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Urochloa panicoides Beauv.
(=Panicum helopus Trin.)
Family: Poaceae, Tribe: Paniceae
Common names: liverseed grass
Disseminule: Spikelet; disarticulation below glumes.
Spikelets of 1 fertile floret and 1 basal sterile lemma; spikelet elliptic, strongly dorsally compressed, plano-convex, apex acute; 2.5-5.5 mm long, 1.8-2.25 mm wide. Glumes membranous, dissimilar; lower glume ca. one third as long as spikelet, 3-5-nerved, upper glume as long as spikelet, 7-13-nerved. Sterile lemma similar to upper glume, but 5-7-nerved. Fertile lemma elliptic, indurate, surface with numerous, low transverse ridges, apex obtuse and awned, awn 0.3-1 mm long, not extending beyond tip of spikelet; lemma margins inrolled, enclosing palea.
Urochloa ramosa (L.) R.D. Webster
Urochloa texana (Buckley) R.D. Webster
Africa: Botswana, Eritrea, Ethiopia, Kenya, Malawi, Mauritius, Mozambique, Namibia, Somalia, South Africa, Sudan, Swaziland, Tanzania, Uganda, Zambia, Zimbabwe; Asia: Yemen, India, Pakistan, Thailand; Australia; Argentina; United States.
Native to southern Africa.
Woodlands, shrublands, damp places; a weed of lawns, roadsides, rotation crops, pastures.
Urochloa panicoides is a tufted annual grass, to 100 cm tall. In Australia, it grows in tropical-subtropical sub-humid woodlands to semi-arid shrub woodlands. It is reported to cause nitrate poisoning in livestock.