|
1.
2. |
Plants glabrous | 2 |
| Plants silky-hairy to some degree | 3 | |
| Male spikelets c. 10 mm long; leaf blades distinctly pungent | S. littoreus (WA) | |
| Male spikelets 6-8 mm long; leaf blades not pungent | S. longifolius (NT WA QLD) | |
|
3.
4. |
Leaf-blades hairy below, glabrous above |
4 |
| Leaf-blades densely hairy on both sides |
5 | |
| Basal culm internode 6-9 mm thick | S. x alterniflorus (WA) | |
| Basal culm internode 5-6 mm thick | S. longifolius x S. sericeus (WA) |
|
| 5. | Culm internode 9-18mm thick; leaf-blade 9-17 mm wide | S. hirsutus (SA WA) |
| Culm internode 4-8mm thick; leaf-blade 5-10 mm wide | S. sericeus (NSW VIC TAS SA QLD) |
Key to Spinifex derived from Craig 1984; Webster 1987; Heyligers
1988
Taxonomic name: