Podagrostis aequivalvis

(Trin.) Scribn. & Merr.)
Common names: Arctic bent
Endemic
Synonyms: Agrostis aequivalvis
Treatment appears in FNA Volume 24. Treatment on page 693.
Revision as of 21:51, 3 December 2021 by GeoffLevin (talk | contribs) (Restored authority to match print)
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Illustrator: Sandy Long

Copyright: Utah State University

Plants rhizomatous. Culms 25-90 cm, erect; nodes 2-4(6). Sheaths smooth; ligules 0.4-4 mm, scabridulous, truncate to subacute, entire or lacerate; blades 4-18 cm long, 1-2.5 mm wide, flat. Panicles 5-15 cm long, 2-10 cm wide, lanceolate to ovate, often drooping, sparsely branched, lowest nodes with 1-4(5) branches; branches usually scabridulous, sometimes smooth, erect to ascending or spreading, spikelets usually restricted to the distal 1/2; lower branches 3-6 cm; pedicels 2-10 mm. Spikelets narrowly ovate to lanceolate, usually purplish bronze, sometimes greenish purple; rachilla prolongations 0.5-1.9 mm, bristlelike, distal hairs shorter than 0.3 mm. Glumes 2.3-4.3 mm, veins sparsely scabridulous distally, apices acute to acuminate, sometimes apiculate; lower glumes usually equal to the upper glumes, usually 3-veined, lateral veins faint; calluses glabrous or with sparse hairs shorter than 0.1 mm; lemmas 2.5-3.5 mm, smooth, opaque, (3)5-veined, veins usually obscure, apices acute, entire or the veins minutely excurrent to about 0.3 mm, unawned; paleas 2-3 mm; anthers 3, 0.8-1.3 mm. Caryopses 1.2-1.5 mm; endosperm solid. 2n = 14.

Discussion

Podagrostis aequivalvis grows along lake, bog, and stream margins, and in forest fens. It is common in the coastal regions of Alaska and British Columbia, and occurs less frequently inland, as well as to about 1500 m in the Cascade Mountains south to Oregon.

Selected References

None.

Lower Taxa

None.