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Descriptions

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

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

Indocalamus hunanensis

HABIT Perennial; caespitose. Rhizomes elongated; leptomorph. Culms erect; 110–170 cm long; 4–5 mm diam.; woody. Culm-internodes terete; with small lumen; 15–17 cm long. Culm-nodes glabrous. Lateral branches suffrutescent; erect. Branch complement one. Culm-sheaths persistent; 8–12 cm long; coriaceous; hispid; with tawny hairs, or dark brown hairs; auriculate; ciliate on shoulders. Culm-sheath ligule 0.7 mm high. Culm-sheath blade lanceolate; erect, or reflexed; 1–4 cm long; 1–3 mm wide; glabrous on surface. Leaves cauline; 2–4 per branch. Leaf-sheaths 4.5–6.5 cm long; glabrous on surface. Leaf-sheath oral hairs lacking. Leaf-sheath auricles absent. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath; petiole 0.3–0.7 cm long; petiole glabrous. Leaf-blades lanceolate; 9–17 cm long; 18–31 mm wide; glaucous. Leaf-blade venation with 12–18 secondary veins. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 5–11 cm long. Panicle axis pubescent.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–3 mm long; pubescent.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 10–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus pubescent. Rhachilla internodes 1–1.5 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2–5.5 mm long; chartaceous; without keels; (3–)5(–7) -veined. Lower glume apex acuminate. Upper glume lanceolate; 6–8.5 mm long; chartaceous; without keels; (5–)7 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 7–10 mm long; chartaceous; without keel; 7 -veined. Palea 2.5–4 mm long. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Yi 2002.

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