been called (in part at least) Xanthochrous, Coltriciella and Coltricia. 

 In fact if you examine the work of any of the modern name changers 

 you will find them a great deal more prolific in new names than in 

 new ideas. 



SETAE PRESENT. 



Colored setae (Fig. 196) are characters found in 

 many polyporoids and other plants, and generally 

 such plants have ferruginous context. The presence 

 or absence of colored setae on the hymenium is read- 

 ily seen with a low power microscope. They appear 



* 



ike sharp spines, usually of a deeper color than the 

 hyphae of the context. They are often called cystidia, 

 )ut appear to me to be more on the surface than true 



but appear to n 



cystidia. They have been proposed as a generic 

 character by Ellis but the idea did not meet with 

 much favor. 1 



POLYSTICTUS TOMENTOSUS (Fig. 

 197). Pileus thin, plane or depressed, dark 

 brown, ferruginous color, soft, tomentose, usu- 

 F 'a- 196 - ally without zones. 2 Context thin, hard, uni- 



form. Stipe usually mesopodal, soft, tomen- 

 tose. Pores small, 3 to mm. short (i mm.) 3 covered when young with 

 a white film. Colored setae abundant. 



This species I found abundantly in Sweden. Usually the stipe 

 is mesopodal, rarely pleuropodal. Many of the specimens are double, 

 one pileus superimposed above the other as in Fries' illustration of 

 Schweinitzii. (Icon. T. 179.) My description is drawn from plants 

 I collected in Sweden, but am not sure but that it is applicable to young 

 plants only. ( See note 5, page 4). 



SPECIMENS IN OUR COLLECTION. 



Sweden, C. G. Lloyd (abundant.) 



Tirol, Rev. Bresadola, Rev. Jaime Pujuila. 



POLYSTICTUS CIRCINATUS (Fig 198). Pileus, thick, plane 

 or depressed, of a pale, fulvous color, without zones, and with a soft, 

 velutinate surface. Context double, the lower sub-ligneous, the upper 

 layer of equal or greater thickness, soft spongy. Stipe often short, 

 thick, soft spongy, mesopodal, or in northern localities more slender 

 and usually pleuropodal. Pores at first small, round, becoming large 

 and more irregular when old, from 2 to 5 mm. long. At first covered 



1 1 know from my conversations with Professor Ellis that he took it very much to heart 

 because the mycological world did not take kindly to his idea of a genus Mucronoporus based 

 on colored setae in the polyporoids. He said, and said truly, that if colored setae in '.he Thele- 

 phoraceae make the genus Hymenochaete. why should they not make a genus in the Polypo- 

 raceae? The reason was that Corticium was a large genus and the presence or absence of col- 

 ored (and uncolored; setae are the most convenient methods to break it up, while the poly- 

 poroids have been broken up by Fries on much better and plainer characters. 



2 Fries emphasizes the character " azonate " but I found rarely specimens in Sweden that 

 were distinctly zoned. 



3 All my specimens have a thin layer of pores but as I find no spores I suspect all to be 

 immature. It seems to be a character of all these related plants that the pores when young are 

 more regular and shallow and increase in length as the plants get older. Hence in young and 

 old plants the pores appear different. 



