. a white coating over the whole leaf-surface of Acer 2ilcUanoides. The conidia are spherical. U. circinata C. et Peck, is found on species of Acer in America. U. salicis L). C. (Britain and America). This species occurs on leaves of the willow, and produces white spots or thick coatings on one or both surfaces. It is also found on leaves of poplar and birch. U. prunastri D. C. on Prmius spinosa (Britain). U. Bivonae Lev. on Ulmus montana ( America). Also other American species. Fkj. 74.— Uiicinula salicis. Perithechim (After Tulasne.) Phyllactinia. The spherical perithecia are flatte
. a white coating over the whole leaf-surface of Acer 2ilcUanoides. The conidia are spherical. U. circinata C. et Peck, is found on species of Acer in America. U. salicis L). C. (Britain and America). This species occurs on leaves of the willow, and produces white spots or thick coatings on one or both surfaces. It is also found on leaves of poplar and birch. U. prunastri D. C. on Prmius spinosa (Britain). U. Bivonae Lev. on Ulmus montana ( America). Also other American species. Fkj. 74.— Uiicinula salicis. Perithechim (After Tulasne.) Phyllactinia. The spherical perithecia are flattened at the poles, and enclose several asci containing two or three oval sulphur-yellow spores. The appendages are sharp-pointed hairs with swollen bases. Phyllactinia sufifulta Kebent. {Fh. guttata Wallr.) produces white spots or coatings on the leaves of many trees, e.;j. beech, hornbeam, ash, birch, hazel, oak, etc. (Britain and America). PERISPORIEAE. The Perisporieae include the following genera Thiclavia, Bime- rosporium, Mafpiusia, Ccphalotheca, Zopfiella, Anixia, Eurotium,
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