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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 ligulata
HABIT Perennial. Culms rambling; 60–200 cm long; rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades lanceolate; 10–15 cm long; 6–12 mm wide. Leaf-blade margins cartilaginous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle.
Panicle open; ovate; dense; 6–8 cm long; with spikelets clustered towards branch tips. Primary panicle branches profusely divided.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets oblong, or orbicular; dorsally compressed; obtuse; 1.7–2 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 ovate; 0.66 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex obtuse. Upper glume ovate; 0.75 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex obtuse.
FLORETS Fertile florets with the lowest dissimilar. Lowest fertile lemma bisexual; elliptic; 1.7–2 mm long; thinner than adjacent lemma. Fertile lemma orbicular; 1.4–1.7 mm long; indurate; without keel. Lemma margins involute. Lemma apex obtuse. Palea indurate; 2 -veined.
FLOWER Anthers 3.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION South America: northern South America and western South America.
NOTES Isachneae. WDC 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.