1. | Inflorescence readily disarticulating at maturity | 2 |
Inflorescence not disarticulating at maturity | 4 | |
2. | Racemes ±exserted from floral sheaths | I. macratherum (NT WA QLD) |
Racemes enclosed within floral sheaths | 3 | |
3. | Involucral spikelets present in lowest racemes | I. vaginiflorum (NSW NT SA WA QLD) |
Involucral spikelets absent | I. fragile (NT SA QLD) | |
4. | Involucral spikelets 4-6.5 mm long | 5 |
Involucral spikelets 3-4 mm long | 10 | |
5. | Sessile spikelets glabrous at base | I. calvum (NT QLD) |
Sessile spikelets hairy at base | 6 | |
6. | Lower glume of involucral spikelet ciliate on keels | I. ciliatum (NT WA QLD) |
Lower glume of involucral spikelet minutely scabrid on keels | 7 | |
7. | Inflorescence sparse; peduncles very long and slender | I. holmesii (WA) |
Inflorescence ±dense; peduncles short | 8 | |
8. | Floral sheaths not glandular on keel; involucral spikelets 4-5 mm long | I. convexum (NT QLD) |
Floral sheaths glandular on keel; involucral spikelets 5-6.5 mm long | 9 | |
9. | Hairs of raceme base 2-3 mm long | I. windersii (NT QLD) |
Hairs of raceme base c. 4.5 mm long | I. trichopus (NT WA) | |
10. | Pedicels of involucral spikelets bearded throughout | I. dolichotrichum (NT WA QLD) |
Pedicels of involucral spikelets bearded only at base | 11 | |
11. | Raceme base with hairs to 1.5 mm long or glabrous | I. membranaceum (NSW NT SA WA QLD) |
Raceme base with hairs 2-5 mm long | I. eremaeum (NT SA WA QLD) |
Key to Iseilema derived from Hubbard 1935c; Blake 1938
Taxonomic name: