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

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect; 50-100 cm long. Culm-internodes terete; smooth; distally glabrous. Culm-nodes glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 2-3 mm long; membranous; obtuse. Leaf-blades 50-100 cm long; 4-8 mm wide; aromatic. Leaf-blade surface scabrous; rough on both sides; glabrous. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Synflorescence compound; linear; 15-35 cm long; lax. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; exserted. Spatheole elliptic; 1.5-2.6 cm long; red. Racemes 2; paired; ascending; 1.3-2.5 cm long. Rhachis fragile at the nodes; semiterete. Rhachis internodes linear; 3 mm long. Rhachis internode tip transverse; cupuliform. Raceme-bases flattened; unequal (the longer measured); pubescent. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; semiterete; 2.5 mm long; tip widened.
Sterile
Basal sterile spikelets well-developed; 2 in number (lower raceme); 0 in upper raceme; with normal internodes; sessile and pedicelled. Basal sterile spikelet pedicels free; linear. Basal sterile spikelets male; equalling fertile. Basal sterile spikelet lower glume muticous. Companion sterile spikelets well-developed; male; elliptic; 3 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; 9 -veined; smooth; glabrous; acute; muticous. Companion sterile spikelet lemmas 2; enclosed by glumes.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 3.5-4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pubescent; base obtuse; inserted. Basal sterile spikelets well-developed; 2 in number (lower raceme); 0 in upper raceme; with normal internodes; sessile and pedicelled. Basal sterile spikelet pedicels free; linear. Basal sterile spikelets male; equalling fertile. Basal sterile spikelet lower glume muticous. Companion sterile spikelets well-developed; male; elliptic; 3 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; 9 -veined; smooth; glabrous; acute; muticous. Companion sterile spikelet lemmas 2; enclosed by glumes.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 3.5-4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pubescent; base obtuse; inserted.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume oblong; 1 length of spikelet; chartaceous; 2-keeled; keeled all along; keeled laterally; winged on keel; winged narrowly. Lower glume primary vein scabrous. Lower glume intercarinal veins absent, or obscure; 1 in number. Lower glume surface flat. Upper glume lanceolate; 1-keeled; keeled above; winged on keel. Upper glume primary vein scabrous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 3-5 mm long; hyaline; 2 -veined; ciliate on margins; fringed above. Fertile lemma lanceolate; 3 mm long; hyaline; without keel. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 7 mm long overall; with twisted column. Column of lemma awn 2.5 mm long; glabrous. Palea absent or minute.
Morphology Reproductive morphology Flowers
Anthers 3; 1.75 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 3 mm long.
Distribution
Asia-tropical: India.
Reference
Andropogoneae. Bor 1999.

Native to:

Assam, Nepal

Cymbopogon exsertus (Hack.) A.Camus appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Wallich, N. [8794], India K000245883 isotype
Wallich, N. [8794], India K000245884 isotype

First published in Rev. Bot. Appl. Agric. Colon. 1: 287 (1921)

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.
  • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • Sarmah, K.K. & Borthakur, S.K. (2009). A checklist of angiospermic plants of Manas national park in Assam, India Pleione 3: 190-200.

Literature

Kew Backbone Distributions

  • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • Sarmah, K.K. & Borthakur, S.K. (2009). A checklist of angiospermic plants of Manas national park in Assam, India Pleione 3: 190-200.

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