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This species is accepted, and its native range is E. Himalaya to N. & Central China.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Ligule an eciliate membrane.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; effuse; 20-35 cm long. Primary panicle branches ascending, or spreading; 4-5 -nate; whorled at most nodes; 10-15 cm long. Panicle axis scaberulous. Panicle branches capillary; flexuous; scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 3.5 mm long; 1.1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex obtuse. Upper glume elliptic; 3 mm long; 1 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 3 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0-0.1 way up back of lemma; geniculate; 5 mm long overall; with twisted column. Palea 3 mm long. Rhachilla extension pilose; with 1.5-2 mm long hairs.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
Distribution
Asia-temperate: China.
Reference
Aveneae. Rendle 1995.

Native to:

China North-Central, China South-Central, China Southeast, East Himalaya, Inner Mongolia

Calamagrostis effusiflora (Rendle) P.C.Kuo & S.L.Lu ex J.L.Yang appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Rockhill, W.W. [s.n.], Sichuan K000838289
Henry, A. [978], Hubei K000838288

First published in Fl. Sichuanica 5(2): 88 (1988)

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.
  • Nobis, M. & al. (2015). Contribution to the flora of Asian and European countries: new national and regional vascular plant records, 4 Acta Botanica Gallica: Botany Letters 162: 301-316.

Literature

Kew Backbone Distributions

  • Nobis, M. & al. (2015). Contribution to the flora of Asian and European countries: new national and regional vascular plant records, 4 Acta Botanica Gallica: Botany Letters 162: 301-316.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

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