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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.
Isachne leersioides
HABIT Annual. Culms rambling; 100–200 cm long. Lateral branches ample. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs. Ligule a ciliate membrane; 1 mm long. Leaf-blades 5–15 cm long; 0.5–4 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins cartilaginous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; oblong, or ovate; 5–15 cm long; 3–7 cm wide. Primary panicle branches ascending, or spreading; 1 -nate; rebranched below middle. Panicle branches stiff.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–3 mm long.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1 mm long; breaking up at maturity; disarticulating above glumes but not between florets.
GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.9 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface hispidulous. Lower glume apex acute. Upper glume ovate; 0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface hispidulous. Upper glume apex acute.
FLORETS Fertile lemma orbicular; 1 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
FLOWER Anthers 3.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION South America: Caribbean.
NOTES Isachneae. N Amer Fl 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.