Growing on the gravelly to rocky shores of Lake Champlainon bordering the edge of mixed woodlands under the small growth of Alders near Webb's Dock (Chittenden Co., Western Vermont).
Norcia (Italie, prov. Perugia, Umbria), Colle S.Nicola aux environs du Abeto di Preci, alt. 1050m, lieux arides sur sol calcaire, pente à 30%, versant SSW