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 nanunica

HABIT Perennial. Rhizomes elongated; leptomorph. Culms 300–700 cm long; 10–30 mm diam.; woody. Culm-internodes terete; with small lumen; 22–28 cm long; distally glabrous. Culm-nodes flush with internodes, or swollen; glabrous. Lateral branches dendroid; erect, or ascending. Branch complement two, or three; in a clump; with subequal branches, or 1 branch dominant. Culm-sheaths deciduous; coriaceous; glabrous; without auricles; glabrous on shoulders. Culm-sheath ligule 3 mm high; entire. Culm-sheath blade lanceolate; erect, or reflexed. Leaves 4–5 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking. Leaf-sheath auricles absent. Ligule an eciliate membrane; 3 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 13–26 cm long; 25–50 mm wide. Leaf-blade venation with 14–18 secondary veins; with distinct cross veins. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle; comprising 6–8 fertile spikelets.

Panicle open; ovate; 18–25 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 10–25 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 7–9 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 30–70 mm long; 3–5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 6–7 mm long; pubescent.

GLUMES Glumes two; persistent; similar; shorter than spikelet. Lower glume ovate; chartaceous; without keels. Lower glume apex acute. Upper glume lanceolate; chartaceous; without keels. Upper glume apex acute.

FLORETS Fertile lemma ovate; 15–17 mm long; 9 mm wide; chartaceous; without keel; 13–18 -veined. Lemma surface pubescent. Lemma apex acuminate. Palea 12–15 mm long. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2.5–3 mm long; glabrous. Anthers 6; 5–5.5 mm long. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Lin 2002.

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