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; accessed 02/04/2020