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This species is accepted, and its native range is Kamchatka to W. U.S.A.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose; clumped densely. Rhizomes short. Culms robust; 80-160 cm long. Lateral branches lacking. Ligule a ciliolate membrane; 6-8 mm long; truncate. Collar glabrous. Leaf-blades erect; flat, or involute; 6-12 mm wide; coriaceous. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; 12-20 cm long; 1.5-2 cm wide. Primary panicle branches ascending. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4.5-6.5 mm long; 1.1-1.4 length of adjacent fertile lemma; membranous; 1-keeled; 1-3 -veined. Upper glume primary vein scaberulous. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 4-4.5 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; straight, or geniculate; 0.5-2 mm long overall; not or scarcely exserted from spikelet; with a straight or slightly twisted column. Palea 1 length of lemma. Rhachilla extension 1 mm long; 0.25 length of fertile floret; pubescent.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.8 mm long. Anthers 3; 3 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
Distribution
Asia-temperate: Soviet far east. North America: Subarctic, western Canada, northwest USA, and southwest USA.
Reference
Aveneae. Fl Pac NW 1994.

Native to:

Alaska, Aleutian Is., British Columbia, California, Kamchatka, Oregon, Washington

Calamagrostis nutkaensis (J.Presl) Steud. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Macoun, J. [18], British Columbia K000838369
s.coll. [s.n.], Alaska K000838306

First published in Syn. Pl. Glumac. 1: 190 (1854)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.

Literature

Kew Backbone Distributions

  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Hultén, E.O.G. (1960). Flora of the Aleutian Islands and westernmost Alaska Peninsula: with notes on the flora of Commander Islands, ed. 2: 1-376. Weinheim : J. Cramer ; New York : Hafner Pub. Co.
  • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0