@ARTICLE{TreeBASE2Ref14944, author = {B. L. Carr and Jorge V. Crisci and P. C. Hoch}, title = {A cladistic analysis of the genus Gaura (Onagraceae).}, year = {1990}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {Systematic Botany}, volume = {15}, number = {}, pages = {454--461}, abstract = {Gaura, a genus of 21 species in North America, forms a monophyletic group within tribe Onagreae. Compared to the outgroup (Calylophus), it is clearly defined by three synapomorphies: indehiscent fruits, four-lobed stigmas, and fruits with fewer than 10 seeds. A cladistic analysis of the genus was performed using 20 characters from floral morphology, fruit morphology, and plant habit and growth characteristics. Polarity of the characters was based on the outgroup comparison method. Two most parsimonious cladograms, with only a single minor topological difference, were generated, with 29 steps and a consistency index of 0.72. A Nelson consensus tree was constructed, which has the same length as the two cladograms, and an identical topology to one of them. The consensus cladogram defines 12 monophyletic groups. This cladogram supports most of the current infrageneric classification of Gaura, except that sects. Xerogaura and Gaura appear to be paraphyletic groups. The placement of G. lindheimeri within sect. Gaura in keeping with the current classification depends on interpreting two habit characters in this species as being secondarily derived.} }

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