Difference between revisions of "Calamagrostis tweedyi"

(Scribn.) Scribn.
Common names: Cascade reedgrass Tweedy's reedgrass
Treatment appears in FNA Volume 24. Treatment on page 714.
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|distribution=Mont.;Idaho;Wash.
 
|distribution=Mont.;Idaho;Wash.
|discussion=<p>Calamagrostis tweedyi grows in montane to subalpine moist meadows and coniferous forests, often in association with Carex geyeri, at 900-2000 m. Its range extends from Washington and Oregon to western Montana.</p>
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|discussion=<p><i>Calamagrostis tweedyi</i> grows in montane to subalpine moist meadows and coniferous forests, often in association with <i>Carex geyeri</i>, at 900-2000 m. Its range extends from Washington and Oregon to western Montana.</p>
 
|tables=
 
|tables=
 
|references=
 
|references=
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-->{{#Taxon:
 
-->{{#Taxon:
 
name=Calamagrostis tweedyi
 
name=Calamagrostis tweedyi
|author=
 
 
|authority=(Scribn.) Scribn.
 
|authority=(Scribn.) Scribn.
 
|rank=species
 
|rank=species
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|basionyms=
 
|basionyms=
 
|family=Poaceae
 
|family=Poaceae
|illustrator=Cindy Roché and Hana Pazdírková
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|illustrator=Cindy Roché;Hana Pazdírková
 +
|illustration copyright=Utah State University
 
|distribution=Mont.;Idaho;Wash.
 
|distribution=Mont.;Idaho;Wash.
 
|reference=None
 
|reference=None
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|publication year=
 
|publication year=
 
|special status=
 
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/314eb390f968962f596ae85f506b4b3db8683b1b/coarse_grained_fna_xml/V24/V24_1006.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V24/V24_1006.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Poeae
 
|tribe=Poaceae tribe Poeae

Revision as of 21:16, 16 December 2019

Plants without sterile culms; loosely cespitose, with rhizomes 1-10 cm long, 2-4 mm thick. Culms (47)60-120(150) cm, unbranched, smooth, rarely slightly scabrous; nodes 2-3. Sheaths and collars smooth; ligules (1)3.5-6(8) mm, obtuse, lacerate; blades (3)4-20(38) cm long, (2)3-8(13) mm wide, culm blades wider than 6 mm, flat, abaxial surfaces smooth, adaxial surfaces smooth or slightly scabrous, glabrous or sparsely hairy. Panicles 7-16(19) cm long, (1)1.5-2 cm wide, erect, usually contracted, sometimes interrupted near the base, pale purple to purple; branches (0.2)2.4-6.7(7.7) cm, smooth, sometimes sparsely scabrous distally, spikelet-bearing to the base. Spikelets (4.5)5.5-8(9) mm; rachilla prolongations (0.5)1-2(4) mm, hairs 1.5-3 mm. Glumes keeled, smooth or the keels scabrous, lateral veins prominent, apices acute; callus hairs 0.8-1 mm, 0.2-0.3 times as long as the lemmas, sparse; lemmas (4)4.5-6.5(7.5) mm, 0-1.5 mm shorter than the glumes, scabridulous; awns 6-8 mm, attached to the lower 1/5 – 3/10 of the lemmas, exserted more than 2 mm, stout, easily distinguished from the callus hairs, bent; anthers 2-3.5 mm. 2n = unknown.

Discussion

Calamagrostis tweedyi grows in montane to subalpine moist meadows and coniferous forests, often in association with Carex geyeri, at 900-2000 m. Its range extends from Washington and Oregon to western Montana.

Selected References

None.

Lower Taxa

None.