| 1. Plant generally << 15 cm, decumbent-branched from base; corolla 47 mm, beak hooked, pouches ± 1 mm deep |
| T. pusilla |
| 1' Plant generally > 15 cm, ± ascending-branched; corolla 825 mm, beak not hooked, pouches generally 1.54 mm deep |
| |
| 2. Stamens exserted; pouch depth > 1.5 × length |
| T. floribunda |
| 2' Stamens ± included; pouch depth < 1.5 × length |
| |
| 3. Plant green- or yellow-brown, generally glabrous; corolla yellow or white, beak yellowish |
| T. versicolor |
| subsp. faucibarbata |
| subsp. versicolor |
| 3' Plant purplish, generally puberulent; corolla sulphur-yellow or white to rose, beak dark purple |
| |
| 5. Corolla 815 mm, ± = bract, pouches 12 mm deep |
| T. micrantha |
| 5' Corolla 1025 mm, > bract, pouches 34 mm deep |
| T. eriantha |
| subsp. eriantha |
| 6' Corolla white, becoming rose-pink |
| subsp. rosea
|