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.

Ancistrachne ancylotricha

HABIT Perennial. Culms rambling; 100–150 cm long; 2.5–3 mm diam.; wiry. Culm-internodes distally glabrous. Lateral branches sparse. Leaf-sheaths smooth; glabrous on surface; inner surface glabrous. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades reflexed; deciduous at the ligule; 1–13.5 cm long; 2.5–7 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 7.5–17.5 cm long. Primary panicle branches ascending; simple; 2–4 cm long. Panicle axis glabrous.

Spikelets in pairs. Fertile spikelets sessile and pedicelled. Pedicels 2–4 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; tilted on the pedicel; dorsally compressed; 3.75 mm long; falling entire. Spikelet callus attached transversely.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5–0.6 length of spikelet; chartaceous; without keels; 3 -veined. Lower glume surface pilose; hairy above; with tubercle-based hairs, or hooked hairs. Lower glume apex acute. Upper glume ovate; 3.75 mm long; 1 length of spikelet; chartaceous; with hyaline margins; without keels; 9 -veined. Upper glume surface pilose; with tubercle-based hairs, or hooked hairs. Upper glume apex obtuse.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; coriaceous; much thinner on margins; 7–9 -veined; pilose; with tubercle-based hairs, or hooked hairs; obtuse. Fertile lemma elliptic; 3.5 mm long; cartilaginous; much thinner on margins; without keel. Lemma surface punctate. Lemma margins flat. Lemma apex acute; laterally pinched.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Paniceae. Blake 2000.

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