At: American Journal of Botany, 85, 9 By: Crepet W. L., Nixon K. C.
journalAt: Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 1995, 12 By: Czier Z.
journalAt: Torreya, 9, 9 By: Cockerell T. D. A.
journalAt: University of Kansas Science Bulletin, 38, 2, Art. 20 By: Leonard A. B.
journalAt: Proceedings of the United States National Museum, 51, 2154 By: Wherry E. T.
journalAt: Memoirs of the Institute of Field Education, Yokohama National University, 2 By: Ozaki K.
journalAt: Botanical Magazine, 101, 1064 By: Takahashi A., Suzuki M.
journalAt: Palaeobotanist, 1981, 30, 1 By: Awasthi N., Guleria J. S., Lakhanpal R. N.
journalAt: Botanical Journal of the Linnean Society, 86, 3 By: Melville R.
journalAt: Botany, 2017, 95, 1 By: Poinar G. O.