American Journal of Botany American Journal of Botany, Botanical Society of America, 2011, 98 (1), pp.E13-E15. ⟨10.3732/ajb.1000371⟩ American Journal of Botany, Botanical Society of America, 2011, 98 (1), pp.e13-e15. ⟨10.3732/ajb.1000371⟩ American Journal of Botany, 2011, 98 (1), pp.e13-e15. ⟨10.3732/ajb.1000371⟩