A revision of Old World species of Setaria (Poaceae: Panicoideae: Paniceae).

MORRONE, O.; ALISCIONI, S. S.; PENSIERO, J; J. VELDKAMP; F.O. ZULOAGA; KELLOGG, E.A

Systematocs Botany Monogrphs

ASPT

Año: 2013 vol. 96 p. 1 - 53

0737-8211

Setaria (Poaceae: Panicoideae: Paniceae) in the Old World is revised, providing identificationtools for a group that includes many important forage grasses and several widespread weeds. Setaria includes annualand perennial species of open and dry places, with membranous-ciliate ligules, lanceolate to filiform leaves,lax to spiciform inflorescences, and solitary or paired spikelets subtended by one to several setae. The spikelets inSetaria are obovoid to long-ellipsoid, glabrous, with the lower glume usually one-half the length of the spikelet orshorter, the upper glume and lower lemma subequal, the lower palea as long as the upper anthecium to reduced orabsent, the lower floret absent or present and then staminate, and the upper anthecium indurate and smooth totransversely rugose. Base chromosome number in the genus is x = 9. A key to all 66 Setaria species occurring inthe Old World is presented, followed by morphological descriptions, synonymy, typifications, distribution maps,notes, and illustrations of selected species. Two new combinations are proposed: Setaria desertorum (A. Richard)Morrone and Setaria obtusifolia (Delile) Morrone.