Difference between revisions of "Piptatherum canadense"
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| − | |discussion=<p>Piptatherum canadense grows in grasslands and open woods, from the British Columbia-Alberta border east to Newfoundland, extending south into the Great Lakes region and the northeastern United States. Its persistent, longer awns distinguish P. canadense from P. pungens.</p> | + | |discussion=<p><i>Piptatherum canadense</i> grows in grasslands and open woods, from the British Columbia-Alberta border east to Newfoundland, extending south into the Great Lakes region and the northeastern United States. Its persistent, longer awns distinguish <i>P. canadense</i> from <i>P. pungens</i>.</p> |
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V24/V24_197.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Stipeae | |tribe=Poaceae tribe Stipeae | ||
Revision as of 17:18, 18 September 2019
Plants cespitose, not rhizomatous. Culms 30-90 cm, glabrous; basal branching mostly intravaginal. Leaves basally concentrated; sheaths smooth or scabridulous; ligules 1-4 mm, hyaline, truncate, rounded, or acute; basal blades 4-15 cm long, 1-1.5 mm wide when flat, 0.5-0.8 mm in diameter when folded or convolute. Panicles 9-15 cm, lower nodes with 1-2 branches; branches 1-6 cm, somewhat flexuous, ascending to divergent. Glumes subequal, 3-6 mm long, 1.3-2 mm wide, ovate, 1-3-veined, apices acute to mucronate; florets 2.2-4.5 mm, obovoid, dorsally compressed; calluses 0.2-0.5 mm, hairy, disarticulation scars elliptic; lemmas coriaceous, evenly pubescent, tan at maturity, margins widely separated even when immature; awns 5-15 mm, persistent, once- or twice-geniculate, first segments strongly twisted; paleas similar to the lemmas in length, texture, and pubescence; anthers 1-2 mm; ovaries developing 2 conelike style bases, each bearing a single, unbranched style. Caryopses about 2.5 mm long, 0.5 mm thick; hila linear, almost equaling the caryopses. 2n = 22.
Discussion
Piptatherum canadense grows in grasslands and open woods, from the British Columbia-Alberta border east to Newfoundland, extending south into the Great Lakes region and the northeastern United States. Its persistent, longer awns distinguish P. canadense from P. pungens.
Selected References
None.