1. Glumes 3-lobed A. debilis (WA)
    Glumes entire 2
2. Lemma with central lobe much more strongly developed

A. setaceus (WA)

Diplopogon setaceus

   Lemma with equal or subequal lobes 3
   3. Callus 1.5-3 mm long  4
     Callus less than 1.5 mm long  5
  4.  Lemmas 11-12 mm long A. avenaceus (WA)
     Lemmas c.16 mm long A. turbinatus (WA)
  5. Lemma does not extend into bristles A. amphipogonoides (WA)
    Lemma lobes extended into bristles 6
  6. Glumes tapering into fine points 7
    Glumes obtuse or narrowed into short acute lobes 8
  7. Spikelets 7-18 mm long including awns; leaves soft  A. laguroides var. laguroides (WA)
   Spikelets c.25 mm long including awns; leaves stiff         A. laguroides var. havelii(WA)
  8. Lemmas uniformly hairy below lobes 9
    Lemmas with two vertical bands of hairs in lower part 10
  9. Bristles ciliate to tips A. sericeus (NT WA QLD)
    Bristles scabrous A. caricinus var. scaber (QLD)
  10.Bristles ciliate to tips A. caricinus var. caricinus (NSW VIC NT SA WA QLD)
    Bristles scabrous A. strictus (NSW WA QLD)

Key to Amphipogon derived from Vickery 1950, Macfarlane 2005

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