420 IOWA ACADEMY OF SCIENCE 



With such a range of variability the form of the pileus could 

 scarcely be expected to show a considerable degree of regu- 

 larity. The surface is more or less distinctly zonate. The dried 

 specimens are buff or with a tinge of blue above while the 

 teeth have a pronounced bluish tinge in most specimens. All 

 our material is local, although Banker 8 records it as being 

 among the Holway material. On decaying branches. 

 Johnson county (Macbride, Shimek). 

 7. S. PUSILLUM (Brot.) Banker. (Hydnum pusillum Brot.) 



A species quite similar to the preceding, but more conspicu- 

 ously zonate and with noticeably smaller teeth. Two collec- 

 tions have been seen, both from dead w T ood, in one instance with 

 fragments of charcoal adhering to the fungus. Previously re- 

 ported only from New York and New Jersey. 



Johnson county (Macbride). 



IV. OREOLOPHUS P. Karsten. 



The species of this genus differ from Steccherinum primarily 

 in their fleshy texture as distinguished from the dry and tough 

 character of the members of that genus. "We have two species. 



8. C. PULCHERRIMUM (Berk. & Curt.) Banker. (Hydnum 

 pulcherrimum Berk. & Curt.) 



Two specimens in the University herbarium labelled "im- 

 mature" and referred questionably to Hydnum flabelUforme 

 Berk, are apparently identical and are to be referred here. If 

 this identification is correct we have a considerable extension 

 of range for the species to the northwest. These specimens 

 have a pronounced tawny-colored, gummy pileus. Two speci- 

 mens which are much larger and with spines a trifle longer, but 

 with very little of the gummy character of the pileus are also 

 referred here provisionally. As it may be that two closely re- 

 lated species have been confused the two series are listed sep- 

 arately, the gummy ones being designated I, and the others II. 



I. Johnson county (Macbride). II. Iowa City, Johnson 

 county (Macbride), Dubuque county (Shimek). 



9. C. CIRRATUS (Pers.) (Hydnum cirratus Pers.) 



Not uncommon in Johnson county on oak. The form is easily 

 separable from C. pulcherrimum by the lack of gum on the 

 dried pileus, and from C. septentriomlis by its less fleshy tex- 

 ture. It also differs in form from these species. When fresh 



8 Loc. cit., p. 132. 



