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

[GB]
Morphology General Habit
Perennial; caespitose. Butt sheaths pubescent. Culms erect; 70-120 cm long. Culm-internodes distally glabrous. Culm-nodes bearded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5-1.5 mm long. Leaf-blades 20-60 cm long; 6-10 mm wide; light green; aromatic. Leaf-blade surface glabrous; hairless except near base.
Morphology Reproductive morphology Inflorescences
Synflorescence compound; linear; 15-20 cm long. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole elliptic; 1.5 cm long. Peduncle 0.6-1 cm long. Racemes 2; paired; deflexed; 1.5 cm long. Rhachis fragile at the nodes; semiterete; glabrous on surface; ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse; cupuliform. Raceme-bases flattened; unequal (the longer measured). Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; semiterete; ciliate.
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; lanceolate; 4.5 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; 7 -veined; 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 lanceolate; dorsally compressed; 4-4.5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus 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; lanceolate; 4.5 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; 7 -veined; acute; muticous. Companion sterile spikelet lemmas 2; enclosed by glumes.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4-4.5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; 2-keeled; keeled all along; keeled laterally; winged on keel; winged narrowly. Lower glume intercarinal veins absent, or obscure; 0-2 in number. Lower glume surface flat; smooth, or wrinkled. Upper glume lanceolate; 1-keeled; keeled above. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret hyaline. Fertile lemma lanceolate; hyaline; without keel. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 11 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: Indo-China.
Reference
Andropogoneae. Soenarko 1993.

Native to:

Thailand

Cymbopogon calciphilus Bor appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1975 Kerr, A.F.G. [13478], Thailand K000620250
Jan 1, 1975 Kerr, A.F.G. [19876], Thailand K000620253
Jan 1, 1975 Put [4319], Thailand K000620260
Jan 1, 1975 Smitinand, T. [2028], Thailand K000688813
Jan 1, 1975 Smitinand, T. [3870], Thailand K000688814
Jan 1, 1975 Marcan, A. [2437], Thailand K000620259
Jan 1, 1975 Kerr, A.F.G. [13478], Thailand K000620251
Jan 1, 1975 Kerr, A.F.G. [13478], Thailand K000620249
Jan 1, 1975 Kerr, A.F.G. [19876], Thailand K000620254
Jan 1, 1975 Put [4319], Thailand K000620261
Jan 1, 1975 Kerr, A.F.G. [19998], Thailand K000620256
Jan 1, 1975 Kerr, A.F.G. [19998], Thailand K000620255
Jan 1, 1975 Kerr, A.F.G. [13478], Thailand K000620252
Jan 1, 1974 Kerr, A.F.G. [20596], Thailand K000620258
Jan 1, 1974 Smitinand [6165], Thailand K000688815
Jan 1, 1974 Kerr, A.F.G. [20596], Thailand K000620257
Larsen, K. [8335], Thailand K000290046 holotype
Ryves, T.B. [KS95/052], Thailand K000688811
Ryves, T.B. [KS95/052], Thailand K000688812

First published in Dansk Bot. Ark. 23: 157 (1965)

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