SPORES HYALINE. 



We found this not rare in Sweden. It grew on pine or spruce, and 

 usually was largely resupinate, sometimes with a narrow, reflexed 

 pileus, rarely with a well formed pileus as shown in Fries' Icones. 

 We have Polyporus fragilis also in the United States. Fries records 

 Polyporus fragilis and Polyporus mollis as equally common in Sweden, 

 but what distinction he made between them is difficult to find either in 

 his description or his Icones. We found but one similar plant in 

 Sweden, and from my observation, and Fries' description and figures, 

 I came to the conclusion that what he called Polyporus mollis was not 

 Persoon's plant, but was Polyporus fragilis. Quelet's description 

 would indicate that he also had only one plant under both names. 



ILLUSTRATIONS. Fries' Icones t. 182, fig. 2, and also we believe fig. 3 (as mollis). Both 

 are more strongly pileate than the usual plant as we found it in Sweden. Sowerby's figure t. 387, 

 fig. 6, here cited, is some abnormality and has no possible relation here. 



Compare fimbriporus, Keithii, sensibilis. 



Fig. 659. Fig. 661. 



Polyporus ursinus. Fig. 660, spores magnified. Fig. 661, Pore mouths of Polyporus fragilis (X6). 



POLYPORUS URSINUS (Fig. 659). Pileus dimidiate (1x5x7 

 cm.), white, but turning reddish when bruised and on drying. Surface 

 strongly scrupose, tomentose, with rigid, tufted hairs, which have the 

 same color change as the flesh. Flesh white, soft when fresh, but 

 drying firm and hard. Pores medium large, sinuate, white, discolored 

 in drying. Spores (Fig. 660) narrow-piriform, tapering to the base, 

 2^x8-10. 



This we collected growing on pine at Temagami, Ontario, August, 

 1907. We referred it, from the description, with which it agrees 

 exactly, to Polyporus Weinmanni of Europe, but we find the type of 

 the latter plant at Kew is quite different, being Polyporus mollis. We 

 think Professor Peck has collected the same plant (cfr. Rep. 31) and 

 also referred it to Polyporus Weinmanni. 



POLYPORUS FISSILIS. Pileus soft, white, often largely re- 

 supinate behind, 3-4 inches in diameter, an inch thick. Flesh soft, 



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