Dutch botanist (1808-1882).
Johannes Elias Teijsmann (1 June 1808 – 22 June 1882) was a biologist, botanist and plant collector. He was born in Arnhem, The Netherlands. His surname is sometimes spelled Teysmann, although he spelled it Teijsmann. Teijsmann travelled to Java in 1830 as gardener of Governor General Johannes van den Bosch. He was appointed the director - hortulanus - of the Lands Plantentuin in Buitenzorg (now Bogor) the following year, a post he held until 1869. He took part in important botanical expeditions throughout maritime Southeast Asia. Teijsmann was also part of a Dutch fact-finding mission to Siam