1. | Spikelets to 2.9 mm long; nerves of lower lemma with spicules; lower and upper florets subequal | W. subxerophila (NSW QLD) Panicum subxerophilum |
Spikelets at least 3 mm long; nerves of lower lemma smooth; upper floret shorter than lower floret | 2 | |
2. | Upper glumes glabrous and acuminate; leaf blades flat and without pungent tip | W. proluta (NSW SA VIC QLD) Panicum prolutum, Homopholis proluta |
Upper glumes scabrous and acute; leaf blades involute and with pungent tip | W. pungens (NSW) |
Key to Walwhalleya derived from Wills et al. 2000