Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 48o DISEASES OF CULTIVATED PLANTS Appel and Laubert, Ber. Deutsch. Bot. Ges., 23, p. 218. Clinton, State of Conn. Exp. St. Rep. (1907-8). Frank, Ber. Deutsch. Bot. Ges., 16, p. 280. Harz, Eijiige A'ei/e Hyphoniyceten, p. 129, pi. 31 (1871). Johnson, Ecofiom. Proc. Roy. Soc. Dublin., i, p. 161 (1903). Massee, Kew Bull., Jan. 1909. EXOSPORIUM (Link.) 1 Stroma compact, convex or with the centre depressed; spores elongated, many-septate, coloured. This genus is closely allied to Cor
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 48o DISEASES OF CULTIVATED PLANTS Appel and Laubert, Ber. Deutsch. Bot. Ges., 23, p. 218. Clinton, State of Conn. Exp. St. Rep. (1907-8). Frank, Ber. Deutsch. Bot. Ges., 16, p. 280. Harz, Eijiige A'ei/e Hyphoniyceten, p. 129, pi. 31 (1871). Johnson, Ecofiom. Proc. Roy. Soc. Dublin., i, p. 161 (1903). Massee, Kew Bull., Jan. 1909. EXOSPORIUM (Link.) 1 Stroma compact, convex or with the centre depressed; spores elongated, many-septate, coloured. This genus is closely allied to Coryneum, if indeed there is any real difference between the two. Larch branch fungus {Exosporium laricinum, Massee) occurs on living branches of the larch, and although directly of no economic importance, yet indirectly it is sometimes the cause of serious injury, in that the cracking of the bark, and subsequent oozing out of sap and resin, enables the spores of Fig. âExosporium laricinum. i, fungus on pine *â ; 2, fruit of fungus ; 3, sections of same ; 4, conidia. I Figs. 2-4 mng. 1 the canker fungus {Da\yscyp/ui) to gain an entrance into the tissues, and subsequently form a canker wound. The fungus occurs under tlie form of minute, black dots in crowded clusters on the bark of young shoots. Stroma more or less circular, often depressed in the centre, and resembling
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