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.

Lasiacis anomala

HABIT Perennial; caespitose. Culms scandent, or erect; 400–500 cm long; 3–9 mm diam.; woody. Culm-internodes hollow; distally glabrous. Culm-nodes glabrous. Leaf-sheaths pubescent, or hirsute; outer margin hairy. Ligule an eciliate membrane; 0.3–0.8(–1.8) mm long. Leaf-blade base asymmetrical. Leaf-blades elliptic, or oblong; (2.5–)5–12(–15) cm long; 8–30(–40) mm wide. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade margins scabrous. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 2–15 cm long. Primary panicle branches ascending, or spreading, or reflexed; 1–4 cm long. Panicle branches scabrous; pubescent; glabrous in axils, or pubescent in axils.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; (2.8–)3.1–3.5(–3.8) mm long; falling entire.

GLUMES Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; gibbous; 1.2–1.8 mm long; 0.33–0.5 length of spikelet; membranous; pallid, or black (at maturity); without keels; 7 -veined. Lower glume apex acute. Upper glume orbicular; (2–)2.3–2.7 mm long; 0.75 length of spikelet; cartilaginous; pallid, or black (at maturity); without keels; 9 -veined. Upper glume apex obtuse.

FLORETS Basal sterile florets similar; barren (lower), or barren (upper); without significant palea. Lemma of lower sterile floret similar to upper glume; orbicular; 1 length of spikelet; cartilaginous; 9 -veined; obtuse. Fertile lemma orbicular; dorsally compressed; 2.6–2.9 mm long; indurate; dark brown, or black; shiny; without keel. Lemma margins involute. Lemma apex obtuse; with a shallow excavation and woolly. Palea indurate.

FLOWER Anthers 3; 1.6–1.7 mm long.

FRUIT Caryopsis with adherent pericarp; 2–2.1 mm long; dark brown.

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.