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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Chrysopogon crevostii
HABIT Perennial; caespitose; clumped densely. Culms erect; 90–120 cm long. Culm-internodes distally glabrous. Lateral branches ample. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; truncate. Leaf-blades 20–25 cm long; 1.5–2 mm wide. Leaf-blade venation indistinct. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins scaberulous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.
Panicle open; ovate; 9–10 cm long. Primary panicle branches 3 cm long. Panicle branches capillary.
Racemes bearing a triad of spikelets; 1 fertile spikelets on each.
Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels linear; 0.2 length of fertile spikelet; ciliate; with red hairs.
STERILE SPIKELETS Companion sterile spikelets well-developed; male; lanceolate; 7–9 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 7 -veined; ciliate on margins; awned; one glume awned; with 7–10 mm long awn. Companion sterile spikelet lemmas 2; enclosed by glumes; 4–6 mm long; muticous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 7–8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 0.8–1 mm long; pilose; base acute; attached obliquely. Spikelet callus hairs red.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; chartaceous; without keels. Upper glume lanceolate; coriaceous; with hyaline margins; 1-keeled. Upper glume surface glabrous, or pilose. Upper glume awned; 1 -awned. Upper glume awn 15–16 mm long.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; hyaline; ciliolate on margins. Fertile lemma oblong; hyaline; without keel. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 50 mm long overall; with twisted column. Column of lemma awn pubescent. Palea absent or minute.
FLOWER Anthers 3; 3.5 mm long.
DISTRIBUTION Asia-tropical: Indo-China.
NOTES Andropogoneae. Camus 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
