BOLETI OF THE UNITED STATES 97 
ish-gtay, reddish-brown, yellowish-gray, tawny-ferruginous or 
brownish; and is sometimes obscurely spotted by the drying 
gluten. The flesh is rather thick and often almost white 
except near the tubes where it is tinged with yellow. The 
tubes are small, at first almost white or very pale-yellow, 
but they become dingy-ochraceous with age. ‘The stem is 
generally short, stout and firm, whitish, pallid or yellowish, 
and often dotted to the base, though the glandules are more 
numerous and distinct on the upper part. I have quoted 
the spore characters as given in Sylloge and Stevenson's 
British Fungi, but in the American plant they appear 
ochraceo-ferruginous,* are .0003 to .00035 in. long, and 
about .coo16 broad. This species and BL. Loudzerz appear 
to be the only European species with exannulate glandular- 
dotted stems. If I have correctly estimated the characters 
of our plants we have six such species. It is true they are 
closely related to each other and may possibly be regarded 
by some as mere varieties of a single extremely variable 
species, but to me, the characters that separate them, appear 
to be constant and decisive. Most authors, including Fries, 
Persoon, Cordier, Stevenson and Curtis pronounce this 
species edible. Gillet remarks that it should be regarded 
with suspicion. I have not tested it. 
b. Stem not glandular-dotted. 
Boletus brevipes Px. 
SHORT-STEMMED BOLETUS 
Rep. 38, p. 110. Bull. N. Y. S. Mus. 2, p.65. Boletus viscosus Frost, Bull. 
Buff. Soc. p. 101 
Pileus thick, convex, covered with a ¢thzck tough gluten 
when young or moist, dark chestnut color, sometimes fading 
*In these descriptions, the color ascribed to the spores from my own 
observation is that of a mass of spores shed on white paper. The dimen- 
sions are taken from fresh spores or from dry ones moistened with water, 
and will probably exceed somewhat the dimensions of old and dried un- 
moistened ones, 
