10 Cincinnati Society of Natural History. 



Q. Changing to yellow. 



15. B. CASTANEOS, Bull. — Pileus convexo-expanded or depressed, 

 firm, velvety, cinnamon. Stipe stuffed tben hollow, tapering upward 

 from a somewhat bulbous base, velvet}' concolorous. Flesh white, not 

 changing color. Tubules free, short, white; the pores minute, round. 

 Spores 3^ellow, subelliptic, with an oblique apiculus, .008 — .OlOX 

 .0055 mm. 



In hill}' woods, in summer; common. Pileus 2-2^ in. broad, stipe 

 2^-3 in. long, and ^-f of an inch thick at the base. The chestnut 

 color varies from pale to dark; the texture is quite dry, not fleshy or 

 juic}'; the tubules finally take on the pale 3'ellow color of the spores. 



16. B. EDULis, Bull. — Pileus pulvinate, glabrous, moist, brownish. 

 Stipe stout, reticulate, brownish-pallid. Tubules semi-free, elongated; 

 the pores minute, angular, white then yellow or greenish. " Spores 

 large, greenish ochre." 



On the ground in woods, in summer; rare. Pileus 3-6 in. broad, 

 stipe 4-6 in. long, and 1-1^ in. thick. The flesh is white, turning a 

 little reddish near the epidermis, at first compact, then softer. It is a 

 stout, flesii}' Boletus, said to be delicious eating. It is thought to be 

 the Suilliis, which, on the testimony of Plinj^ his countrymen were in 

 the habit of fetching from Bithynia; it is the modern Porcino which is 

 sold in strings, during the winter, in every market place throughout 

 Italy. 



