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 209
No. CLII. for October, contains1096 to 1102.—Z/upinus polyphyllus. {fig. 55.) One of fourteen new-species, mostly perennials, discovered by Mr. David Douglas in the north-west of North America, and which will prove some of the most valuable additions that have been made to our garden collections…