. The "bluing" and the "red rot" of the western yellow pine, with special reference to the Black Hills Forest Reserve . Mycelium and Fruiting Bodies of Blue and Red-rot- Fungi. 1, Tangential section of bine wood; 2, ci -- I: 3, cross - »f a medullary ray; 4. young perithecium of the blue fungus 0 ratostomella pilifera >: 5, mature perithecia of the --bluefungus; 6r two perithecia of the bine fungus; 7, two asci with spores of the blue fnng s; 8, sof the blue fungus: y. top of beak of perithecium of i the Bpore ma—: lu and 11, median se< - I the red-rot fui ogtis, a. sp. Bui. 36, Bureau o

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. The "bluing" and the "red rot" of the western yellow pine, with special reference to the Black Hills Forest Reserve . Mycelium and Fruiting Bodies of Blue and Red-rot- Fungi. 1, Tangential section of bine wood; 2, ci -- I: 3, cross - »f a medullary ray; 4. young perithecium of the blue fungus 0 ratostomella pilifera >: 5, mature perithecia of the --bluefungus; 6r two perithecia of the bine fungus; 7, two asci with spores of the blue fnng s; 8, sof the blue fungus: y. top of beak of perithecium of i the Bpore ma—: lu and 11, median se< - I the red-rot fui ogtis, a. sp. Bui. 36, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate Fig. 1 .—Radial Section.

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