Swedish lichenologist and botanist.
Gustav Torssell (born 28 April 1811 in Tynnelsö – died 5 February 1849 in Uppsala) was a Swedish printer, publisher, and naturalist who worked in Uppsala and Falun. He made contributions to both lichenology and journalism during his relatively short life. Torssell is known for his work on lichens, publishing Enumeratio Lichenum et Byssacerum Scandinaviae ("Enumeration of lichens and Byssaceae of Scandinavia") (1843), a systematic catalogue of Scandinavian lichens. In 1845, responding to the crop failure and resulting famine of 1844, he published Anvisning till nödbrödsämnen–om användandet af l