1. Anthers rusty brown; ligules 3-5 mm ong
P. longior (SA WA)
Anthers creamy white or if brownish then ligules less than 3 mm long

2. Palea keels almost completely glabrous
P. sp. (Swan Reach)  (SA)
Palea keels scabrous

3. Panicle branches spreading, mostly bare in lower part
Panicle branches mostly contacted, with spikelets evenly distributed on branches

4. Anthers 0.5-11 mm long
Anthers 1.2 mm long

5. Palea keels hairy in lower half
P. fasciculata (VIC SA)
Palea keels glabrous in lower half 6

6. Upper glume 2-3 mm long; lemma tip tapering
P. perlaxa (NSW VIC SA TAS)
Upper glume 1.2-2 mm long; lemma tip tapering P. distans   (NSW SA TAS)

7. Lower glume more than half the length of upper glume
P. ciliata   (NSW VIC SA WA)
Lower glume about half the length of upper glume P. gigantea   (WA)

8. Upper glume 4.2-8 mm long
  P. harcusiana   (TAS)
Upper glume 1.5-4 mm long 9

9. Spikletets crowded toward base of panicle branches
P. vassica   (WA)
Spikletets evenly distributed along panicle branches 10

10. Culs erect
 P. stricta  (VIC SA TAS WA)
Culms decumbent

P. decumbens   (SA)

Key to Puccinellia derived from Walsh 1991 + P. decumbens,  P. gigantea, P. harcusiana sp. Busselton, sp.
Warren Rd,
sp. Swan Reach  fide APC

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