1. Plants glabrous S. longifolius (NT WA QLD)
Plants silky-hairy to some degree 2

2. Leaf-blades hairy below, glabrous
above, green
S. x alterniflorus (WA)
Leaf-blades densely hairy on both sides, grey-green 3

3. Culm internode 9-18 mm thick; leaf-blade 9-17 mm wide S. hirsutus (SA WA)
Culm internode 4-8 mm thick; leaf-blade 5-10 mm wide S. sericeus (NSW VIC TAS SA QLD)

Key to Spinifex derived from Craig 1984; Webster 1987; Heyligers

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