The spikelet of Urochloa paucispicata has a typical Paniceae structure and
it constitutes the unit of dispersal; the base of its lower glume is united
to an elongated internode between the lower and the upper glumes, and at m
aturity, it becomes soft and turgid, developing the elaiosome.
Chemical identification of TLC fractions in the elaiosome of Urochloa pauci
spicata showed that it contains triglycerides, free fatty acids and diglyce
rides. Gas chromatography of the fatty acid methyl esters, of each fraction
, showed the presence of palmitic, oleic, linoleic and stearic acids. Palmi
tic, oleic and linoleic acids are significant components of the lipid fract
By field observations we identified three different species of ants (Hymeno
ptera: Formicidae) which removed the spikelets of Urochloa paucispicata and
carried them to their nests: Acromyrmex landolti fracticornis FOREL, Pheid
ole spp. and Ectatomma spp.