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This species is accepted, and its native range is Central & E. China to S. Russian Far East and Japan.

[GB]
Habit
Perennial; caespitose; clumped densely. Culms 90-135 cm long. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 3-4(-7) mm long; entire, or lacerate; truncate. Leaf-blades convolute; 25-35 cm long; 5 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scaberulous.
Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; interrupted; 12-17(-22) cm long; 1.2-2.5 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 5.5-6.9 mm long; 1.3-1.5 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 5.5-6.9 mm long; 1.3-1.5 length of lemma.
Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 6-7 mm long; 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; 6-7 mm long; 1.4 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acuminate.
Florets
Fertile lemma oblong; 4-5 mm long; membranous; without keel; 3 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 2.5-3 mm long overall. Palea 2.6-3 mm long; 0.6-0.8 length of lemma; hyaline; 2 -veined. Palea keels scaberulous. Rhachilla extension 0.5-0.8 mm long; pilose; hairy above.
Flowers
Lodicules 2. Anthers 3. Stigmas 2.
Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Asia-temperate: China.
Reference
Aveneae. Wang 1996.

Native to:

Amur, China North-Central, China South-Central, China Southeast, Japan, Khabarovsk, Korea, Kuril Is., Manchuria, Primorye, Sakhalin

Calamagrostis extremiorientalis (Tzvelev) Prob. appears in other Kew resources:

First published in Sosud. Rast. Sovet. Dal'nego Vostoka 1: 200 (1985)

Accepted by

  • Paszko, B. & Ma, H. (2011). Taxonomic revision of the Calamagrostis epigeios complex with particular reference to China Journal of systematics and evolution 49: 495-504.
  • 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.

Not accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Calamagrostis epigeios.]

Literature

Kew Backbone Distributions

  • Paszko, B. & Ma, H. (2011). Taxonomic revision of the Calamagrostis epigeios complex with particular reference to China Journal of systematics and evolution 49: 495-504.
  • 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

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