[1] Moscow MV Lomonosov State Univ, Biol Fac, Dept Higher Plants, Moscow, Russia
[2] Tomsk State Univ, Lab Herbarium TK, Tomsk, Russia
[3] Cornell Univ, Sch Integrat Plant Sci & LH Bailey Hortorium, Sect Plant Biol, Ithaca, NY USA
[4] Russian Acad Sci, Lab Trop Plants, Tsitsin Main Bot Garden, Moscow, Russia
[5] Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
[6] Chinese Acad Sci, CAS Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China