The genus Leptochloa P. Beauv. (Poaceae) is represented by nine species in Australia (Sharp and Simon 2002). Three of these include subspecies, bringing the total number of taxa in Australia to fourteen. I report here the first confirmed occurrence in Western Australia of Leptochloa panicea (Retz.) Ohwi subsp. brachiata (Steud.) N. Snow, a non-native taxon of neotropical origin.