Arctagrostis

Griseb.
Treatment appears in FNA Volume 24. Treatment on page 676.
Plants perennial; rhizomatous. Culms 10-150 cm, erect, glabrous. Sheaths usually closed for up to 1/5 their length; auricles absent; ligules membranous, obtuse, erose or lacerate; blades usually flat, glabrous, scabrous. Inflorescences terminal panicles, loose and open to narrow and contracted; branches 0.5-27 cm, scabridulous. Spikelets 3-6.5 mm, pedicellate, laterally compressed, usually with 1 floret, rarely with 2; rachillas hairy or scabrous, sometimes prolonged beyond the base of the single floret or terminating in a well-formed or vestigial floret; disarticulation above the glumes, beneath the floret(s). Glumes usually shorter than the lemmas, upper glumes sometimes equaling the lemma(s), ovate to lanceolate, glabrous, sometimes scabridulous, 1-3-veined, acute to obtuse, unawned; calluses weakly developed, glabrous; lemmas scabrous or puberulent, 3-5-veined, lateral veins sometimes obscure, not reaching the apices, apices obtuse to acute, sometimes mucronate, unawned; paleas about as long as the lemmas, folded along 1 prominent vein, the second vein faint; lodicules 2, glabrous; anthers 3; ovaries glabrous. Caryopses 1.7-3 mm, shorter than the lemmas, concealed at maturity; hila 1/4-1/3 the length of the caryopses. x = 7.

Distribution

Alta., B.C., Greenland, Nfld. And Labr. (Nfld.), Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska

Discussion

Arctagrostis is a circumpolar genus with one species and two subspecies.

Facts about "Arctagrostis"
AuthorSusan G. Aiken +
AuthorityGriseb. +
DistributionAlta. +, B.C. +, Greenland +, Nfld. And Labr. (Nfld.) +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon + and Alaska +
Referenceaiken1990b +, aiken1994a +, aiken1995a + and mitchell1992a +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V24/V24 954.xml +
SynonymsGramineae +
Taxon familyPoaceae +
Taxon nameArctagrostis +
Taxon parentPoaceae tribe Poeae +
Taxon rankgenus +
VolumeVolume 24 +