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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 villosa
HABIT Perennial. Rootstock evident. Butt sheaths woolly. Culms 30–60 cm long. Leaf-sheaths pilose; with tubercle-based hairs. Ligule an eciliate membrane. Leaf-blades flat, or involute, or convolute; 20–45 cm long; 2–5 mm wide. Leaf-blade surface glabrous, or pilose; with tubercle-based hairs. Leaf-blade apex acuminate; filiform.
INFLORESCENCE Inflorescence a panicle; bearing juvenile spikelets at emergence. Peduncle glabrous, or pubescent above.
Panicle contracted; linear; 2–18 cm long; contracted about primary branches. Primary panicle branches 1–2.5 cm long. Panicle axis scabrous; pubescent. Panicle branches pilose.
Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels glabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse.
GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic; 5–6 mm long; 0.8–0.9 length of upper glume; membranous; 1-keeled; 3–5 -veined. Lower glume surface pilose; with tubercle-based hairs. Lower glume hairs 2.5 mm long. Lower glume apex acuminate. Upper glume elliptic; 2.5 length of adjacent fertile lemma; 1 length of spikelet; membranous; 1-keeled; 5–7 -veined. Upper glume surface pilose; with tubercle-based hairs. Upper glume apex acuminate.
FLORETS Basal sterile florets male, or barren; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; elliptic; 5 mm long; membranous; 1-keeled; 5 -veined; acute. Fertile lemma oblong; 2.5 mm long; coriaceous; without keel; 3 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma margins involute; interlocking with palea keels. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6 mm long overall; with twisted column. Column of lemma awn 2.5 mm long. Palea with auriculate flaps; coriaceous; 2 -veined. Palea surface asperulous.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 1–2 mm long. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-tropical: India.
NOTES Arundinelleae. Bor 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
