(en) M.E. Kotyk, J.F. Basinger, P.G. Gensel et T.A. de Freitas, « Morphologically complex plant macrofossils from the Late Silurian of Arctic Canada », American Journal of Botany, vol. 89, no 6, , p. 1004–1013 (PMID21665700, DOI10.3732/ajb.89.6.1004).
(en) M.E. Kotyk, J.F. Basinger, P.G. Gensel et T.A. de Freitas, « Morphologically complex plant macrofossils from the Late Silurian of Arctic Canada », American Journal of Botany, vol. 89, no 6, , p. 1004–1013 (PMID21665700, DOI10.3732/ajb.89.6.1004).
(en) Shougang Hao et Jinzhuang Xue, The early Devonian Posongchong flora of Yunnan: a contribution to an understanding of the evolution and early diversification of vascular plants, Beijing, Science Press, (ISBN978-7-03-036616-0, lire en ligne), p. 329.