Fig. 1.

Preferred most-parsimonious tree of representatives of four of the five sections of Platanthera recognized by Hapeman and Inoue (1997: listed to the right), together with the former genera Piperia (Bateman et al., 2003) and Diphylax, plus the two genera that constitute the revised Galearis group; the two Pseudorchis species constitute the outgroup. Branch lengths are proportional to Acctran optimization and include autapomorphies; figures on internal branches indicate bootstrap support and (in parentheses) decay index values. The four arrows indicate nodes that collapse in the strict consensus tree.