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Descriptions

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

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

Drepanostachyum falcatum

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 200–350 cm long; 7–15 mm diam.; woody. Culm-internodes terete; 15–30 cm long. Culm-nodes swollen. Lateral branches dendroid. Branch complement three, or several; in an irregular line; with subequal branches. Culm-sheaths 1 length of internode. Culm-sheath ligule 6–12 mm high. Culm-sheath blade linear; reflexed; 1.2–5 cm long; acute. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.25 cm long. Leaf-blades deciduous at the ligule; lanceolate; 7.5–10 cm long; 5–8 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous, or pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex attenuate; filiform.

INFLORESCENCE Inflorescence a panicle, or composed of racemes; terminal and axillary.

Panicle contracted; linear; 4–10 cm long. Primary panicle branches indistinct the panicle almost racemose.

Racemes 1; single; 4–10 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 12–18 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume ovate; 8 mm long; 0.8 length of upper glume; herbaceous; without keels; 3–5 -veined. Lower glume apex acuminate. Upper glume elliptic; 10 mm long; 0.75 length of adjacent fertile lemma; herbaceous; without keels; 7–9 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 12 mm long; herbaceous; without keel; 7–9 -veined. Lemma surface scabrous; pubescent; hairy above. Lemma apex acute; mucronate. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ovate; membranous; ciliate. Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform; 12 mm long; apex unappendaged. Hilum linear.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Arundinarieae. Fl Pak 1993.

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