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  Society above quoted; at the fame time acknowledging my obligations to the Rev. Mr. Relhan for the following account:—

The Æcidium fuscum is a parasitical fungus, growing on various plants, usually on the under surface of their leaves; but it sometimes grows on their upper surface, and even on the petals of Anemone nemorosa. It does not appear that the essential parts of fructification in the Anemone are injured by its presence on the petals.

Mr. Relhan favoured me with specimens answering to the above account. It grows from under the skin, and is simply composed of a thin coat, containing fuscous feeds.——Whether Dr. Pulteney's plant be really the same species is doubtful, as he describes the powder of a white colour. TAB. LIV. Linn. Sp. Pl. 1650. Huds. 634. With. 435. Bull t. 252 & t. 438. f. 1.

upper surface of this plant in its young state emits a fine powder or farinaceous dust, without any appearance of punctures. In a more advanced state it becomes punctured, and the spots are found on examination to be the mouths of little sphærical cavities, hollowed out of the substance of the fungus. They contain a black dust, probably the feed. TAB. LV. Linn. Sp. Pl. 1652. Huds. 639. With. 456.

Bull t. 180.

on old stumps of trees, posts, railing, &c. all the year round, in one state or other. The summits are at first white; afterwards the stalks are covered towards the top with half-imbedded sphærules, containing black feeds. There is a striking generic affinity between this and the last.