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.

Apocopis peguensis

HABIT Perennial. Culms 50–90 cm long. Lateral branches ample. Leaf-sheaths keeled; pilose; with tubercle-based hairs. Ligule an eciliate membrane; 1.5 mm long; pubescent on abaxial surface; lacerate. Leaf-blades 10–20 cm long; 4–8 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface scabrous; pubescent; densely hairy; hairy on both sides; with tubercle-based hairs. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous.

Racemes 2; paired; 4–7 cm long. Rhachis fragile at the nodes; subterete; ciliate on margins. Rhachis hairs tawny; 4–5 mm long. Rhachis internodes cuneate; 1.5 mm long.

Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels adnate at the base to lower glume of sessile spikelet; linear; 2 mm long; ciliate; with tawny hairs; with 4–5 mm long hairs.

STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 7.25 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; attached transversely.

GLUMES Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume oblong; 6–7 mm long; 0.9 length of spikelet; coriaceous; dark brown; without keels; 7 -veined. Lower glume primary vein falling short of apex. Lower glume lateral veins all falling short of apex. Lower glume margins ciliate. Lower glume hairs 2–4 mm long. Lower glume apex truncate. Upper glume oblong; 1 length of spikelet; chartaceous; with hyaline margins; 3 -veined. Upper glume primary vein scabrous. Upper glume apex truncate.

FLORETS Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret oblong; 5.5 mm long; hyaline; 1 -veined; without lateral veins; ciliate on margins; truncate. Fertile florets bisexual, or female. Fertile lemma linear; 7 mm long; membranous; much thinner on margins; without keel; 1 -veined. Lemma margins ciliate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 30 mm long overall; with twisted column. Column of lemma awn hispidulous. Palea hyaline; 0 -veined; without keels.

FLOWER Lodicules absent. Anthers 2; 3 mm long.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Andropogoneae. Bor 1992.

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