| 1. | Pores readily separating from cap, spores whitish or brownish, | Boletus. |
| 2. | Stems strictly lateral, pores in the form of tubes, mouths are separate from each other (growing on wood), | Fistulina. |
| 3. | Tubes not separable from each other, round, angular, or torn, fleshy, leathery or woody, | Polyporus. |
(Key to species of Boleti may be found in Professor Peck’s work on Boleti.)
[Class III. Key to Spine-bearing Fungi (Hydnei).]
| 1. | Spines awl-shaped, distinct at base, | Hydnum. |
| Spines awl-shaped, equal; plant gelatinous, tremulous, | Tremellodon. |
[Class IV. Key to Smooth Surface Fungi (Thelephorei).]
| 1. | Spores white, on ground, fleshy, tubiform, cap blackish, scaly, stem hollow, | Craterellus Cornucopioides. |
| 2. | Coriaceous or woody, somewhat zoned, entire, definite in form, | Stereum. |
SECTION B.
[Class I. Key to Clavariei.]
| 1. | Fleshy, branched or simple, without distinct stem, growing on the ground, | Clavaria. |
| 2. | Growing on trunks, yellowish, becoming dark, much branched, tense and straight, | C. stricta. |
| 3. | Yellow, stuffed, clubs simple or forked, of the same color, | C. inequalis. |
| 4. | Color changeable, becoming dark, light yellow, then reddish, simple, fleshy, stuffed, obovate, clavate, obtuse, | C. pistillaris. |