GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Chionachne semiteres

HABIT Annual. Culms decumbent; 30–70 cm long. Ligule an eciliate membrane; 3 mm long. Leaf-blades 5–20 cm long; 5–9 mm wide.

INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole lanceolate; 0.75–1.5 cm long; herbaceous.

Racemes 1; single; 1–2.25 cm long; bearing few fertile spikelets; bearing 2 fertile spikelets on each. Rhachis fragile at the nodes; subterete. Rhachis internodes columnar; bearing a sterile companion laterally. Rhachis internode tip transverse; crateriform.

Sexes segregated; on bisexual branches; with male above. Spikelets embracing internode; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Male spikelets sessile and pedicelled; 2 in a cluster. Pedicels fused to internode; united wholly.

STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels (and minute vestige).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 4.75–5.2 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; indurate; pallid; 2-keeled; keeled above; keeled laterally; winged on keel; winged above. Lower glume surface not waisted. Lower glume apex obtuse. Upper glume oblong; cartilaginous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 3 -veined. Fertile florets female. Fertile lemma oblong; hyaline; without keel; 1 -veined. Palea hyaline; 0 -veined; without keels.

FLOWER Anthers 3; 4.2–4.5 mm long.

MALE Male spikelets distinct from female; with pedicels fused to rhachis; 2 flowered; lanceolate; 8–9 mm long. Male spikelet glumes 2.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Andropogoneae. Patunkar.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.