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.

Aulonemia cochabambensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 100–120 cm long; 4 mm diam.; woody. Culm-internodes terete; with small lumen; antrorsely scabrous; distally glabrous. Culm-nodes with distinct supra-nodal ridge. Lateral branches dendroid. Bud complement 1. Branch complement one; solitary. Leaf-sheaths striately veined; glabrous on surface. Leaf-sheath oral hairs ciliate; 2–4 mm long. Ligule a ciliolate membrane; 0.2–0.3 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2–0.3 cm long; petiole glabrous. Leaf-blades linear, or lanceolate; 10–13 cm long; 10–14 mm wide; dark green and glaucous; discolorous with last colour beneath. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; comprising 3–7 fertile spikelets; without bracts, or bracteate at branch bases. Peduncle 7–12 cm long.

Panicle open; ovate; effuse; 10–13 cm long; 5–7 cm wide. Panicle branches capillary; puberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 20–30 mm long; puberulous.

FERTILE SPIKELETS Spikelets comprising 5–6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 30–55 mm long; 3–4.5 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 3 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate; 7–10 mm long; membranous; 3 -veined. Lower glume surface puberulous. Lower glume margins ciliate. Lower glume apex awned; 1 -awned. Lower glume awn 3–5 mm long. Upper glume lanceolate; 12–16 mm long; membranous; without keels; 7–11 -veined. Upper glume surface puberulous. Upper glume margins ciliate. Upper glume awned; 1 -awned. Upper glume awn 4–7 mm long.

FLORETS Fertile lemma lanceolate; 18–21 mm long; chartaceous; without keel; 7–9(–11) -veined. Lemma surface puberulous; hairy below. Lemma apex awned; 1 -awned. Principal lemma awn 5–9 mm long overall. Palea 10–15 mm long; 4 -veined; 2-keeled. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2 mm long.

DISTRIBUTION South America: western South America.

NOTES Bambuseae. Judz. & Clark 2012.

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