Turnbull, R. (1889). Index of British plants according to the London catalogue, including the synonyms used by the principal authors, an alphabetical list of English names, also references to the illustrations of Syme's English botany, and Bentham's British flora (8th ed.). G. Bell.

Turnbull, Robert. Index of British Plants According to the London Catalogue, Including the Synonyms Used by the Principal Authors, an Alphabetical List of English Names, Also References to the Illustrations of Syme's English Botany, and Bentham's British Flora. 8th ed. G. Bell, 1889.