Jean Nicolas Collignon (c. 1762–?1788) was a gardener and botanist from the Jardin du Roi who served on the La Pérouse expedition to the South Seas (1785–?1788).
Thouin in his recommendation emphasised that Collignon should not be subordinate to the expedition's botanist, Joseph Hugues Boissieu La Martinière, and so the two were assigned to different ships.
[1] The ships anchored at the fertile Catherine Island off the southern coast of Brazil on 6 November 1785, and after a welcome reception, Collignon took on board orange and lemon trees to join the other live plants he had gathered for the South Seas: he also took on cotton, rice, maize and other staples of the tropics.
[2] The expedition anchored on Easter Island on 9 April 1786 and was able to land goats, ewes and pigs that had been purchased at the port of Concepcion, Chile.
The visit to Monterey marked the beginning of the botanical exploration of the Trans-Mississippi West although the true range of his collections is uncertain.