1852. Lyceum of Natural History, New York. Hon. Mem.
1852. Der Naturwissenschaftliche Verein in Hamburg. Hon. Mem.
1853. Philadelphia College of Pharmacy. Hon. Mem.
1853. Polk Co. Agricultural Society, Iowa. Mem.
1854. Kaiserlich Königliche Geologische Reichsanstalt, Vienna. Corresp. Mem.
1854. Société Impériale des Sciences Naturelles de Cherbourg. Corresp. Mem.
1855. Regia Scientiarum Academia Borussica. Corresp. Mem.
1857. California Academy of Natural Sciences. Hon. Mem.
1857. Société de Botanique de Leyden. Corresp. Mem.
1858. Dublin University Zoological and Botanical Association. Corresp. Mem.