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This species is accepted, and its native range is Sumatera.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect; 40-50 cm long. Ligule an eciliate membrane; 2-3 mm long. Leaf-blades involute; 10-15 cm long; 2.5-7 mm wide; stiff. Leaf-blade apex pungent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; lanceolate; 10-15 cm long; 1.5-3 cm wide. Primary panicle branches 2-5 -nate. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.2-0.33 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.2-0.33 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 5-6 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume lanceolate; 5-6 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 4-4.5 mm long; chartaceous; without keel; 5 -veined. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn from a sinus; straight; 0.5 mm long overall; not or scarcely exserted from spikelet. Palea keels smooth. Rhachilla extension 1 mm long; pilose.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 1-1.5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
Distribution
Asia-tropical: Malesia.
Reference
Aveneae. Ohwi 1994.

Native to:

Sumatera

Calamagrostis atjehensis Ohwi appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Oct 1, 1993 Steenis, C.G.G.J.Van. [9583], Sumatera K000290487 isotype

First published in Bull. Tokyo Sci. Mus. 18: 13 (1947)

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.

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