ABSTRACT
Themeda australis (R. Br.) Stapf is a highly variable perennial grass of the Andropogoneae with as wide a distribution as any species within Australia. It extends from Papua New Guinea to Tasmania, from latitudes 6 to 43°S, from the east to the west coast, from subhumid to arid regions, and from tropical coasts to subalpine areas (Figure 1). It has not been widely used in experimental work, but it illustrates that a single species may encompass virtually all types of response to daylength. In this respect it is unsurpassed by any species, not even by Bouteloua curtipendula, 8 , 11 and this chapter focuses on the adaptive range of its reproductive behavior.
