102 



19. Boletus rubeus, n. sp. 



Pileus flat convex, rather thin edge, at first iuflexed, extended, turning up in 

 age, bright brick red when young, afterwards mottled with red and yellow, 

 very finely adpressed subtomentose, yellow under cuticle. Tubes bright lemon 

 yellow when young, stuffed, afterwards yellow, and sometimes with red 

 mouths, generally adnate, but sometimes with a slight depression. Stem 

 small, often flexuous, brick red or mottled as pileus, white tomentose at base. 

 Fleslh yellow pale in pileus and tinged reddish in stem, changing to blue. 

 Spores .0095-,0042 m. m. 



In deep woods. Rare. August. 



20. Boletus Spraguei, n. sp. 



Pileus quite hard, very dark russet or brown, covered with a minute velvety 

 scurf. Tubes very minute, yellow ochre or brownish when cut, around the 

 mouths of a rich dark maroon color, which forms a strong contrast with the 

 light color of stem, adnate when young. Stem dark brown below, croceous at 

 top, smooth above, minutely velvety below, firm, fleshy, slightly contracted in 

 the middle. Flesh white, changing to blue, texture firm and fine. The rich 

 color of the pore mouths contrasting with the yellow stem, makes it quite dis- 

 tinct from other species. Spores .0105-.00G2 m. m. 



• 



In ricli woods. July and August. 



21. Boletus luridus, Scliaeff. 



22. Boletus Frostii, Russell. 



Pileus convex, thin edge, blood red, polished, shining, 3 to 4 inches broad. 

 Tubes greenish, with blood red mouths or when in great perfection cinnabar 

 red, turning yellowish brown in age, not quite adnate. Stem blood red, firm, 

 unequal, enlarges downwards, sometimes flexuous at base, deeply reticulated. 

 The tubes and stem lose their blood red color in drying. Flesh scarcely 

 changes to blue. Spores .0126-.0043 m. m. 



In grass land under trees. August. 



23. Boletus alveolatus, B. & C. 



Pileus convex, smooth, bright crimson or maroon or lighter with patches of 

 yellow, 3 to 6 inches broad. Tubes distinct, separable, yellow with maroon 

 colored mouths, about J^ inch long, attached to stem and gradually losing 

 themselves in a superficial network on its surface. The walls of pores which 

 extend down over the surface are bright red with yellow stains. The convex- 

 ity of the mass is broken by indentations of more or less depths. Stem 3 to 4 

 inches long, % of an inch thick, very rough with the margins of rather coarse 



