familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusArctagrostis
speciesArctagrostis latifolia
Arctagrostis latifolia subsp. arundinacea
Common names: Reed polargrass
Synonyms: Arctagrostis poaeoides Arctagrostis arundinacea Arctagrostis angustifolia
Treatment appears in FNA Volume 24. Treatment on page 678.
Culms (24)50-150 cm; uppermost nodes usually towards the middle of the culm. Uppermost sheaths shorter than the blades; blades 4-36 cm long, 2.4-15 mm wide. Panicles (4)10-35(44) cm long, 0.7-10(14+) cm wide; longest branches (1.4)3-27 cm, with (5)50-140 spikelets per branch; secondary branches usually spreading. Spikelets 3-5.2 mm. Glumes unequal; lower glumes 2.3-3.6 mm, 1(2)-veined; upper glumes 3-4.8 mm, shorter than to longer than the lemmas, 3-veined; lemmas 2.4-4.8 mm; anthers 1.3-3.5 mm. 2n = 28, 42.
Discussion
Arctagrostis latifolia subsp. arundinacea is the predominant subspecies from Alaska east to the western Northwest Territories, northern British Columbia, and Alberta. Cultivars for hay and revegetation mixes have been developed.
Selected References
None.
Lower Taxa
None.