Key to the genus Huttonaea Harv.
| 1a | Lower leaf with a long petiole; flowers to 10 mm in diameter | Huttonaea fimbriata |
| 1b | Lower leaf sessile; flowers 10-30 mm in diameter | 2 |
| 2a | Petal claws free from each other; inflorescence usually with more than 5 flowers | 3 |
| 2b | Petal claws united, at least in lower half; inflorescence with 1-5 flowers | 4 |
| 3a | Lower leaf 60-120 mm long; forest plants | Huttonaea pulchra |
| 3b | Lower leaf 40-60 mm long; grassland plants | Huttonaea woodii |
| 4a | Flowers less than 18 mm in overall height; petal fringes 24 mm long, petal claws fused in basal part | Huttonaea oreophila |
| 4b | Flowers 20-30 mm in overall height; petal fringes 5-8 mm long, petal claws completely fused | Huttonaea grandiflora |
World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 02/04/2020
