View source for Aira ← Aira 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=Aira |accepted_authority=L |publications= |basionyms= |synonyms= |hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Aira |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>[[Aira]]</div></div> |volume=Volume 24 |mention_page= |treatment_page=page 615 }}<!-- --><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>annual;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism arrangement or pubescence;whole_organism growth form">tufted.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement;culm orientation"><b>Culms </b>1-55 cm, erect to decumbent.</span> <span class="statement" id="st-d0_s3" data-properties="leaf position"><b>Leaves </b>cauline;</span> <span class="statement" id="st-d0_s4" data-properties="sheath length;sheath relief;sheath architecture or pubescence or relief">sheaths open for most of their length, glabrous, usually scabridulous, occasionally smooth;</span> <span class="statement" id="st-d0_s5" data-properties="auricle presence">auricles absent;</span> <span class="statement" id="st-d0_s6" data-properties="ligule texture">ligules membranous;</span> <span class="statement" id="st-d0_s7" data-properties="leaf blade size">blades of the uppermost leaves greatly reduced.</span> <span class="statement" id="st-d0_s8" data-properties="inflorescence architecture;inflorescence shape;panicle condition or size;spikelet quantity"><b>Inflorescences </b>open or contracted panicles, sometimes spikelike, with more than 1 spikelet associated with most nodes;</span> <span class="statement" id="st-d0_s9" data-properties="branch some measurement;branch shape;branch fixation or orientation;branch arrangement">branches longer than 5 mm, capillary, appressed to strongly divergent;</span> <span class="statement" id="st-d0_s10" data-properties="pedicel shape;pedicel fixation or orientation;pedicel arrangement">pedicels capillary, appressed to divergent.</span> <span class="statement" id="st-d0_s11" data-properties="spikelet some measurement;spikelet shape;spikelet architecture or shape;floret quantity;floret reproduction"><b>Spikelets </b>1.5-3.8 mm, laterally compressed, with 2 bisexual florets, both usually awned, the lower floret sometimes unawned, occasionally both unawned;</span> <span class="statement" id="st-d0_s12" data-properties="rachilla pubescence;lowest segment some measurement">rachillas glabrous, lowest segments about 0.2 mm, florets appearing opposite, usually not or scarcely extended beyond the base of the distal floret;</span> <span class="statement" id="st-d0_s13" data-properties="floret size">disarticulation above the glumes and beneath the florets.</span> <span class="statement" id="st-d0_s14" data-properties="glume variability;glume size;glume length or size;glume texture;glume architecture"><b>Glumes </b>equal to subequal, longer than the florets, membranous, 1-3-veined, unawned;</span> <span class="statement" id="st-d0_s15" data-properties="callus pubescence">calluses puberulent;</span> <span class="statement" id="st-d0_s16" data-properties="lemma texture;lemma pubescence;lemma relief;lemma architecture;apex architecture or shape;apex architecture or shape;apex architecture or shape;awn fixation;awn shape;awn course">lemmas subcoriaceous, glabrous, scabridulous, 5-veined, apices bifid, awned or unawned, awns attached below midlength, usually geniculate, sometimes straight;</span> <span class="statement" id="st-d0_s17" data-properties="palea texture;palea architecture">paleas membranous, 2-veined;</span> <span class="statement" id="st-d0_s18" data-properties="lodicule quantity;lodicule fusion">lodicules 2, free;</span> <span class="statement" id="st-d0_s19" data-properties="anther quantity">anthers 3;</span> <span class="statement" id="st-d0_s20" data-properties="ovary pubescence">ovaries glabrous.</span> <span class="statement" id="st-d0_s21" data-properties="caryopse height or length or size;caryopse prominence;caryopse architecture;caryopse shape;lemma life cycle;palea life cycle;x chromosome quantity"><b>Caryopses </b>shorter than the lemmas, concealed at maturity, adhering to the lemmas and/or paleas, longitudinally grooved, dorsally compressed, x = 7.</span><!-- -->{{Treatment/Body |distribution=Wash.;Del.;D.C;Conn.;Mass.;N.Y.;Pacific Islands (Hawaii);Fla.;Wyo.;N.H.;N.J.;N.Mex.;Tex.;La.;Idaho;Oreg.;N.C.;B.C.;N.S.;Yukon;Tenn.;S.C.;Pa.;Calif.;Va.;Alaska;Ala.;Miss.;Ark.;Vt.;Ill.;Ga.;Ind.;Md.;Ohio;Mo.;Okla. |discussion=<p>Aira is a genus of eight species; two have been introduced into the Flora region. All members of the genus are native to temperate Europe and the Mediterranean region, North Africa, and western Asia. Frequently adventive, they are now widespread outside of their native range as weeds, although they are not considered particularly troublesome. They have little forage value because most are delicate, with extremely small leaves. All the species grow in open, disturbed places on usually dry, occasionally mesic, sandy to rocky soils.</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Panicle branches ascending to divergent; panicles 1.2-13.5 cm long, 1.5-10 cm wide |[[Aira caryophyllea|Aira caryophyllea]] |-id=key-0-1 |1 |Panicle branches appressed to the rachises; panicles 0.5—4.1 cm long, 0.3-0.7 cm wide |[[Aira praecox|Aira praecox]] |} </div></div><!-- -->{{#Taxon: name=Aira |author=J.K. Wipff; |authority=L |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Poaceae |distribution=Wash.;Del.;D.C;Conn.;Mass.;N.Y.;Pacific Islands (Hawaii);Fla.;Wyo.;N.H.;N.J.;N.Mex.;Tex.;La.;Idaho;Oreg.;N.C.;B.C.;N.S.;Yukon;Tenn.;S.C.;Pa.;Calif.;Va.;Alaska;Ala.;Miss.;Ark.;Vt.;Ill.;Ga.;Ind.;Md.;Ohio;Mo.;Okla. |reference=None |publication title= |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24_873.xml |subfamily=Poaceae subfam. Pooideae |tribe=Poaceae tribe Poeae |genus=Aira |anther quantity=3 |apex architecture or shape=unawned;awned;bifid |auricle presence=absent |awn course=straight |awn fixation=attached |awn shape=geniculate |branch arrangement=divergent |branch fixation or orientation=appressed |branch shape=capillary |branch some measurement=5 |callus pubescence=puberulent |caryopse architecture=grooved |caryopse height or length or size=shorter |caryopse prominence=concealed |caryopse shape=compressed |culm orientation=erect;decumbent |culm some measurement=1cm;55cm |floret quantity=2 |floret reproduction=bisexual |floret size=extended |glume architecture=1-3-veined |glume length or size=longer |glume size=subequal |glume texture=membranous |glume variability=equal |inflorescence architecture=open |inflorescence shape=spikelike |leaf blade size=reduced |leaf position=cauline |lemma architecture=5-veined |lemma life cycle=maturity |lemma pubescence=glabrous |lemma relief=scabridulous |lemma texture=subcoriaceous |ligule texture=membranous |lodicule fusion=free |lodicule quantity=2 |lowest segment some measurement=0.2 |ovary pubescence=glabrous |palea architecture=2-veined |palea life cycle=maturity |palea texture=membranous |panicle condition or size=contracted |pedicel arrangement=divergent |pedicel fixation or orientation=appressed |pedicel shape=capillary |rachilla pubescence=glabrous |sheath architecture or pubescence or relief=smooth |sheath length=glabrous |sheath relief=scabridulous |spikelet architecture or shape=awned |spikelet shape=compressed |spikelet some measurement=1.5mm;3.8mm |whole_organism arrangement or pubescence=tufted |whole_organism duration=annual |whole_organism growth form=plant |x chromosome quantity=7 }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Poeae]] 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 Aira.