brown |apex pubescence=woolly-pubescent;pubescent;lanate;pubescent;lanate |apex shape=obtuse |base architecture or shape=saccate;asymmetric |blade shape=linear;ovate |caryopsis shape=orbicular;ovoid;orbicular;ovoid;planoconvex |culm architecture=rooting |culm growth form=decumbent;climbing;decumbent;climbing |culm orientation=arching;erect |culm some measurement=0.5m;8m |culm texture=lignified |floret quantity=2 |glume texture=membranous |hilum shape=oblong;nearly round |inflorescence architecture=open |ligule architecture or pubescence or shape=ciliate |ligule texture=membranous |lower floret architecture=staminate |lower floret reproduction=sterile |lower glume architecture=5-13-veined |lower glume quantity=1/3;2/3 |lower lemma texture=membranous |lower palea presence=absent |lower palea size=reduced |margin arrangement=overlapping |panicle condition or size=contracted |pseudopetiole presence=absent |rachis prominence=visible |sheath architecture=open |spikelet fixation=attached |spikelet shape=subglobose;globose |upper floret architecture=stipitate |upper floret reproduction=bisexual |upper floret shape=acuminate;mucronate |upper glume architecture=7-15-veined |upper glume architecture or shape=not saccate |upper lemma shape=usually broadly elliptic;obovate |upper lemma texture=indurate |upper palea architecture or shape=saccate |upper palea shape=gibbous |whole_organism duration=perennial |whole_organism growth form=plant;cespitose |x chromosome quantity=9 }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Paniceae]] 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) Template:Treatment/Reference (view source) Return to Lasiacis.