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Descriptions

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

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

Arundinella suniana

HABIT Perennial. Culms 85 cm long; 3 mm diam. Culm-nodes pubescent. Leaf-sheaths smooth; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades 22 cm long; 2.5–3.5 mm wide. Leaf-blade surface scabrous; glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 10 cm long; 2.5 cm wide. Primary panicle branches 3.5 cm long. Panicle axis scabrous. Panicle branches scabrous.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled; 1–2 in the cluster. Pedicels unequal; 0.5–3 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6.8–7.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus obtuse.

GLUMES Glumes persistent; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 6 mm long; 0.8 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface setose; with tubercle-based hairs. Lower glume apex acuminate. Upper glume lanceolate; 7.3 mm long; membranous; 1-keeled; 5 -veined. Upper glume surface setose; 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; 6.5 mm long; membranous; 1-keeled; 3 -veined; obtuse. Fertile lemma elliptic, or oblong; 3.8 mm long; coriaceous; without keel. Lemma surface pubescent; hairy above. Lemma margins involute; interlocking with palea keels. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 6–6.3 mm long overall; with twisted column. Column of lemma awn 2 mm long. Lateral lemma awns arising on apex of lobes; 0.7–0.9 mm long. Palea with auriculate flaps; coriaceous; 2 -veined.

FLOWER Anthers 3; 2.5–2.7 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinelleae. Phillips & Chen 2006.

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