Family:
Poaceae Barnhart
Genus:
Cymbopogon Spreng.

Cymbopogon xichangensis R.Zhang & B.S.Sun

This species is accepted, and its native range is China (Sichuan).

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 100-250 cm long; 3-5 mm diam.; 3-4 -noded. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.5 mm long; membranous; erose; obtuse. Leaf-blades 30-60 cm long; 5-12 mm wide; aromatic.
Morphology Reproductive morphology Inflorescences
Synflorescence compound; paniculate; 80-180 cm long; open. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole elliptic; 4-5 cm long; glabrous. Racemes 2; paired; 3-4 cm long; bearing 4-6 fertile spikelets on each. Rhachis fragile at the nodes; semiterete; ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse; cupuliform. Raceme-bases flattened; subequal. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; semiterete; ciliate; hairy on margins; with 1.5 mm long hairs.
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 equalling fertile. Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; 6-8 mm long; shorter than fertile, or as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; distinctly 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; 7-9 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; 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 equalling fertile. Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; 6-8 mm long; shorter than fertile, or as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes chartaceous; distinctly 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; 7-9 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; 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 distinct; 2-4 in number. Lower glume surface concave; smooth. Upper glume lanceolate; 1-keeled. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret hyaline; ciliate on margins. Fertile lemma linear; hyaline; without keel. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 12 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 2 mm long.
Distribution
Asia-temperate: China.
Reference
Andropogoneae. Zhang & Sun 2006.

Native to:

China South-Central

Cymbopogon xichangensis R.Zhang & B.S.Sun appears in other Kew resources:

First published in J. Pl. Resourc. Environ. 2(2): 40 (1993)

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.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

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

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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