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 yunnanicus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; pendulous at the tip; 1800–2500 cm long; 110–180 mm diam.; woody; without nodal roots, or rooting from lower nodes. Culm-internodes terete; hollow; 42–52 cm long. Lateral branches dendroid. Branch complement many. Culm-sheaths deciduous; 34–38 cm long; coriaceous; hispid; with tawny hairs; without auricles; glabrous on shoulders, or ciliate on shoulders. Culm-sheath ligule 5–8 mm high; dentate. Culm-sheath blade ovate; reflexed; 9–18 cm long; 30–90 mm wide; hispid; acuminate. Leaves 7–10 per branch. Leaf-sheaths pilose. Leaf-sheath auricles absent. Ligule an eciliate membrane; 1.5–2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 25–35 cm long; 45–65 mm wide. Leaf-blade venation with 18–22 secondary veins. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in globose clusters; 1.5–3.5 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 5–7 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 10–16 mm long; 5–7 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes two; persistent; similar; shorter than spikelet. Lower glume ovate; 2–4 mm long; chartaceous; without keels; 12 -veined. Lower glume surface pubescent. Lower glume apex acute; mucronate. Upper glume ovate; 2–4 mm long; chartaceous; without keels; 12 -veined. Upper glume surface pubescent. Upper glume apex acute; mucronate.

FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 5–9 mm long; 5–8 mm wide; chartaceous; without keel; 16–20 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2–4 mm long overall. Palea 4–8 mm long; chartaceous; 2-keeled but the uppermost without keels.

FLOWER Lodicules absent. Anthers 6; 3–4 mm long; yellow; anther tip apiculate. Filaments 10 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.