REPORT OF STATE BOTANIST, 1 897 309 
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. The flesh is white 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 con¬ 
sists of the minute branny particles upon it. They are so small and 
pale that they are easily overlooked. 
There is a variety in which the cap is corrugated or irregularly 
pitted anl wrinkled. Its name is Boletus subglabripes corrugis Pk. 
The cap is i| to 4 in. broad, the stem is 2 to 3 in. long and 
4 to< 8 lines thick. The plants are found in woods in July and 
August. 
Boletus edulis Bull. var. clavipes Pk. 
Club-stemmed Boletus 
Plate 54 
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 in. 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 de¬ 
pressed around the stem and less tinted with green when mature and 
in having the stem more club-shape and commonly reticulated to 
the base. The lower reticulations are usually coarser but less per- 
