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Descriptions

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

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

Yushania pantlingii

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 15–20 mm diam.; woody. Culm-internodes terete; hollow; 18–20 cm long. Culm-nodes pubescent. Lateral branches dendroid. Culm-sheaths 25 cm long; smooth; hairy on margins; convex at apex; setose on shoulders. Culm-sheath ligule ciliolate. Culm-sheath blade linear; erect; 7–10 cm long; glabrous on surface. Leaf-sheaths striately veined; outer margin hairy. Leaf-sheath oral hairs setose. Ligule an eciliate membrane; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.5–0.7 cm long. Leaf-blades deciduous at the ligule; lanceolate, or oblong; 12–18 cm long; 15–20 mm wide. Leaf-blade midrib evident. Leaf-blade venation with 8–10 secondary veins; with distinct cross veins. Leaf-blade surface scabrous; rough abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; terminal and axillary.

Panicle open; 10–15 cm long. Panicle branches capillary; flexuous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 6–10 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes clavate; 7–8 mm long; eventually visible between lemmas; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume ovate; 5 mm long; herbaceous; without keels; 3–5 -veined. Lower glume margins ciliolate. Lower glume apex attenuate; mucronate. Upper glume ovate; 10 mm long; herbaceous; without keels; 3–5 -veined. Upper glume margins ciliolate. Upper glume apex acuminate; mucronate.

FLORETS Fertile lemma ovate; 12 mm long; herbaceous; without keel; 7 -veined. Lemma midvein scabrous. Lemma lateral veins prominent. Lemma apex acuminate; mucronate. Palea 1 length of lemma; 5 -veined. Palea keels ciliolate. Palea apex dentate; 2 -fid; with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; membranous; veined; ciliate. Anthers 3. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; oblong.

DISTRIBUTION Asia-tropical: India.

NOTES Arundinarieae. Gamble 1995.

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