Æcidium Valerianacearum, Dub. Valerian Cluster-Cups; hypogenous, rarely cauline, spots on a thickened subcircular or oblong base; peridia scattered, more or less crowded, cup-shaped, tawny, margin erect, denticulate; spores dirty-yellow.—On Valeriana officinalis and V. dioica. North Britain.
Æcidium Asperifolii, Pers. Borage Cluster-Cups; clusters subrotund, on a slightly thickened subiculum; peridia scattered; spores yellowish-white.—On leaves of various Boragineæ. Summer. The parts of the leaves on which it occurs are rendered concave on one side and convex on the other.
Æcidium Grossulariæ, DC. Gooseberry Cluster-Cups; spots yellow, bright red on the opposite side, with a yellow border; peridia crowded in roundish heaps, at length brown, and surrounded with a brown area; spores orange.—On leaves and fruit of Gooseberry and Currant. Common. May to June.
Æcidium Urticæ, DC. Nettle Cluster-Cups; spots obliterated, subiculum thickened; peridia disposed in elongated or subrotund heaps, at first subglobose, then gaping; spores orange.—On leaves and stems of Nettles, distorting them very much. Common. June. ([Plate I.] figs. 10, 11.)
Æcidium Behenis, DC. Bladder-Campion Cluster-Cups; spots yellow, brown on opposite side; peridia somewhat circinating, in subrotund heaps; spores brown.—On Silene inflata. Not common. Some of the peridia are short and open, others larger and closed.
Æcidium Orobi, DC. Bitter-Vetch Cluster-Cups; spots yellow, effused; peridia scattered and disposed in small heaps; spores at length white.—On stems and leaves of Orobus tuberosus. Scotland.
γ. Subimmersæ.
Æcidium Compositarum, Mart. Composite Cluster-Cups; spots purplish, subrotund, confluent above; peridia crowded, in orbicular patches, or circinating, on the under surface; spores orange, oval.
Var. a. Taraxaci, Grev.; clusters small, scattered.—On leaves of the Dandelion. June to July.
Var. b. Prenanthis, Pers.; spots circular or irregular, purplish; subiculum incrassated.—On leaves of Hawkweed (Hieracium paludosum). Summer.