. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. CAPSULAR FUNGI—PYRENOMYCETES 211 family except the Valseae, next to be enumerated, whilst a little experience will soon enable him to surmount this temporary difficulty. The subfamily Valseae contains an immense number of species, which are pustular and erumpent. The stroma is formed from the altered matrix. The perithecia are quite distinct, and mostly arranged in a circle, with convergent necks. The principal genus is Valsa, in which the perithecia are collected in mo
. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. CAPSULAR FUNGI—PYRENOMYCETES 211 family except the Valseae, next to be enumerated, whilst a little experience will soon enable him to surmount this temporary difficulty. The subfamily Valseae contains an immense number of species, which are pustular and erumpent. The stroma is formed from the altered matrix. The perithecia are quite distinct, and mostly arranged in a circle, with convergent necks. The principal genus is Valsa, in which the perithecia are collected in more or less definite clusters, immersed in the bark of trees or of their branches and twigs, and either disposed in a simple circle or a circular group, with the necks converging towards the centre, so as to form an erumpent disc, which splits the bark (Fig. 99). The sporidia are hyaline, and either con- tinuous or septate according to the subgenera. The largest number of species have small hyaline sausage - shaped sporidia, which is the typical Valsa. Those in which the sporidia are more than eight in each ascus are either Valsella or Goronophora, as sub- genera. When the sporidia are only eight, the species are again subdivided FlG- 99.—Perithecia of into those in which the ostiolum is sulcate, as JEutypella ; and into those in which the ostiolum is not sul- cate, but the disc is whitish, gray, or yellowish, and then called Leucostoma ; or the ostiolum is not sulcate, and there is no pallid disc, which is Euvalsa, or true Valsa. In two other small sub- genera, with like sporidia, when the perithecia are four in a group, or a small number, it is Quaternaria; and when a larger number, and loosely disposed, or free, then Calosphaeria; and thus the series of the species of Valsa with sausage-shaped sporidia is complete. In a second section with simple hyaline sporidia, these are of some other form than sausage-shaped, as represented by the subgenera Gryptosporella and Gryptqsp
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Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
