Proceedings of the Botanical Society of the British Isles (1596)
Botanical Society of the British Isles · London · leaf 229
203 VERONICA FILIFORMIS SM. IN THE BRITISH ISLES Fig. 1. Distribution of Veronica filiformis Sm. as an established escape in the British Isles. Outline by courtesy of Messrs. George Philip & Son Ltd.
Internet Archive · Natural History Museum Library, London · Public domain (published before 1931). Free to use for anything.
