GrassBase - The Online World Grass Flora

Descriptions

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

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

Sinobambusa

HABIT Perennial. Rhizomes absent (1), or elongated (13); leptomorph (13/13). Culms erect (13/13); 50–398.1–1000 cm long; woody; without nodal roots (6/6). Culm-internodes terete (7/12), or channelled (5/12). Culm-nodes swollen (8/8). Lateral branches dendroid. Branch complement one (1/12), or two (1/12), or three (11/12); in a horizontal line (9/9); with subequal branches (5/8), or 1 branch dominant (3/8); thinner than stem (5/5). Culm-sheaths persistent (1/7), or tardily deciduous (1/7), or deciduous but leaving a persistent girdle (1/7), or deciduous (5/7); without auricles (4/11), or auriculate (7/11). Culm-sheath blade linear (2/11), or lanceolate (11/11), or triangular (1/11); narrower than sheath (1/1). Leaf-sheath auricles absent (9), or falcate (5). Ligule an eciliate membrane, or a ciliolate membrane (1). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate (13), or oblong (3); herbaceous (9), or chartaceous (5). Leaf-blade venation without cross veins (3), or with obscure cross veins (2), or with distinct cross veins (9).

INFLORESCENCE Synflorescence bractiferous (6/6); paniculate (1/6), or fasciculate (5/6); with glumaceous subtending bracts (6/6); with axillary buds at base of spikelet (6/6).

Fertile spikelets sessile (5/6), or pedicelled (1/6).

FERTILE SPIKELETS Spikelets comprising 4 fertile florets (1/6), or 5–6 fertile florets (2/6), or 7 fertile florets (3/6), or 8–12 fertile florets (5/6), or 13 fertile florets (4/6), or 14–20 fertile florets (3/6), or 21–25 fertile florets (1/6), or 40 fertile florets (1/6); with diminished florets at the apex (6/6). Spikelets linear (6/6); laterally compressed (6/6); 30–66.89–108 mm long; breaking up at maturity (6/6); disarticulating below each fertile floret (6/6). Rhachilla internodes definite (6/6); glabrous (4/6), or sparsely hairy (1/6), or pilose (1/6).

GLUMES Glumes one the lower absent or obscure (1/6), or two (3/6), or several (2/6); persistent (6/6); shorter than spikelet (6/6). Lower glume oblong (2/3), or ovate (2/3); 0.7–0.85–1 length of upper glume; chartaceous (1/1); without keels (1/2), or 1-keeled (1/2); 9 -veined (1/2), or 11–13 -veined (1/2). Lower glume surface without pits (5/5). Lower glume apex acute (2/2). Upper glume lanceolate (1/3), or oblong (1/3), or ovate (1/3); 0.5–0.6–0.7 length of adjacent fertile lemma; chartaceous (2/2); without keels (2/3), or 1-keeled (1/3); 9 -veined (1/2), or 11–13 -veined (1/2). Upper glume lateral veins with cross-veins (1/1). Upper glume apex acute (3/3).

FLORETS Fertile lemma lanceolate (1/6), or ovate (5/6); chartaceous (6/6); without keel (6/6); wingless (6/6); 9 -veined (1/4), or 11–14 -veined (1/4), or 15 -veined (3/4), or 16–17 -veined (1/4). Lemma lateral veins obscure (1/2), or prominent (1/2). Lemma surface unwrinkled (6/6); without grooves (6/6). Lemma margins eciliate (5/6), or ciliate (1/6). Lemma apex obtuse (2/6), or acute (4/6), or acuminate (1/6); muticous (5/6), or mucronate (1/6). Palea embraced by lemma (5/6), or inturned at apex (1/6); 0.9 length of lemma; membranous (1/6), or chartaceous (5/6); 9 -veined (1/2), or 11 -veined (1/2). Palea keels ciliolate (2/6), or ciliate (4/6). Apical sterile florets resembling fertile though underdeveloped (6/6).

FLOWER Lodicules 3 (6/6); glabrous (2/6), or ciliate (4/6). Anthers 3 (5/6), or 6 (1/6). Stigmas 2 (1/6), or 3 (5/6). Ovary glabrous (5/5).

FRUIT Caryopsis with adherent pericarp (6/6); ellipsoid (1/1).

DISTRIBUTION Temperate Asia (11), or Tropical Asia (3).

Please cite this publication as detailed in How to Cite Version: 27th January 2014.