Oxalis sect. Palmatifoliae, de Candolle, 1824

López, Alicia, Panseri, Andrea F. & Urtubey, Estrella, 2013, Revision of Oxalis section Palmatifoliae DC. (Oxalidaceae), Phytotaxa 138 (1), pp. 1-14 : 6

Key to the species of Oxalis sect. Palmatifoliae

1. Rhizome vertical, hollow, covered exclusively by protective scales (“pseudobulb”). Cymes 1- or sometimes 2-flow- ered ........................................................................................................................................................ O. adenophylla

- Rhizome horizontal, solid, covered by nutritious scales, sometimes also by protective scales. Cymes 1-flowered ... 2

2. Protective scales densely or loosely covering the rhizomes ................................................................... O. enneaphylla

- Protective scales absent ............................................................................................................................................... 3

3. Leaflets linear .............................................................................................................................................. O. laciniata

- Leaflets not linear ........................................................................................................................................................ 4

4. Leaflets obcordate, with smooth margin. Plants glabrescent ...................................................................... O. loricata

- Leaflets square-shaped with wavy margins. Plants pubescent .................................................................. O. morronei