to a Knowledge of the Hydnaceae 215 



named the plant H. hybridum. Fries, likewise, 'regarded these fig- 

 ures of Schaeffer as representing H. anrantiacum Sys. Myc. I : 403. 

 1821. 



I have seen specimens of the plant with the same turbinate 

 pileus as shown in part of Schaeffer's figures though the more 

 common form appears to be the concave or infundibuliform pileus 

 shown in others of his figures. That the two forms should be 

 treated as distinct species, as was done by Persoon, seems very 

 doubtful. 



21. Hydnum scrobiculatum Fries, Obs. Myc. 1: 143. 18 15 



Icon.: Fries, Icon. Select. Hym. //. 5./. //// Britzelmayer, 

 Hym. Siidb. Hydnei f. 8. 



Exsicc. : Romell, Fung. Scand. 19; Roumeguere, Fung. 

 Gall. 3007, 3626. 



New York (Cushier) ; New Jersey (Ellis) ; Rhode Island 

 (Bennett). The last reported as H. subsqiiamosum. 



The plant is closely related to H. zonatum Batsch, from which 



it is difficult to separate it absolutely. The more typical forms 

 have the surface of the pileus roughened and broken up into a 

 coarse, spongy or scaly mass. But in other forms this feature be- 

 comes a mere roughening of the surface which also appears ob- 

 scurely zonate, thus forming an easy transition to H. zonatum. 



22. Hydnum zonatum Batsch, Elench. Fung. in. 1783 



Icon. : Batsch, Elench. Fung. 2 : pL 4.0. f. 224 a, b, c ! ; 

 Nees, Sys. Pilz. //. J2. f. 242. 



Exsicc. : Ravenel, Fung. Car. 1: 25. 



Type Loc. : European. 



Connecticut (Underwood); Rhode Island (Bennett); New Jersey 

 (Ellis) ; South Carolina (Ravenel) ; Ohio and Kentucky (Morgan); 

 Alabama (Underwood). Specimens also reported but not ex- 

 amined from Florida (Calkins). 



The typical form of this species is clearly marked and readily 

 recognized by its infundibuliform, coriaceus pileus, with several 

 sharply defined zones, by its soft cinnamon brown color, and by its 



*This is of no value, a and (3 are mere copies of Schaeffer's figure of cyathi- 

 forme> while B is a copy of Batsch. 



