The gardener's magazine and register of rural & domestic improvement (1826)
Loudon, J. C. (John Claudius), 1783-1843, A. & R. Spottiswoode, printer, United States. Patent Office. Scientific Library, former owner DSI · London : Longman, Rees, Orme, Brown and Green · leaf 310
13 ft. high, 3^ in. diam. … The trpe drawn to a Brale of 1 in. to 4 ft.; and the botanical specimen! to a scale of 2 in. to 1 ft., withtlie exception ot the parts marked +, which are of the natural size; and of those marked ma<;.,which are magnified ; /represents the female flowers, and jn the male flowers. Ashridge Park.…