. Fui. 90.—Ihrpotridiia nigra, a, liy|ihuu weav- ing a granular mycelium on the surface of the needle and forming tuber-like bodies over the stomata ; rod-like haustoria are sunk into the outer walls of the epidermal cells. (After I{. Hartig).

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897