. Fig. 102.—Sphaerella lancina. Section throngli a diseased spot on a larch needle. The interior of the leaf is permeated with the intercellular mycelium. Two conidial cushions are shown ; from these numerous long rod-shaped conidia are given off externally (those of the upper cushion have nearly all been carried oflf by rain), while cavities inside the cushions are filled with micro-conidia. X ^^. (After R. Hartig.) appear. Their distribution and germination are facilitated by wet weather. The perithecia (Fig. 104) are matured towards

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897