Difference between revisions of "×achnella caduca"

(Beal) Barkworth
Common names: Dropawn
Treatment appears in FNA Volume 24. Treatment on page 169.
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|distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr.
 
|distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr.
|discussion=<p>×Achnella caduca is a sterile hybrid between Achnatherum hymenoides and Nassella viridula that occurs infrequently in Montana and Wyoming. It differs from Achnatherum hymenoides in its longer glumes and florets; from Nassella viridula in its more saccate glumes, longer lemma hairs, and well-developed palea; and from other hybrids involving Achnatherum hymenoides in its readily deciduous awn.</p>
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|discussion=<p>×Achnella caduca is a sterile hybrid between <i>Achnatherum hymenoides</i> and <i>Nassella viridula</i> that occurs infrequently in Montana and Wyoming. It differs from <i>Achnatherum hymenoides</i> in its longer glumes and florets; from <i>Nassella viridula</i> in its more saccate glumes, longer lemma hairs, and well-developed palea; and from other hybrids involving <i>Achnatherum hymenoides</i> in its readily deciduous awn.</p>
 
|tables=
 
|tables=
 
|references=
 
|references=
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-->{{#Taxon:
 
-->{{#Taxon:
 
name=×achnella caduca
 
name=×achnella caduca
|author=
 
 
|authority=(Beal) Barkworth
 
|authority=(Beal) Barkworth
 
|rank=species
 
|rank=species
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|basionyms=
 
|basionyms=
 
|family=Poaceae
 
|family=Poaceae
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|illustrator=Cindy Roché
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|illustration copyright=Utah State University
 
|distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr.
 
|distribution=Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;Mont.;N.Dak.;Nebr.
 
|reference=None
 
|reference=None
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|publication year=
 
|publication year=
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V24/V24_233.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_233.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Stipeae
 
|tribe=Poaceae tribe Stipeae

Latest revision as of 16:22, 11 May 2021

Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Culms 50-90 cm, glabrous. Basal sheaths mostly glabrous, margins and throats usually ciliate; ligules 0.5-1.7 mm, truncate-rounded; blades 1-3.5 mm wide. Panicles 15-18 cm; branches ascending. Lower glumes 6-8.5 mm long, 1-1.6 mm wide; florets 4-5 mm; calluses about 0.7 mm; lemmas 7-veined, hairy, hairs 1-2 mm, apices awned; awns 9-16 mm, readily deciduous; paleas 2.5-3.3 mm, 2/3 - 3/4 the length of the lemmas, hairy; anthers 2, 1.7-2.3 mm, differing in length within the florets, indehiscent. 2n = 65.

Distribution

Alta., B.C., Man., N.W.T., Sask., Yukon, Mont., N.Dak., Nebr.

Discussion

×Achnella caduca is a sterile hybrid between Achnatherum hymenoides and Nassella viridula that occurs infrequently in Montana and Wyoming. It differs from Achnatherum hymenoides in its longer glumes and florets; from Nassella viridula in its more saccate glumes, longer lemma hairs, and well-developed palea; and from other hybrids involving Achnatherum hymenoides in its readily deciduous awn.

Selected References

None.

Lower Taxa

None.