Banker: Type Studies in Hydnaceae 
20J 
In a former work^ these plants were referred to Hydnellum 
zonatiim (Batsch) Karst, under a mistaken conception of that 
species which we have now corrected (see H. zonatum above). 
After a thorough search through a number of the most important 
European herbaria, we are convinced that the plants are not Eu- 
ropean forms and should be recognized as a distinct species. The 
plants do not appear to be common but have a wide distribution, 
specimens having been seen from New York, Alabama, and 
^Michigan. 
Hydnellum suaveolens (Scop.) Karst. Medd. Soc. 
Faun, et El. Fenn 5: 27. 1879 
Hydniim suaveolens Scopoli, El. Carn. 2 : 472. 1772. 
Hydnum compactum Pers. Comm. Schaeff. 57. 1800. 
Hydnum boreale Banker; White, Bull. Torr. Club 29: 553. 1902. 
There is no type specimen of Scopoli’s species, but specimens 
in Europe referred here are generally of the same type as the 
forms previously described by the writer® under this name. 
Hydnum compactum Pers. is represented in the Persoon herba- 
rium at Leyden by several specimens some of which are labelled 
in Persoon’s own hand. They do not appear to differ in any 
respect from the forms usually referred to H. suaveolens Scop. 
The blue coloration oi H. suaveolens appears to be quite vari- 
able in intensity and doubtless tends to fade with age. In old 
herbarium specimens it is usually faint. The odor likewise seems 
to vary in intensity and is probably sometimes nearly, if not 
wholly, lacking. While in some specimens it can be detected for 
years in most old herbarium specimens it has evidently disap- 
peared. In the original description of H. boreale Banker, the 
odor was stated as unpleasant on the authority of Miss White’s 
field notes. The odor of these plants is generally described as 
that of melilot. Such an odor if very strong would probably be 
unpleasant to some people. 
Hydnellum Rickerii sp. nov. 
Hymenophore terrestrial, mesopodous, scattered, or solitary, 
medium to large sized, dingy-brown or olivaceous ; pileus depressed 
* Mem. Torrey Club 12: 158. 1906. 
® Mem. Torrey Club 12: 163. 1906. 
