Career
Nyman was a curator at the Swedish Museum of Natural History in Stockholm (1855–1889). With Heinrich Wilhelm Schott (1794-1865) and Theodor Kotschy (1813-1866), he was editor of Analecta Botanica (1854). Among his publications are the following:
Conspectus Florae Europaeae, (volume 1- September 1878, volume 2- October 1879, volume 3- July 1881, volume 4- October 1882, addendumDecember 1885).
Sylloge Florae Europaeae, (1854–1855).
The plant genus Nymania (synonym Phyllanthus) was named in his honor by Karl Moritz Schumann. In 1891 Otto Kuntze named the genus Nymanina after him.