Index plantarum succulentarum in Horto Dyckensi cultarum.Aachen, J.J. Beaufort, 1834. 8vo. Contemporary brown/yellow wrappers.

81, [1 blank] pp.Very rare sixth catalogue of the succulents cultivated by Count Salm in his gardens at Schloss Dyck, including American and South African species. The catalogue contains 10 more pages than the previous one from 1829 and lists a total of some 1500 species.Salm-Reifferscheid-Dyck (1773-1861) started collecting succulents at Schloss Dyck in 1800 after consorting with the leading French botanists in Paris and took lessons in paintings from Redouté after he saw the illustrations Redouté made for Candolle's Plantarum succulentarum historia. The first listing of succulents was a short pamphlet printed in 1809, the next listing was published in 1816 and was followed by a more regular publication of catalogues printed in very small numbers. They acted as "exchange lists with the botanical gardens and private collectors with whom Salm-Dyck exchanged specimens" (Rowley).After his death in 1861 the collections at Schloss Dyck soon started to break-up. The herbarium was the first to go, but his unrivalled succulent collection survived until the First World War. What was left of his magnificent library was auctioned in 1992-1993. "Only then did the extent of the loss become apparent: in addition to Salm-Dyck's manuscripts, notebooks and fine paintings [...] there were several editions of his garden catalogue unrecorded by Pritzel, Stafleu & Cowan and other recognised bibliographies, and unseen by succulentists in the never-ending search for prior publication of names and dates of introduction of new species" (Rowley).Very good copy.l BMC NH, p. 1792; Rowley, "Salm-Dyck's Catalogues", in: Taxon vol. 42, no. 4, pp. 845-851; WorldCat (1 copy); not in Stafleu & Cowan.