Indocalamus wilsonii

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 3 mm diam.; woody. Culm-internodes terete; distally glabrous. Lateral branches suffrutescent. Leaves cauline. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10–13 cm long; 22 mm wide. Leaf-blade venation with 10–12 secondary veins. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins scaberulous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 7 cm long; 7 cm wide.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels flexuous; glabrous.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 20–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 3 mm long; chartaceous; 1-keeled; 5 -veined. Upper glume ovate; 5.5 mm long; chartaceous; 1-keeled; 7 -veined.

FLORETS Fertile lemma ovate; 8 mm long; chartaceous; keeled; 7 -veined. Lemma margins ciliate. Lemma apex obtuse. Palea 7 mm long; chartaceous. Palea keels ciliolate. Palea surface puberulous; hairy on flanks. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ciliate. Anthers 3. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; oblong; 3.3 mm long; light brown; glabrous.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Rendle 2002.

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