. Endothia parasitica and related species . rom mycelium) is the sum total of that part of thevegetative portion of the fungus body, which, without serving ex-clusively for absorption, takes part in the formation of the fruitbody. He sets aside Fuistings (36, p. 185) division of the fungusbody into an epistroma and a hypostroma, as essentially nothing butthe distinction of conidial layers and perithecial stroma. Ruhland divides the fungus body into an ectostroma and an ento-stroma. The ectostroma grows on the upper surface of the paren-chyma of the bark, between it and the periderm, and is com

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. Endothia parasitica and related species . rom mycelium) is the sum total of that part of thevegetative portion of the fungus body, which, without serving ex-clusively for absorption, takes part in the formation of the fruitbody. He sets aside Fuistings (36, p. 185) division of the fungusbody into an epistroma and a hypostroma, as essentially nothing butthe distinction of conidial layers and perithecial stroma. Ruhland divides the fungus body into an ectostroma and an ento-stroma. The ectostroma grows on the upper surface of the paren-chyma of the bark, between it and the periderm, and is composed ofv generally wide-lumened plectenchyma which does not possess thepower of absorption. This portion has the following functions: The formation of the conidia, the opening and breaking off of theperiderm, and the stimulation of the development of the entostroma.The entostroma, on the other hand, according to Ruhland, lives inthe parenchyma of the bark, and while young is in a high degree Bui. 380, U. S. Dept. of Agriculture. Plate IX.. ~ & 1