partially founded by the Volkswagen Foundation(Az.:I/84638);the National Natural Science Foundation of China(40902006and41172009);the Specialized Research Fund for the Doctoral Program of Higher Education(20095301120003)
Horsetails arose in the Late Devonian,evolved a greater diversity and forming fast growing bamboo-like thickets in the Carboniferous lowland swamp forest ecosystems.However,the diversity of this group drastically decl...