B. Un´derwoodii Pk. Pileus rather thin, convex, becoming nearly plane, slightly velvety, bright brownish-red, becoming paler with age. Flesh yellow, changing to greenish-blue where wounded. Tubes adnate or slightly decurrent, greenish-yellow, becoming bluish where wounded, their mouths very small, round, cinnabar red, becoming brownish-orange. Stem equal or slightly tapering upward, somewhat irregular, solid, yellow without and within. Spores 10–12 x 5µ.
Pileus 2–3 in. broad. Stem 3–4 in. long, 4–6 lines thick.
Grassy woods. Auburn, Alabama. July. Underwood.
This species is remarkable for its adnate or subdecurrent tubes, in which it departs from the character of the tribe to which it belongs according to the colors of the tubes. Peck, Bull. Torrey Bot. Club, Vol. 24, No. 3.
B. par´vus Pk.—parvus, small. Pileus convex, becoming plane, often slightly umbonate, subtomentose, reddish. Flesh yellowish-white, slowly changing to pinkish where wounded. Tubes nearly plane, adnate, their mouths rather large, angular, at first bright red, becoming reddish-brown. Stem equal or slightly thickened below, red. Spores oblong, 12.5×4µ. Pileus 1–2 in. broad. Stem 1–2 in. long, 2–3 lines thick.
Grassy woods. Auburn, Ala. July. Underwood. Peck, Bull. Torrey Bot. Club, Vol. 24, No. 3.
Versipel´les—verto, to change; pellis, a skin.
Tubes at first white or whitish, minute, round, equal, forming a convex stratum free from the stem.
| Stem black | B. alboater | ||
| Stem some other color | 1 | ||
| 1. | Stem yellow at the base | B. chromapes | |
| 1. | Stem not yellow at the base | 2 | |
| 2. | Margin of the pileus appendiculate | B. versipellis | |
| 2. | Margin not appendiculate | 3 | |
| 3. | Stem scabrous or punctate-squamulose | B. scaber | |
| 3. | Stem even | 4 | |
| 4. | Pileus white or whitish | B. albellus | |
| 4. | Pileus dark-brown | B. sordidus | |
| Peck, Boleti of the U.S. | |||
B. alboa´ter Schw.—black and white. Pileus convex, subtomentose-velvety, black. Tubes free, their mouths rather small, white. Stem black.