Oplismenus

1. Length/width ratio of leaf blades less than 7 2
Length/width ratio of leaf blades greater than 10 4


2. Basal racemes more than 4 cm long O. compositus (NT QLD)
Basal racemes less then 2 cm long 3


3. Spikelet 3.5-4 mm long; awns smooth, viscous  O. aemulus (NSW VIC QLD)
O. aemulus var. lasiorhachis, O. hirtellus auct.
Spikelet 2-2.5 mm long; awns scaberulous, not viscous O. burmannii (NT QLD)


4. Racemes in distinct clusters; leaf blade
indumentum dense
O. mollis (NSW QLD)
Racemes not in distinct clusters; leaf
blade indumentum sparse
O. imbecillis (NSW VIC NT WA QLD)
O. hirtellus subsp. imbecillis, O. undulatifolous var. imbecillis

Key to Oplismenus derived from Vickery 1975; Scholz 1981; Simon 2010

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