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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.
Sporobolus lenticularis
HABIT Annual. Culms erect, or geniculately ascending; 20–45 cm long; 3–7 -noded. Lateral branches lacking, or sparse. Leaves mostly basal. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; flat, or involute; 5–13 cm long; 2–3 mm wide. Leaf-blade margins tuberculate-ciliate.
INFLORESCENCE Inflorescence a panicle.
Panicle open; oblong; 6–12 cm long; 3–4 cm wide. Primary panicle branches whorled at most nodes; simple, or sparsely divided.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; subterete; 1.5–1.7 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes deciduous; dissimilar; reaching apex of florets. Lower glume ovate; 0.8–1.1 mm long; 0.5–0.66 length of upper glume; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.5–1.7 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
FLORETS Fertile lemma oblong; 1.5–1.7 mm long; membranous; without keel; 1 -veined. Lemma apex obtuse. Palea 2 -veined. Palea keels approximate.
FLOWER Anthers 3; 0.25–0.3 mm long.
FRUIT Caryopsis with free soft pericarp; ellipsoid, or orbicular; flattened (discoid); exposed between gaping lemma and palea at maturity; 1.5 mm long. Embryo 0.5 length of caryopsis.
DISTRIBUTION Asia-tropical: Papuasia. Australasia: Australia.
NOTES Eragrostideae. Jansen 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.