1. | Panicle (flowering head) contracted and enclosed by upper leaf-sheath at maturity | Puccinellia stricta (Australian Saltmarsh-grass) |
1. | Panicle spreading and becoming free of the upper leaf-sheath at maturity | 2 |
2. | Anthers 1.3-2.1 mm long | Puccinellia ciliata (Puccinellia) |
2. | Anthers 0.5-1.1 mm long | 3 |
3. | Palea keels hairy in the lower half; spikelets congested in a one-sided panicle and most branches with spikelets to the base and not deflexed | Puccinellia fasciculata (Borrer’s Saltmarsh-grass) |
3. | Palea keels hairless in the lower half; spikelets not congested and most branches usually bare of spikelets towards the base and the lower branches deflexed | Puccinellia perlaxa (Lax Saltmarsh-grass) |