Boletus edulis. Bull.—Var. clavipes. Pk.
Club-Footed Boletus. Edible.
Figure 290.—Boletus edulis, var. clavipes. Two-thirds natural size. Note confluent caps on right.
Clavipes means club-footed. Pileus fleshy, convex, glabrous, grayish-red or chestnut-color. Flesh white, unchangeable. The tubes at first concave or nearly plane, white and stuffed, then convex, slightly depressed around the stem, ochraceous-yellow. Stem mostly obclavate, inversely club-shaped, and reticulate to the base. The spores oblong-fusiform, 12–15×4–5µ. Peck. 51st Rep.
The club-footed Boletus is very closely related to B. edulis. It differs, perhaps, in a more uniform color of the cap, and in having tubes less depressed around the stem, and less tinted with green when mature. The stem is more club-shaped and more completely reticulated.
The pileus in the young plant is much more highly colored and fades out in age, but the margin does not become paler than the disk as is often the case with B. edulis. The specimens in Figure 290 were found in Michigan and photographed by Dr. Fischer. They are quite as good as B. edulis.