London: B. and J. White 1794. vi, 72, [2-ads] pages plus 38 leaves of plates. Complete. Disbound, 8vo. 5 1/2 x 8 3/4 inches. Early drab paper spine over marbled boards, now disbound with spine mostly perished and boards separated from the textblock. Plates are finely engraved copper plates, hand colored. The book is organized as explanations opposite each plate, with one or two pages of explanatory text. While the text is often foxed and browned and most of the plates have offset to the text pages, the plates themselves are quite nice. Sold with all faults for the plates. Fair. Disbound. 
Martyn was Regius Professor of Botany in the University of Cambridge. Interestingly, while the title page is dated 1794, the front flyleaf has a 1797 watermark.