Class II. Key to Pore-bearing Fungi (_Polyporei_).
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.
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