Baltic german botanist and plant breeder (1793-1860).
Nicolai Anhorn von Hartwiss (Russian: Николай Андерс фон Гартвис), also known as Nikolai Andreyevich Gatvis (Russian: Николай Андреевич Гартвис; 1793–1860) was a Russian botanist, plant explorer and plant breeder of Baltic German descent. His education at the Imperial University of Dorpat was interrupted by the Napoleonic Wars of 1812–1818 as he served in the Imperial Russian Army. Afterwards he worked on his father's estate, and by 1824, he was living in Riga and had a collection of 500 varieties of fruit trees and roses. He was then appointed to the Russian Imperial Botanical Garden at Niki