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.

Acidosasa guangxiensis

HABIT Perennial. Rhizomes short; pachymorph. Culms erect; 200–300 cm long; 10–20 mm diam.; woody. Culm-internodes terete; hollow; 16–18 cm long; distally glabrous, or pilose. Lateral branches dendroid. Branch complement three. Culm-sheaths deciduous; hispid; hairy on margins; auriculate; with 4–5 mm high auricles; with 1 mm wide auricles; setose on shoulders; shoulders with 6–12 mm long hairs. Culm-sheath ligule 2 mm high; ciliolate. Culm-sheath blade lanceolate, or triangular; scabrid. Leaves 4–8 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs setose; spreading; 4–5 mm long. Ligule an eciliate membrane; 2 mm long; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10–16 cm long; 15–23 mm wide. Leaf-blade venation with 8–10 secondary veins. Leaf-blade surface glabrous; hairless except near base. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes, or comprising only a few spikelets.

Racemes 1; single; bearing few fertile spikelets; bearing 3–6 fertile spikelets on each.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 15–30 mm long; glabrous, or pubescent; hairy above.

FERTILE SPIKELETS Spikelets comprising 13–33 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 60–170 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; similar; shorter than spikelet. Lower glume ovate; 8–10 mm long; chartaceous; without keels. Lower glume surface glabrous, or puberulous. Lower glume margins ciliate. Lower glume apex acute. Upper glume ovate; 9–13 mm long; chartaceous; without keels. Upper glume surface glabrous, or puberulous. Upper glume margins ciliate. Upper glume apex acute; mucronate.

FLORETS Fertile lemma ovate; 13–15 mm long; 6–7 mm wide; chartaceous; without keel. Lemma surface pubescent. Lemma margins ciliate. Lemma apex acuminate. Palea 10–12 mm long. Palea keels ciliolate. Palea surface pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2 mm long; ciliate. Anthers (4–)6; 5 mm long. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Dai & Huang 2002.

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