Morphological features and main trends of calyx evolution in the genus Sal- via (Lamiaceae)
The specificity of calyx structure in the genus Salvia is described and analyzed. In the context of taxonomy, distribution, ecology and dissemination, the calyx morphology in the various lineages of Salvia is characterized. The main trends of calyx transformation are the following: the reduction of all teeth of the upper lip, the reduction and approximation of teeth of the upper lip, the reduction only of the central tooth of the upper lip. Similarity of calyx morphology between East-Asiatic and American species of Salvia is shown. The different calyces expanded in fruit are the most specialized types which terminate all evolutional series.