View source for ×achnella ← ×achnella 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=×achnella |accepted_authority=Barkworth |publications= |basionyms= |synonyms= |hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Stipeae;×achnella |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 Stipeae]]</div><div class="higher-taxon"><small>genus</small>[[×achnella]]</div></div> |volume=Volume 24 |mention_page= |treatment_page=page 169 }}<!-- --><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>perennial;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism duration;whole_organism growth form;whole_organism architecture;whole_organism growth form">cespitose, not rhizomatous.</span> <span class="statement" id="st-d0_s2" data-properties="culm some measurement;culm orientation;culm pubescence;culm architecture"><b>Culms </b>to 90 cm, erect, glabrous, not branching at the upper nodes;</span> <span class="statement" id="st-d0_s3" data-properties="prophyll height or length or size">prophylls shorter than the sheaths.</span> <span class="statement" id="st-d0_s4" data-properties="sheath pubescence;margin architecture or pubescence or shape;hair length or size"><b>Sheaths </b>mostly glabrous, margins sparsely ciliate, hairs longer distally;</span> <span class="statement" id="st-d0_s5" data-properties="cleistogene presence">cleistogenes not present in the basal sheaths;</span> <span class="statement" id="st-d0_s6" data-properties="">collars without tufts of hair at the sides;</span> <span class="statement" id="st-d0_s7" data-properties="auricle presence">auricles absent;</span> <span class="statement" id="st-d0_s8" data-properties="ligule texture;ligule pubescence">ligules scarious, glabrous;</span> <span class="statement" id="st-d0_s9" data-properties="leaf blade length;leaf blade width;leaf blade arrangement or shape;leaf blade shape;apex shape;blade-leaf distance">blades of basal leaves to 40 cm long, 1-1.5 mm wide, convolute when dry, tapering to the narrowly acute apices, flag leaf-blades longer than 10 mm, bases about as wide as the top of the sheaths.</span> <span class="statement" id="st-d0_s10" data-properties=""><b>Inflorescences </b>panicles.</span> <span class="statement" id="st-d0_s11" data-properties="spikelet some measurement;floret quantity"><b>Spikelets </b>6-8.5 mm, with 1 floret;</span> <span class="statement" id="st-d0_s12" data-properties="">rachillas not prolonged beyond the base of the floret;</span> <span class="statement" id="st-d0_s13" data-properties="rachilla length">disarticulation above the glumes, beneath the floret.</span> <span class="statement" id="st-d0_s14" data-properties="glume shape;glume shape;apex shape;apex shape"><b>Glumes </b>saccate-lanceolate, tapering from above midlength into elongate apices, midveins extending to or nearly to the apices, apices narrowly acute to acuminate;</span> <span class="statement" id="st-d0_s15" data-properties="lower glume some measurement">lower glumes 6-8.5 mm;</span> <span class="statement" id="st-d0_s16" data-properties="upper glume some measurement;upper glume width">upper glumes 6.5-7.5 mm, slightly narrower than the lower glumes;</span> <span class="statement" id="st-d0_s17" data-properties="floret some measurement;floret length">florets 4-5 mm, lengths more than 3 times the widths;</span> <span class="statement" id="st-d0_s18" data-properties="callus some measurement;callus shape">calluses about 0.7 mm, blunt;</span> <span class="statement" id="st-d0_s19" data-properties="lemma texture;lemma pubescence;hair some measurement">lemmas coriaceous, evenly hairy throughout, hairs 1-2 mm, apical hairs not longer than those below;</span> <span class="statement" id="st-d0_s20" data-properties="awn architecture;awn shape;awn duration">awns twisted, not or once-geniculate, readily deciduous;</span> <span class="statement" id="st-d0_s21" data-properties="palea quantity;palea quantity">paleas more than 2/3 as long as the lemmas, veins ending at the apices;</span> <span class="statement" id="st-d0_s22" data-properties="anther development;anther dehiscence;hair quantity">anthers poorly developed, indehiscent, sometimes with 1 or 2 penicillate hairs.</span><!-- -->{{Treatment/Body |distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr. |discussion=<p>×Achnella comprises sterile hybrids between Achnatherum and Nassella. Only one such hybrid is known; it is restricted to the Flora region.</p> |tables= |references={{Treatment/Reference |id=johnson1943b |text=Johnson, B.L. and G.A. Rogler. 1943. A cytotaxonomic study of an intergeneric hybrid between Oryzopsis bymenoides and Stipa viridula. Amer. J. Bot. 30:49-56. }} }}<!-- --><!-- -->{{#Taxon: name=×achnella |author=Mary E. Barkworth; |authority=Barkworth |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Poaceae |illustrator=Cindy Roché |illustration copyright=Utah State University |distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr. |reference=johnson1943b |publication title= |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24_232.xml |subfamily=Poaceae subfam. Pooideae |tribe=Poaceae tribe Stipeae |genus=×achnella |anther dehiscence=indehiscent |anther development=developed |apex shape=narrowly acute;acuminate |auricle presence=absent |awn architecture=twisted |awn duration=deciduous |awn shape=not once-geniculate |blade-leaf distance=10 |callus shape=blunt |callus some measurement=0.7 |cleistogene presence=not absent |culm architecture=not branching |culm orientation=erect |culm pubescence=glabrous |culm some measurement=0cm;90cm |floret length=3+ times the widths |floret quantity=1 |floret some measurement=4mm;5mm |glume shape=tapering;saccate-lanceolate |hair length or size=longer |hair quantity=1 |hair some measurement=1mm;2mm |leaf blade arrangement or shape=convolute |leaf blade length=40 |leaf blade shape=tapering |leaf blade width=1mm;1.5mm |lemma pubescence=hairy |lemma texture=coriaceous |ligule pubescence=glabrous |ligule texture=scarious |lower glume some measurement=6mm;8.5mm |margin architecture or pubescence or shape=ciliate |palea quantity=/3;2 |prophyll height or length or size=shorter |rachilla length=not prolonged |sheath pubescence=glabrous |spikelet some measurement=6mm;8.5mm |upper glume some measurement=6.5mm;7.5mm |upper glume width=slightly narrower |whole_organism architecture=not rhizomatous |whole_organism duration=perennial |whole_organism growth form=plant;cespitose }}<!-- -->[[Category:Treatment]][[Category:Poaceae tribe Stipeae]] 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 ×achnella.