1. Spikelets 1.5-3mm long 2
Spikelets less than 1.5mm long 3
2. Glumes glabrous and rounded at apex I. globosa (NSW VIC NT SA WA QLD)
I. australis
Glumes covered with bristles and pointed at apex I. sharpii (QLD)
3. Upper glume hairy; upper lemma glabrous; perennial I. confusa (NT QLD)
Upper glume glabrous; upper lemma hairy; annual *I. minutula (NT WA QLD)
I. miliacea, I. brassii, I.pulchella auct.

Key to Isachne derived from Henty 1969; Webster 1987

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith