Note Z — IX.

We have before us an Æcidium on leaves of Berberis vulgaris, collected at Berne by Shuttleworth in 1833. It is named by him Æcidium graveolens, and differs in the following particulars from Æcidium berberidis. The peridia are scattered as in Æ. Epilobii, and not collected in clusters. They are not so much elongated. The cells are larger, and the orange spores nearly twice the diameter. There is a decided, strong, but unpleasant odour in the fresh plant; hence the name. The above figures (figs. 107, 108) of the cells and spores of both species are drawn by camera lucida to the same scale—380 diameters.