James (Jacobus) J. Dickson (1738–1822) was a Scottish nurseryman, plant collector, botanist and mycologist. Between 1785 and 1801 he published his Fasciculus plantarum cryptogamicarum Britanniae, a four-volume work in which he published over 400 species of algae and fungi that occur in the British Isles He is also the author of Collection of Dried Plants, Named on the Authority of the Linnaean Herbarium and Other Original Collections. The plant genus Dicksonia is named after him.
^Jacobi Dickson Fasciculus (-fasciculus quartus) plantarum Cryptogamicarum Britanniæ. MS. notes. 4 fasc. pl. XII. Prostant venales apud auctorem; G. Nicol: Londini, 1785-1801. 4º. (2 copies in the British Library)