Jean-Christophe Heyland

[2] He also illustrated the work of Benjamin Delessert, Philip Barker-Webb, Giuseppe Giacinto Moris, Pierre Edmond Boissier and others.

[3] Baptised Jean-Christophe Kumpfler, he went to Geneva in his youth as an apprentice hairdresser to an uncle named Heyland, whose surname he subsequently adopted.

He drew and engraved 5 full-page illustrations, including Impatiens parviflora for de Candolle's Quatrieme Notice sur Les Plantes Rares.

[6] Between 1839 and 1846 he produced the illustrations for volumes 4-5 of Icones selectae plantarum, another of de Candolle's projects in collaboration with Benjamin Delessert (1773-1847).

He carried out several commissions for the Geneva Botanical Garden, and directed the engraving and printing in colour of the 180 plates used for 'Voyage botanique en Espagne'.