HYDNUM. 145 



Spines, entire, numerous, short, greyish white. 



Stem, short, thick, firm, whitish. 



Spores, brown, .00025 to .0002 inch. 



On the ground in mixed wood of pine and chestnut. Common in 

 Minesite woods. Edible. 



H. compactum. Fr. 



Pileus, compact, tuberculate, undulated, cinereous, or 



brownish, commonl}^ dowmj^ flesh with a bluish tint. 



Spines, brown, white at the tips. 



Stem, deformed, tuberculate, short. 



Pileus from one to six inches broad. 



This deformed species is common near Cedar Cieek, and other local- 

 ities in the Valley. 



H. ^onatum. Batsch. Zoned Hydnum. 



Pileus, thin, coriaceous, expanded, deeply umbilicate, 



zoned rugose, margin pale, ferruginous. 



Spines, slender, pale fuscous, nearly the color of the pileus. 



Stem, nearly equal except the base which is tuberculate. 



Not as common as the H. compactum. Chaparral woods. Not edible; 

 too tough. 



H. graveolens. Del. Strong-scented Hydnum. 



Pileus, soft, soon becoming hard, coriaceous, not zoned, 

 but beautifully marked with a white center in contrast with the 

 umber margin. 



Spines, short, white, or light grey. 



Stem, slender, tapering downwards. 



Has a strong odor of sweet melilot. In woods near Emaus. 



H. erinaceus. Bull. Hedgehog Hydnum. 

 Tuberculiform, growing in a mass, with the spines on top or 

 pendant. 



