. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 448 pinuHin Bresadola or F. fulvus Scop, of 11. Hartig). Sporophores on silver tir, less commonly on spruce. Their form varies much, according as they occur on a branch or on the stem. In the former case, the sporophore forms a swelling below and on each side of the more or less horizontal branch. On the stem they are more or less bracket-like. The sporophores are reddish brown with a smooth upper sur
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 448 pinuHin Bresadola or F. fulvus Scop, of 11. Hartig). Sporophores on silver tir, less commonly on spruce. Their form varies much, according as they occur on a branch or on the stem. In the former case, the sporophore forms a swelling below and on each side of the more or less horizontal branch. On the stem they are more or less bracket-like. The sporophores are reddish brown with a smooth upper surface on which zones are only faintly indicated or altogether absent. Internally they are of a brownish or tawny colour, and exhibit concentric strata, which do not extend into the pore-layer; they are thus distinguished from sporophores of 1'. igniarius and others. The sporophores are very frequent on cankered stems of fir where the canker-spots afford easy entrance for the spores. The wood-destruction consists in a white-rot. The wood becomes yellowish- white with clear spots and tine dark lines, especially where in contact with healthy parts. The mycelium is yellow- ish, and consists of thick hyphae with lateral branches forming tangled masses which frequently fill up the cavity of the bordered pits. This mycelium gives off very fine branches which bore through the cell-walls and dissolve them in such a way that the middle lamellae disappear first and leave the remainder of the wall- thickening for a time isolated before it too is used up. In this way large holes are formed in the elements of the wood. Polyporus sistotremoides (All), et Schw.) (/'. Schwcinitzii Fr. or P. moJlk Fr. of li. Hartig)^ (Britain). Sporophores almost circular with a short thick central stalk; while young they are light brown and spongy, but when older become dark brown and corky. The upper surface is downy; the hymenial layer extends far down the stalk, when young it is yellowish green, ' R. Hartig,
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
