to a Knowledge of the Hydnaceae 213 



Although this plant has been quite largely reported it seems 

 doubtful if the true H. suaveolens of Scopoli has ever been found 

 in this country. This notice of it would, therefore, have been 

 placed with the Species dubiae, but that in the collections a plant 

 with uniform characteristics is quite generally found referred to 

 this species. Unless this plant undergoes considerable change in 

 drying it does not appear to possess the characteristic blue color 

 so strongly emphasized in the descriptions of H. suaveolens Scop. 

 In many ways the American plant seems closely related to H 

 albonigrum Pk. and H. vellereum Pk., differing from the former 

 chiefly in the lighter color of the interior (not black) and in the 

 cream colored or buff surface of the pileus. It differs from the 

 latter in the darker color of the interior, and in its buff pileus ; it is 

 also more regularly mesopus in form. In fact it appears in many 

 of its features to be intermediate between H. albonigrum and H. 

 vellereum and is specifically distinguished by its cream colored 



pileus. 



It is very desirable that accurate observations should be made 

 on this plant in its fresh state, and its true position definitely de- 

 termined. 



1 8. Hydnum ferrugineum Fries,* Obs. Myc. I : 133. 18 15 

 Icon.: Fries Icon. Select. Hym. //. 4; Krombholz. //. 50. 



f. 10, 11. 



Bresadola Fung. Trid. pi 143 ; Bulliard, Herbier de la France 

 pi. 409 are cited under this name, but they do not represent 1L fer- 

 rugineum Fr. Bresadola's figure may be possibly H. scrobiculatum. 



Exsicc: Roumeguere, Fung. Gall. 2308; Desmazieres, PL 

 Crypt, de France 2 1 59 (?) ; Ravenel, Fung. Amer. 433 ; f Ravenel, 

 Fung. Car. 3: 17.% Exsiccati appear to furnish no satisfactory 



information on this species. 

 Type Loc : European. 



* Fries's name for this plant is excluded by //. ferrugineum Pers. Tent. Disp. 

 Meth. Fung. 30. 1797, which was given to a resupinate species. It should be known 



H. 



1833. 



f In the set examined the specimens are uncertain and of little value. 



% The specimen under this number in the set examined is not H. ferrugineum Fr. 

 but is a peculiar brick red plant that has been quite generally referred here. It seems 

 probable -that it is an undescribed species. 



