Æcidium Berberidis, Pers. Berberry Cluster-Cups; spots roundish, bright red; subiculum thickened; peridia in subrotund or oval patches, often elongated; spores orange.—On leaves, peduncles, and fruit of the common Berberry. Common. May to July. ([Plate I.] figs. 7-9.)
Æcidium Thalictri, Grev. Meadow-Rue Cluster-Cups; collected in roundish clusters; peridia oblong; spores bright orange.—On Thalictrum alpinum. Not uncommon in Scotland.
Æcidium crassum, Pers. Buckthorn Cluster-Cups; spots yellow-brown, subiculum thickened; peridia crowded into a roundish heap, at first globose, yellow, at length open; spores orange.—On Rhamnus catharticus and R. frangula. Common.
Æcidium Periclymeni, DC. Honeysuckle Cluster-Cups; spots variegated, yellow and brown, subiculum thickened; peridia sometimes elongated, in roundish or effused heaps; spores orange.—On the under surface of Honeysuckle leaves. Not common. June to August.
β. Poculiformæ.
Æcidium Calthæ. Grev. Marsh-Marigold Cluster-Cups; aggregate; peridia somewhat campanulate, with numerous minute marginal teeth; spores bright orange, subglobose or oval.—On leaves and petioles of Caltha palustris. Margin of peridia pale and brittle. Rare. Spring.
Æcidium Ranunculacearum, DC. Crowfoot Cluster-Cups; spots obliterated, subiculum thickened; peridia in irregular heaps, densely crowded together; spores orange.—On leaves of various Ranunculaceæ; very common on R. Ficaria, not uncommon on R. repens, more rarely on R. acris and R. bulbosus. Spring. ([Plate II.] figs. 12-14.)
Æcidium Galii, Pers. Bedstraw Cluster-Cups; spots linear or oblong, obscurely brown; peridia scattered, rarely aggregate, dentate, whitish; spores white.—On the leaves of Galium verum and G. mollugo. ([Plate II.] figs. 15-17.)
I am doubtful whether the Æcidium on Galium mollugo is really this species.—(M. C. C.)
Æcidium Bunii, DC. Pig-nut Cluster-Cups; spots obliterated, subiculum thickened; peridia in irregular subrotund or oval heaps; spores orange.—On Bunium bulbocastanum and Pimpinella saxifraga. Spring.