Fungi, Ascomycetes, Ustilaginales, Uredinales . \ . ? Fig. 124. Xyiaria HypoxylonGtev., after and rising vertically from the surface of the substratum. As theygrow the stromata assume their characteristic shape, conidia appear anddrops of pinkish or yellowish fluid are exuded. When these dry up, blackdots indicating the position of the ripening perithecia are seen. 168 PYRENOMYCETES [ Fig. i 2 5. Porottia pitnc/ala (L.) Fr.; rt. surface, ^. lateral view;after Tulasne.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922