Lois de la nomenclature botanique rédigées et commentées par M. Alph. de Candolle. Texte préparé sur la demande da Comité d'organisation du Congrès international de botanique de Paris, du 16 août 1867, pour servir de base aux discussions sur les points controversés en nomenclature.

This was the first system of botanical nomenclature adopted by an international governing body. Digital facsimile from Biodiversity Heritage Library at this link.

Translated into English as Laws of botanical nomenclature adopted by the International Botanical Congress, held at Paris in August 1867; together with an historical introduction and a commentary. London: L. Reeve & Co., 1868. Digital facsimile of the English translation from Biodiversity Heritage Library at this link.