Aulonemia dinirensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms 40–80 cm long; 3–4 mm diam.; woody. Culm-internodes terete; with small lumen; distally pruinose. Culm-nodes without obvious supra-nodal ridge. Lateral branches dendroid. Bud complement 1. Branch complement one. Leaves 4–5 per branch. Leaf-sheaths without keel; striately veined; glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 0.4–0.6 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.1–0.2 cm long; petiole glabrous. Leaf-blades reflexed; deciduous at the ligule; lanceolate; 7–10 cm long; 10–23 mm wide. Leaf-blade surface puberulous; hairy on both sides. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 20–25 cm long; 8–10 cm wide. Panicle branches capillary; smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 8–10 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25–35 mm long; 1.5–2.7 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 2–2.5 mm long; membranous; without keels; 1–3 -veined. Lower glume lateral veins absent, or distinct. Lower glume apex acute. Upper glume lanceolate; 5–5.7 mm long; membranous; 3–5 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 8–10 mm long; chartaceous; without keel; 7–9 -veined. Lemma surface puberulous. Lemma apex apiculate; mucronate. Palea 6.5–7.5 mm long; 2 -veined.

FLOWER Anthers 3; 3 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: northern South America.

NOTES Bambuseae. Judz. & Riina 2006.

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