1. Raceme 1-2 jointed 2
Racemes 3-many jointed 7

2. Awn to 7mm long or absent 3
Awn to 17mm long 4

3. Tufted plant with setaceous leaf blades C. setifolius (NT WA QLD)
Creeping plant with flat or folded leaf blades C. aciculatus (NT QLD)

4. Callus 4-6mm long C. pallidus (NT WA QLD)
Callus 1.5-3.5mm long 5

5. Leaf-blades 1-2cm wide C. latifolius (NT WA)
Leaf-blades much less than 1cm wide 6

6. Lower leaf-sheaths not flabellate, breaking
up into fibres; racemes mostly 1-jointed
C. fallax (NSW NT SA WA QLD)
Lower leaf-sheaths flattened, not breaking
up into fibres; racemes mostly 2-jointed
C. sylvaticus (NSW QLD)

7. Sessile spikelets awnless *C. zizanioides (QLD)
Sessile spikelets awned 8

8. Sessile spikelets more than 8mm long,
callus more than 2.5mm long
Sessile spikelets less than 7.5mm long,
callus less than 2mm long

9. Inflorescence branches weak and filiform;
racemes 3.5-9cm long
C. filipes (NSW NT QLD)
Vetiveria filipes, V. intermedia
Inflorescence branches rather rigid;
racemes 1.5-4cm long
C. rigidus (QLD)
Vetiveria rigida

10. Callus hairs 0.75-1.5mm long, ± fulvous;
racemes 2-3-jointed
C. oliganthus (NT WA QLD)
Vetiveria pauciflora
Callus hairs 2-3mm long, whitish; racemes
C. elongatus (NT QLD)
Vetiveria elongata

Key to Chrysopogon is derived from Blake 1944b, Veldkamp 1999

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