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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Lasiacis ligulata
HABIT Perennial; caespitose. Culms rambling, or scandent; straight; 100–500 cm long; 6–13 mm diam.; woody. Culm-internodes hollow; distally glabrous, or with pubescent line. Culm-nodes glabrous. Leaf-sheaths glabrous on surface to pubescent; outer margin hairy. Ligule a ciliolate membrane, or a ciliate membrane; 2–3 mm long; brown; glabrous on abaxial surface, or pubescent on abaxial surface. Collar concolorous. Leaf-blade base asymmetrical. Leaf-blades lanceolate; (5–)7–14(–17) cm long; (6–)10–22(–34) mm wide. Leaf-blade surface smooth; glabrous, or puberulous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle.
Panicle open; ovate; 2–17 cm long. Primary panicle branches spreading, or reflexed; 1–8 cm long. Panicle branches smooth, or scaberulous; glabrous in axils.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; tilted on the pedicel; dorsally compressed; 3–4 mm long; falling entire.
GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma; shiny. Lower glume oblate; 1.7–2 mm long; 0.5–0.6 length of spikelet; membranous; black; without keels; 7–11 -veined. Lower glume surface woolly; hairy at apex. Lower glume apex obtuse. Upper glume ovate; 1 length of adjacent fertile lemma; membranous; black; without keels; 9–11 -veined. Upper glume surface woolly; hairy at apex. 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; membranous; 9–11 -veined; woolly; hairy at apex; obtuse. Palea of lower sterile floret 0.75–1 length of lemma. Fertile lemma ovate; dorsally compressed; 2.8–3.5 mm long; indurate; dark brown; shiny; without keel. Lemma margins involute. Lemma apex obtuse; with a shallow excavation and woolly. Palea indurate. Palea apex pubescent.
FLOWER Anthers 3; 1.6–2.1 mm long.
FRUIT Caryopsis with adherent pericarp; 1.8–2.1 mm long.
DISTRIBUTION South America: Caribbean, northern South America, western South America, and Brazil.
NOTES Paniceae. Davidse.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
