[1] Foin, Busch and Kuznetsov later wrote 'Flora Caucasica critica' (Materially dlia flory Kavkaza : kriticheskoe sistematichesko-geograficheskoe izsliedovanie),[2] which was published between 1901 and 1913.

It was written as a special supplement to the journal 'Trudy Sankt-Peterburgskogo obshchestva estestvoispytatelei', v. 31, pt.

[3] This published several new species of plant including, Arabidopsis pumila,[4] In 1902 he became a botanist at the Tbilisi Botanical Gardens.

[1][5] Between 1907 and 1919, he wrote 'Kavkaza i Kryma' (Flora of the European part of Russia, An illustrated key to the wild plants of European part of Russia and Crimea) with Yury Nikolaevich Voronov, about plant species in the Caucasus.

[1][8] Between 1914 and 1935, he served as director of the Saint Vladimir University Botanical Garden, Kiev, Ukraine.

During the severe winter of 1919–1920, he and his team saved many green-house plant collections from the frost.

Tulipa schmidtii[5][14] Although, he has collaborated on some publications with Alexander Alfonsovich Grossheim on many articles.