166 JOUEXAL OF THE MiTCHELL SoCIETY [MarcJl 



Genus Hydnltm 



Plants with a cap and stem ; fleshy ; smooth, or scaly ; growing on 

 the ground. This includes also the genus Sarcodon, as treated by 

 Banker. 



Key to the Species. 



Cap scaly, stem tapering to a small root. 



Base of stem white H. Underwoodii. (6) 



and H. Murrillii (8) 



Base of stem greenish H. fuligineo-viola- 



ceum (7) 



Cap scaly; stem not as above H. imhricatum (3) 



Cap densely tomentose or strigose H. cristatum (4) 



Cap smooth, pale flesh color H. scabripes (5) 



Cap smooth, buff color H. repandum (1) 



Cap smooth, white H. alho-magnum (2 ) 



Cap smooth, pale rose ' H. roseolus (9) 



Cap smooth, smoky olive when dry H. fumosus (10) 



1. Hydnum repandum L. 



Plates 2 and 27. 



Cap up to 10.5 cm. in diameter, usually convex, uneven and irregu- 

 lar, the margin wavy and often indented nearly to the stem ; surface 

 smooth, with the appearance and feel of leather ; color a distinct and 

 rather uniform buff, never white. Flesh soft, white, usually brittle, 

 rather thick; odor and taste slight. 



Spines soft and fragile, cream color when fresh, turning dark red- 

 dish brown in drying, slightly decurrent. 



Stem smooth, solid, up to 7.5 cm. long, but generally from 4-6.5 

 cm. long and about 1.3 cm. broad at top, usually enlarged consider- 

 ably at base; color a light creamy buff. 



Spores (of 'No. 603) white, smooth, subglobose, 6.3-7.4x7-8^1. 



This is a firm and attractive species and considered excellent for 

 food. It is not uncommon in mixed woods. It may be easily distin- 

 guished from H. alho-magnum, its nearest relative, by the white color, 

 elliptic spores and pine-woods habitat of the'latter. Banker does not 

 regard our plant as exactly typical H. repandum, but they do not seem 

 to differ from Bulliard's good figures (PI. 172). For other good 

 illustrations see Gibson, Our Edible Toadstools and Mushrooms, PL 

 27; and Taylor, Food Products I, frontispiece. 



