We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleFormer diversity of Ephedra (Gnetales): evidence from Early Cretaceous seeds from Portugal and North America.AuthorsRydin C; Pedersen KR; Crane PR; Friis EMPublicationAnnals of botany, 2006, Vol 98, Issue 1, p123ISSN0305-7364Publication typearticleDOI10.1093/aob/mcl078