Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 462 BASIDIOMYCETES. scales arranged regularly in concentric lines. The stools break out from living stems through cracks in the bark or from wounds, those made by wood-peckers. The fir-wood, normally white, assumes, when diseased, a yellow or honey-colour, more or less like the sporophore, while here and there, parts may become light brown. The hyphae grow
Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 462 BASIDIOMYCETES. scales arranged regularly in concentric lines. The stools break out from living stems through cracks in the bark or from wounds, those made by wood-peckers. The fir-wood, normally white, assumes, when diseased, a yellow or honey-colour, more or less like the sporophore, while here and there, parts may become light brown. The hyphae grow in all direc- tions, but especially as white strands up and down the year-rings, while others in horizontal and vertical direction break up the wood into irregular patches (Fig. 290). In the final stages of destruction the wood will be found laminated into its separate year-rings and very much broken up into irregular pieces (Fig. 291). The sporophores of this Agaricus are not uncommon protruding from bark- cankers caused by Accidium clntinam, and its mycelium assists in the destruc- tion of the stem. Fig. 292. — Agaricus adiposus and Polyporus Hartigii. Destruc- tion of Fir-wood. The boundary of the regions affected by the two fungi is formed by a very dark line of demarkation. To the right the destruction is that produced by Hartigii, to the left by Agaricus adiposun. (v. Tubeuf phot.) Agaricus (Pholiota) squarrosus (Mull.). On living and dead stems of broad-leaved (Britain.) Ag. (Ph.) destruens (Brond.). On living and dead stems of poplar. (Britain.) Ag. (Ph.) aurivellus (Batscli.). On living and dead stems of broad-leaved tiees. (Britain.) ' FUNGI IMPEEFECTI.' The fungi placed here have life-histories which as yet have not been completely investigated, most of them being known only in the form of pycnidia or conidia. The number of species was at one time much larger, but it is gradually being re- duced as the forms are proved to be stages in the lif
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