| Sessile spikelet 10-11 mm long; robust annuals to 4 m tall | V. macrospermum (NT) Sorghum macrospermum |
| Sessile spikelet 4-6.5 mm long; robust annuals to 1-2 m tall | V. laxiflorum (NT QLD) Sorghum laxiflorum |
Key to Vacoparis derived from Spangler
Taxonomic name: