[Z]

“Proceedings of the Agri. Hort. Soc. of India” (1871), p. 85.

[a]

“Gardener’s Chronicle” (1852), p. 643, with fig.

[]

Berkeley, “On the Potato Murrain,” in “Jour. Hort. Soc.” vol. i. (1846), p. 9.

[c]

De Bary, “Die gegenwartig herrschende Kartoffelkrankheit.”

[d]

De Bary, “Memoir on Peronospora,” in “Annales des Sci. Nat.”