Dissanthelium longiligulatum

HABIT Perennial. Rhizomes elongated. Culms geniculately ascending, or decumbent; 12–15 cm long. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 2–6 mm long. Leaf-blades flat, or conduplicate; 5–7 cm long; 3–4 mm wide; stiff. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle; shorter than basal leaves.

Panicle spiciform; linear, or oblong; 5 cm long; 1–1.3 cm wide. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 6–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.4–0.5 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume apex acuminate. Upper glume lanceolate; 6–6.5 mm long; 1.5–1.6 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 3.8–4 mm long; chartaceous; keeled; 3 -veined. Lemma surface scaberulous. Lemma apex acute.

FLOWER Anthers 3; 0.6–0.7 mm long. Ovary glabrous.

FRUIT Endosperm farinose.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Swallen.

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