CONTEXT AND PORES WHITE OR PALE. 



POLYPORUS CERIFLUUS. Pileus sessile with a thin flesh. Surface rugu- 

 lose with reddish stain. Flesh white, unchangeable, stiptic to the taste. Pores 

 small, somewhat rugulose, white, drying yellowish. Spores not found in type. 



This is represented at Kew by a single specimen from South Carolina. There 

 are other collections at New York. We have one from Montana on Populus which 

 we have compared with the type. This has allantoid spores 1x5. It is a species 

 quite close to fragilis, but the pores are minute, the white flesh is unchangeable, and 

 the red stain of the pileus is natural, not due to color change. 



SPECIMENS. Montana, on Populus, James R. Weir. 



POLYPORUS ARMENIACUS. Pileus dimidiate, applanate, about 1 cm. 

 thick. Surface pale reddish, soft to touch, minutely velutinate. Context firm, 

 rigid, white with a pale pinkish cast. Pores minute, firm, 2-3 mic. long, the tissue 

 concolorous, but the mouths reddish like the pileus surface. 



Only known from types from Brazil at Kew. Other determinations are surely 

 different. Polyporus armeniacus has pale, almost white, flesh and pore tissue, but 

 the surface of pileus and pore mouths are uniformly reddish, possibly a change in 

 drying. As the name armeniacus was preoccupied by the same author, Prof. McGinty 

 proposed to change it to Polyporus Virginii-Cuboni, but the original being Polyporus 

 amorphus, the occupation was only temporary, and the change was unnecessary. 



SECTION 85. WHITE WHEN FRESH, TURNING BLUE WHEN TOUCHED. 



POLYPORUS CAESIUS. Pileus sessile, white, turning blue at 

 once when touched, and drying greyish. Flesh soft, white, turning 

 blue when broken. Pores large, sinuate, with uneven edges. Spores 

 1^2x5, rod shape, straight, hyaline, smooth. 



This is a frequent plant, usually on pine. It occurs more rarely 

 on frondose wood, and we have collected it on willow. It is common 

 in Europe and America, and recorded from Africa. There should 

 be no trouble in telling Polyporus caesius, for it is the only white 

 species that turns blue when touched. The dried specimens have a 

 greyish white cast by which they may be recognized. Sowerby many 

 years ago records that the fresh plant has an anise odor, and one of 

 our correspondents made the same observation . We have never noted 

 it. 



SPECIMENS. Many, Europe and United States. 



ILLUSTRATIONS. Both the good pictures Gillet and Sowerby (226) show white plants. 

 The characteristic blue spots when touched, which are the features of this plant, should have been 

 indicated. 



Compare caeruleus, caesio-coloratus, subchioneus. 



NOTE. Greenish spots come on Polyporus semisupinus, teste Morgan, and we believe Polyporus 

 caesiosimulans was probably based on this species. With its very minute pores it cannot be confused 

 with Polyporus caesius. 



SECTION 86. CONTEXT VERY SOFT AND COTTONY. 



POLYPORUS LEUCOSPONGIA (Fig. 665). Pileus white, 

 sessile, dimidiate, with soft, dull surface, no distinct crust. Flesh 

 white, unchangeable, very soft and spongy near the surface, more 



322 



