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

[GB]
Morphology General Habit
Perennial. Culms erect; 50-100 cm long. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1-2 mm long. Leaf-blades 15-30 cm long; 2-4 mm wide; light green.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; effuse; 10-20 cm long. Primary panicle branches spreading; 3-5 -nate. Panicle branches capillary; flexuous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate, or ovate; 4.5-5.5 mm long; 1.1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; awned; 1 -awned. Upper glume lanceolate; 4-5 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate; awned; 1 -awned.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 3.5-4 mm long; membranous; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface scaberulous; rough above. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.75-0.8 way up back of lemma; flexuous; 4-5 mm long overall. Palea 2.5-3 mm long; hyaline; 2 -veined. Rhachilla extension 1 mm long; pilose; hairy at tip; with 3 mm long hairs.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 1.5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Asia-tropical: India.
Reference
Aveneae. Fl Assam 1993.

Native to:

Assam, East Himalaya, West Himalaya

Calamagrostis nagarum (Bor) G.Singh appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1984 Bor, N.L. [2834], Assam K000032378 Unknown type material

First published in Taxon 33: 94 (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.
  • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
  • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.

Literature

Kew Backbone Distributions

  • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
  • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.

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