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.

Dendrocalamus jianshuiensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; pendulous at the tip; 1700–1800 cm long; 100–120 mm diam.; woody; without nodal roots, or rooting from lower nodes. Culm-internodes terete; hollow; 25–37 cm long. Lateral branches dendroid. Branch complement many. Culm-sheaths deciduous; 1 length of internode; coriaceous; truncate at apex; auriculate; with 1 mm high auricles; with 5–20 mm wide auricles. Culm-sheath ligule 1–4 mm high; dentate. Culm-sheath blade triangular; reflexed; 10–20 cm long; 35–75 mm wide; pubescent; acuminate. Leaves 9 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 20–30 cm long; 35–85 mm wide. Leaf-blade venation with 18–26 secondary veins. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in globose clusters; 2.2–7.5 cm between clusters; pubescent on internodes; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 6–7 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 10–18 mm long; 5–10 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes several; 1–3 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 5–8 mm long; chartaceous; without keels. Lower glume surface puberulous. Lower glume apex acute; mucronate. Upper glume ovate; 5–8 mm long; chartaceous; without keels. Upper glume surface pubescent. Upper glume apex acute; mucronate.

FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 7–12 mm long; 5–10 mm wide; chartaceous; without keel. Lemma apex acuminate. Palea 6–9 mm long; chartaceous; 2-keeled but the uppermost without keels. Palea apex dentate; 2 -fid.

FLOWER Lodicules absent. Anthers 6; 4–6 mm long; yellow; anther tip apiculate. Filaments 10–14 mm long. Stigmas 1.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Bambuseae. Hsueh & Li 2002.

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