=Uredo Circææ=, A. & S. NIGHTSHADE UREDO; sori minute, crowded, subrotund, slightly confluent, on the under surface; spores irregular, ovate, small, ochraceous.—On leaves of _Circæa lutetiana_. June, July. Common. (Plate VII. figs. 135, 136.) =Uredo bifrons=, Grev. TWIN-FACED UREDO. On both surfaces of the leaves, often opposite, scattered, round, light brown, girt with the remains of the epidermis; spores globose.—On Sorrel leaves (_Rumex acetosa_ and _R. acetosella_). July, September. Common. (Plate VII. figs. 137-139) LECYTHEA, _Lév._ _Stroma_ surrounded or sprinkled with elongated abortive spores. _Spores_ free, invested with their mother-cell, or concatenate.—_Berk. Outl._, p. 334. * _Spores free._ =Lecythea Ruborum=, Lév. BRAMBLE RUST. Spots pale, brown or purple on the opposite side, sometimes depressed above; sori subrotund, aggregate; epidermis soon bursting; spores globose or subglobose, echinulate, bright ochraceous-yellow.—On the under surface of Bramble leaves. July and August. Very common. (Plate II. fig. 40.) =Lecythea Rosæ=, Lév. ROSE RUST; spots yellow, small, scattered; spores sub-oval, sometimes minutely pedicellate, orange.—On Rose-leaves. July, September. Extremely common. (Plate II. fig. 37.) =Lecythea Poterii=, Lév. BURNET RUST; spots obliterated, rufous on the opposite side; sori subrotund, scattered, minute on the under surface; epidermis bursting; spores subglobose, often pedicellate, intense orange; barren spores pale, cylindrical, and slightly curved.—On _Poterium Sanguisorba_. Summer. Common. (Plate III. fig. 31.) =Lecythea Populina=, Lév. POPLAR RUST; hypogenous; sori yellow, roundish or oblong, surrounded by the ruptured epidermis; spores copious, elongated or ovate.—On Poplar and Birch leaves. Summer. Common. =Lecythea Euphorbiæ=, Lév. SPURGE RUST; spots obliterated; sori subrotund, small, scattered, surrounded by the ruptured epidermis; barren spores pyriform or subglobose, pedicellate; fertile spores subglobose, orange.—On the under surface of the leaves of various species of _Euphorbia_, especially _E. helioscopia_ and _E. peplus_. August. Very common. =Lecythea epitea=, Lév. TAWNY WILLOW RUST; sori roundish, scattered, at first tawny, at length growing pale, surrounded by the ruptured epidermis; spores subrotund and pyriform.—On the under surface of Willow-leaves. =Lecythea mixta=, Lév. ORANGE WILLOW RUST; spots yellow; sori subrotund, aggregate, confluent, effuse, permanently surrounded by the ruptured epidermis; spores oblong and pyriform, orange.—On both surfaces of the leaves of Willows. =Lecythea Saliceti=, Lév. COMMON WILLOW RUST; spots yellowish; sori subrotund, solitary, or in circles, surrounded by the ruptured epidermis; barren spores subglobose and pedicellate or pyriform; fertile spores subglobose, orange.—On the under surface of Willow-leaves. Autumn. Common.