Fig. 8

Phylogenic tree derived from 74 CDSs. The black spots indicate phylogenetic support values both from maximum likelihood and Bayesian with 100% bootstrap support (BS) and 1.00 posterior probability (PP) respectively. The double slashes indicate an artificial shortening of this branch, as the outgroup, Coffer arabica, produces a very long branch. The terminals are color-coded, with each color a clade in the phylogenic tree corresponding to a section in Ho TN taxonomic treatment, and a picture of species representing its section and/or series. The species displayed are A, S. erythrosticta; B, S. multicaulis; C, S. cordata; D, S. dichotoma; E, S. przewalskii; F. S. verticillifolia; G, S. mussotii; H, S. cincta. Photographs: Gao Qingbo, Ma Xiaolei, Cao Qian, Zhou Yubi, Xu Bo, Yang Fengmao