GrassBase - The Online World Grass Flora


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

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

Arundinella tricholepis

HABIT Perennial; culms solitary. Rhizomes short; scaly. Culms erect; 115–120 cm long; 2–3 mm diam.; 5–6 -noded; without nodal roots, or rooting from lower nodes. Culm-internodes distally glabrous. Culm-nodes pubescent. Leaf-sheaths hispid; with tubercle-based hairs; outer margin hairy. Ligule a ciliolate membrane; scarious; truncate. Leaf-blades linear, or lanceolate; 20–40 cm long; 8–15 mm wide; herbaceous, or coriaceous. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs.

INFLORESCENCE Inflorescence a panicle. Peduncle glabrous.

Panicle open; linear, or oblong; 42 cm long; 3–5 cm wide. Primary panicle branches ascending; 7 cm long. Panicle axis scaberulous. Panicle branches angular.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 3.9–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; obtuse. Floret callus hairs 0.5 mm long.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 2.5–3.2 mm long; 0.75 length of upper glume; membranous; 1-keeled; 5 -veined. Lower glume primary vein scabrous. Lower glume surface pilose; with tubercle-based hairs. Lower glume apex acuminate. Upper glume ovate; 3.9–4 mm long; membranous; 1-keeled; 5–7 -veined. Upper glume primary vein scabrous. Upper glume surface pilose; with tubercle-based hairs. Upper glume apex acute.

FLORETS Basal sterile florets male; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; ovate; 2.5–3.2 mm long; chartaceous; 1-keeled; 5 -veined; acute. Palea of lower sterile floret 2.2 mm long. Fertile lemma ovate; 2–2.2 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma margins involute; interlocking with palea keels. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 2.7–2.9 mm long overall; with twisted column. Column of lemma awn 0.9 mm long. Palea coriaceous; 2 -veined. Palea surface asperulous.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 1.3 mm long; purple. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinelleae. Sun & Hu 1996.

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