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This species is accepted, and its native range is China (Sichuan, Yunnan).
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Culms slender; 100 cm long; 1 mm diam.; 6 -noded; with 0.66 of their length below uppermost node. Culm-internodes smooth, or scaberulous. Lateral branches lacking. Leaf-sheaths 16 cm long; antrorsely scabrous. Ligule an eciliate membrane; 1-4 mm long; lacerate. Leaf-blades 5-17 cm long; 1-4 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 18 cm long; 14 cm wide. Primary panicle branches drooping; 2-5 -nate; 10 cm long. Panicle branches capillary; smooth. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 2-4 mm long; scabrous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.75 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.75 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 4 mm long; 1.1 length of upper glume; membranous; light green and purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.5 mm long; 1 length of adjacent fertile lemma; membranous; light green and purple; 1-keeled; 3 -veined. Upper glume primary vein smooth. Upper glume lateral veins obscure. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 3.5 mm long; hyaline; without keel; 5 -veined. Lemma apex dentate; 2 -fid; obtuse; muticous. Palea 0.5 length of lemma; hyaline; 2 -veined. Rhachilla extension 0.8 mm long; villous; with 2.5 mm long hairs.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 0.7 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 2 mm long; light brown. Hilum punctiform.
Distribution
Asia-temperate: China.
Reference
Aveneae. Keng 1996.

Native to:

China South-Central

Calamagrostis flaccida Keng f. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Keng, Y.L. [3797], Sichuan K000794985 Unknown type material

First published in Bull. Bot. Res., Harbin 4(3): 195 (1984)

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.

Literature

Kew Backbone Distributions

  • 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