Fungous diseases of plants . se, rennetase, and coagu-lase were seemingly present,whereas negative results wereobtained in the tests for pec-tase, maltase, invertase, treha-lase, and cytase. However, astudy of the destruction of woodby the fungus furnishes evidencethat the mycelium produces cy-tase and possibly hadromase. The sporophores arise singlyor in clusters of a few brackets,usually during summer and earlyautumn. It requires but a briefperiod for these sporophores toattain their growth, bracketsmeasuring 15-25 cm. in widthhaving been observed to com-plete growth within two mat
Fungous diseases of plants . se, rennetase, and coagu-lase were seemingly present,whereas negative results wereobtained in the tests for pec-tase, maltase, invertase, treha-lase, and cytase. However, astudy of the destruction of woodby the fungus furnishes evidencethat the mycelium produces cy-tase and possibly hadromase. The sporophores arise singlyor in clusters of a few brackets,usually during summer and earlyautumn. It requires but a briefperiod for these sporophores toattain their growth, bracketsmeasuring 15-25 cm. in widthhaving been observed to com-plete growth within two mature sporophore is yel-lowish brown above, and thesurface of the cap is throwninto characteristic brown plants are commonly i 5-30 cm. broad, although one speci-men measuring 65 cm. and weighing approximately six and a halfpounds has been found (Buller). The margins of the pileus areslightly revolute even on maturity, the lower surface of the pileusyellowish, with pores at first small, later expanding, and Fig. 225. PoLviORUs squamosus: Pro-gressive Destruction of Wood(After Buller) AUTOBASIDIOMYCETES 457 The flesh is white and soft when youn<jj, becoming tough with , this sporophore persists but a single season, while adiseased tree may continue to jDroduce si:)()rophores throughout aperiod of years, and even for some time after having been felled. In the development of the sporophore a knob-shaped, fleshy bodyappears, from which may arise one or more short stems, and thechanges in one of the latter are usually about as follows : An apicaldepression is the first evidence of the pileus. Further growth inthe stem is hyponastic, raising the depression toward the horizontal,and at the same time there is rapid and distinctly one-sided lateralexpansion, and later, thickening in the region of the depression,so that it becomes a definite pileus, with the greatest growth on thesides farthest from the axis of attachment, thus eventually givingthe e
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