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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.
Arundinella kokutensis
HABIT Annual. Culms erect; slender; 5–80 cm long. Culm-nodes pubescent. Lateral branches lacking. Leaf-sheaths 2–8 cm long; hispid; with tubercle-based hairs; outer margin hairy. Ligule a ciliolate membrane; 0.8–1.3 mm long. Leaf-blades lanceolate, or oblong; (1–)5–30 cm long; (3–)6–13 mm wide. Leaf-blade surface hispid; hairy on both sides; with tubercle-based hairs. Leaf-blade margins smooth, or scaberulous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; elliptic; (3–)10–25 cm long. Primary panicle branches (2–)4–10 cm long. Panicle axis smooth, or scaberulous.
Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels 0.5–6 mm long; glabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; laterally compressed; 3–4 mm long; 0.6–1 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; obtuse. Floret callus hairs 0.3–0.5 mm long.
GLUMES Glumes persistent; dissimilar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate, or ovate; 2–2.5 mm long; 0.66 length of upper glume; membranous; 1-keeled; 3–5 -veined. Lower glume surface smooth, or asperulous; rough above. Lower glume apex acuminate, or attenuate. Upper glume lanceolate, or ovate; 3–3.5(–4) mm long; 2.5–3 length of adjacent fertile lemma; 1 length of spikelet; membranous; 1-keeled; 5 -veined. Upper glume surface glabrous, or hispid; with tubercle-based hairs. Upper glume apex caudate.
FLORETS Basal sterile florets male; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; lanceolate, or ovate; 2–2.5 mm long; 0.66 length of spikelet; membranous; 1-keeled; 5 -veined; acute. Palea of lower sterile floret membranous; 1.5–2 mm long. Fertile lemma oblong, or ovate; 1–1.5 mm long; coriaceous; without keel; 3 -veined. Lemma lateral veins obscure. Lemma margins involute; interlocking with palea keels. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 5–6.5 mm long overall; with twisted column. Palea lanceolate, or ovate; with auriculate flaps; 1.2–1.4 mm long; coriaceous.
FLOWER Anthers 2; 0.3–0.5 mm long; yellow.
FRUIT Caryopsis with adherent pericarp; ellipsoid, or ovoid; 1–1.2 mm long.
DISTRIBUTION Asia-tropical: Indo-China.
NOTES Arundinelleae. Teer. & Sung. 2011.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
