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.

Chimonocalamus dumosus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 150–300 cm long; 5–15 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete; hollow, or with small lumen; 10–16 cm long. Culm-nodes glabrous. Lateral branches dendroid. Culm-sheaths deciduous; chartaceous; pilose; with tawny hairs; convex at apex; without auricles. Culm-sheath ligule 1.5 mm high; dentate. Culm-sheath blade linear; 4–11 cm long; 4–5 mm wide; pubescent. Leaves 3–7 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 5–10 mm long. Leaf-sheath auricles absent. Ligule an eciliate membrane; 4–5 mm long; pubescent on abaxial surface; obtuse. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear, or lanceolate; 3–16 cm long; 3–12 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 8–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 4–5 mm long; pilose.

GLUMES Glumes two; persistent; similar; shorter than spikelet; similar to fertile lemma in texture.

FLORETS Fertile lemma lanceolate; 8–10 mm long; chartaceous; without keel. Lemma surface pubescent. Palea 1–1.1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ovate; membranous. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; 3.5–8.5 mm long; light brown; glabrous.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Fl China 2006.

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