Æcidium leucospermum, DC. White-spored Cluster-Cups; spots yellowish; peridia scattered, often covering the whole under surface; spores white, ovate.—On both sides of the leaves of the wood-anemone. Common. June. ([Plate I.] figs. 4-6.)
Æcidium quadrifidum, DC. Four-lobed Cluster-Cups; spots brownish; peridia scattered, occupying almost the entire under surface; spores brown, subglobose.—On the under side of leaves of Anemone in gardens. (Lobes at the mouth of the peridium not constantly four.) April to May.
Æcidium albescens, Grev. Moschatel Cluster-Cups; leaf blistered, whitish, scattered; peridia white, split into a few large teeth; spores yellowish-white.—On leaves and petioles of Adoxa moschatellina. Not uncommon. April.
Æcidium Epilobii, DC. Willow-herb Cluster-Cups; spots obliterated; peridia scattered, at length oval, wider above; spores orange, at length brown.—On the under side of leaves of Epilobium montanum, E. hirsutum, and E. palustre, rarely on the upper. Common. June to August.
Æcidium Thesii, Desv. Bastard-toadflax Cluster-Cups; spots obliterated; peridia scattered or biseriate; short, cylindrical, margin irregularly toothed, erect; spores yellowish, then dingy.—On Thesium humifusum. Downs near Winchester. July, 1864. Chipstead, Surrey, Oct. 14, 1864. ([Plate III.] figs. 50, 51.)
Æcidium Soldanellæ, Hornsch. Soldanella Cluster-Cups; spots obliterated; peridia solitary, scattered over the inferior surface; spores orange.—On the under surface of the leaves of Soldanella alpina.
Æcidium Tragopogonis, Pers. Goatsbeard Cluster-Cups; spots obliterated; peridia scattered, torn, wider above; spores orange, at length black.—On stems, leaves, and involucres of common Goatsbeard. Very common. May to June. ([Plate I.] figs. 1-3.)
Æcidium Euphorbiæ, Pers. Spurge Cluster-Cups; spots obliterated, leaf thickened; peridia scattered or crowded, distinct; spores orange.—On the under surface of the leaves of Spurge. Common. May to June.
Sect. II. Peridia in tufts or clusters.
α. Elongatæ.