| 1A. Phyllodes with 2 non-prominent longitudinal veins per face (1 when flat) | 21. A. calamifolia |
| 1B. Phyllodes with more than 2 prominent longitudinal veins per face | 2 |
| 2A. Phyllodes reticulate between major longitudinal veins | 3 |
| 2B. Phyllodes not reticulate between major longitudinal veins | 23. A. harpophylla |
| 3A. Phyllodes with inconspicuous secondary veins; racemes 2-headed | 22. A. cyclops |
| 3B. Phyllodes with conspicuous secondary veins; racemes 3–5-headed | 24. A. melanoxylon |
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