RI'.I'OKI ON I. Mill I I CM, I [895-99 173 



furfuraceous, pale yellow; spores oblong or subfusiform, .0005 to .0011', oi 

 an inch long, .00016 to .0002 broad. 



The smoothish stemmed boletus is well marked by its cylindric, minutely 

 scurfy stem, which is colored like the tubes. Its cap is smooth and nearly 

 always some shade of red or bay. Specimens occur occasionally in which it 

 approaches grayish brown or wood brown. I he flesh is white or yellowish, 

 and unchangeable when cut or broken. 



The tubes at first have a nearly plane surface but this becomes somewhat 

 convex with age, and slightly depressed around the stem. The tube mouths 

 are small and nearly round. The color of the tubes is at first a beautiful 

 pale yellow but it becomes darker or slightly greenish yellow with age. 



The stem is colored very nearly like the tubes, but sometimes it has a 

 slight reddish tint toward the base. Its peculiar feature consists of the 

 minute, branny particles on it. They are so small and pale that they arc- 

 easily overlooked. 



There is a variety in which the cap is corrugated or irregularly pitted 

 and wrinkled. Its name is Boletus su b g 1 ab r i p e s c r r u g i s Pk. 



The cap is 1.5 to 4 inches broad ; the stem is 2 to 3 inches long and 4 

 to 8 lines thick. The plants are found in woods in July and August. 



Boletus edulis clavipes /'/-. 

 Club stemmed Boletus 



PLATE 65, fig. I-S 



Pileus fleshy, convex, glabrous, grayish red, bay red or chestnut color, 

 flesh white, unchangeable ; tubes at first concave or nearly plane, white and 

 stuffed, then convex, slightly depressed around the stem, ochraceous yellow ; 

 stem mostly obclavate and reticulate to the base ; spores oblong fusiform, 

 .0005 to .0006 of an inch long, .00016 to .0002 broad. 



The club stemmed boletus is so closely related to the edible boletus and 

 so closely connected by intermediate forms that it seems to be only a variety 

 of it, but one worthy of illustration. It differs in the more uniform color of 

 the cap, in having the tubes less depressed around the stem and less tinted 

 with green when mature and in having the stem more club-shaped and com- 

 monly reticulated to the base. The lower reticulations are usually coarser 



