Maximum parsimony strict consensus topologies from separate nrITS (88 sequences from 76 individuals, 760 sites, 30% pars. informative) and plastid (71 accessions, 2867 sites, <8% informative) datasets. Bolded species names indicate distylous individuals. Parsimony bootstrap scores are above branches and Bayesian posterior probabilities are below. Incongruence occurs in the placement of O. rosea, and in the order of divergence in the Andean lineages.

Magdalena Vaio’s recent poster on the phylogenetic relationships and cytogenetic characteristics of the creeping Oxalis, sections Ripariae and Corniculatae. She has discovered that these species split into two main clades, one with a base chromosome number (x) of 6, and the other with 5 (fig. 2), apparently derived from the ancestral condition of 6 and of much larger size (fig. 1).

Oxalis conorrhiza (Mattos 14874). Super hairy, and with a nice storage structure.

The characteristic ‘beaked’ fruits of Oxalis niederleinii (Souza et al. 46, at SPF).

In the left corner, Oxalis tenerrima, a feisty buster from section Corniculatae!

To the right, the hairy giant from section Ripariae, Oxalis bifrons!

Oxalis serpens 3597, Parana Brazil. A short in a trimorphic population.

Knuth.