This is an African form which is found in the museum both at Kew and 

 Berlin. At Kew the stems are more yellowish and it was referred as a variety 

 of xanthopus. Dr. Henmngs gave the same form the name as alx.vi 



POLYSTICTUS PSEUDO-PEREXXIS (Fig. 339). Pileus 

 densely covered with appressed velvety hairs, faintly zoned with nar- 

 row, subglobose zones. Pores minute, cinereous. Stem dark. 



This is only known from one collection from Africa in tin- museum at 

 Berlin. It was referred by Dr. Hennings to Polystictus Holstii 4 It is a 

 strongly marked plant and at first view does not seem to belong in this group. 

 The dense coat of pale, velvety hairs on the pileus and the size give it a re- 

 semblance to old, weathered specimens of Polystictus perennis. 



Fig. 340. 

 Polystictus affinis. 



POLYSTICTUS AFFIXIS (Fig. 340). Stipe lateral, smooth, 

 dark bay, or black. Pileus smooth. 



1 have not seen the type of this, but it was well illustrated by Xees von 

 Esenbeck. Plants corresponding to the figure are not rare in the museums, 

 though all plants so named in the museums do not correspond to the figure. It 

 is the form intermediate between the two extremes, with the smooth pileus of 

 xanthopus and the form and stem insertion of flabelliformis. 



POLYSTICTUS LUTEUS (Fig. 341). Stipe lateral, smooth, 

 dark. Pileus glabrous, but rugulose. 



This plant was also well illustrated by Xees von Esenbeck. but badly 

 named, for it is no more "luteus" than any other species, nor is .it so shown. 

 It is practically the same plant as affinis except more robust, thicker, and 

 with more obese stem. Polystictus Makuensis from Africa is only an extremely 

 robust form. In the museums one often finds pale yellowish specimens of 

 Polystictus xanthopus determined as this species, but there is no warrant for 

 such determinations excepting that luteus is misnamed.-' 1 



4 As I remember it, it is the only collection in the Holstii cover, the types of Polystictus 

 Holstii being in the exhibition department. 



3 Polystictus luteus does not occur in the United State?, nor is any similar plant found. 

 though a number so named by Herkeley are in existence. They should have been referred 

 to his own new species, Polystictus mutabilis. 



53 



