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.

Indocalamus latifolius

HABIT Perennial; caespitose. Rhizomes elongated; leptomorph. Culms erect; 100 cm long; 5 mm diam.; woody. Culm-internodes terete; distally pubescent. Lateral branches suffrutescent; erect, or ascending. Branch complement one, or two, or three. Leaves cauline; 1–3 per branch. Leaf-sheaths glabrous on surface, or pilose; outer margin glabrous, or hairy. Ligule a ciliate membrane; 1.5–4 mm long. Leaf-blade base cuneate, or broadly rounded; with a brief petiole-like connection to sheath; petiole 0.3–0.8 cm long. Leaf-blades lanceolate, or oblong; 10–30 cm long; 15–47 mm wide. Leaf-blade venation with 12–24 secondary veins; with distinct cross veins. Leaf-blade surface glabrous, or pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle, or composed of racemes; without bracts, or bracteate at branch bases; embraced at base by subtending leaf.

Panicle open; elliptic; 6–12 cm long. Primary panicle branches appressed. Panicle axis pubescent.

Racemes 1; bearing 4–5 fertile spikelets on each.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–9 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 25–40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 4–5 mm long; pubescent. Floret callus pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5–7 mm long; chartaceous; without keels; 5–7 -veined. Lower glume lateral veins obscure. Lower glume surface puberulous. Upper glume lanceolate; 8–10 mm long; chartaceous; without keels; 7–9 -veined. Upper glume surface puberulous.

FLORETS Fertile lemma ovate; 13–15 mm long; chartaceous; without keel; 11–13 -veined. Lemma lateral veins with cross-veins. Lemma surface glabrous, or puberulous. Palea 5–7 mm long; chartaceous. Palea surface puberulous; hairy on back. Palea apex ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 1 mm long. Anthers 3; 4–5 mm long; purple. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Keng 1996.

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