Dykes, William Rickatson
The genus Iris. With forty-seven coloured drawings by F.H. Round, one coloured plate of seeds by miss R.M. Cardew and thirty line drawings by C.W. Johnson.
(Cambridge, 1913), New York, Dover, 1974, pp. [vi], 245, text-illustrations and 48 colour-plates, small folio, cloth, dust-jacket.
Reprint in slightly (20%) reduced format.
* Cf. Nissen 574; Stafleu & Cowan TL2/32.314.