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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 tuberculata
HABIT Annual. Culms erect; 40–80 cm long. Culm-nodes bearded. Lateral branches lacking. Leaf-sheaths pilose; with tubercle-based hairs. Ligule a ciliolate membrane. Leaf-blades oblong; 6–12 cm long; 6–11 mm wide. Leaf-blade surface scaberulous; hispid; hairy on both sides; with tubercle-based hairs. Leaf-blade margins tuberculate-ciliate. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle; bearing juvenile spikelets at emergence.
Panicle open; linear, or lanceolate; dense, or loose; 7–14 cm long; 1–3 cm wide. Panicle axis scabrous. Panicle branches scabrous.
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; 8–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded; obtuse.
GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume ovate; 5 mm long; 0.5–0.6 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface scabrous; rough on veins; pilose; hairy on veins; with tubercle-based hairs. Lower glume apex setaceously attenuate. Upper glume lanceolate; 3–3.5 length of adjacent fertile lemma; 1 length of spikelet; membranous; 1-keeled; 5 -veined. Upper glume surface pilose; hairy on veins; 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; 4.5 mm long; membranous; 1-keeled; 3 -veined; acute. Fertile lemma elliptic, or 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; 3 -awned. Principal lemma awn from a sinus; geniculate; 9 mm long overall; with twisted column. Column of lemma awn 4.5 mm long. Lateral lemma awns arising on apex of lobes; 1 mm long. Palea with auriculate flaps; coriaceous; 2 -veined. Palea surface asperulous.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 2–3 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.
