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INOCYBE
INOCYBE
The genus Inocybe is a large one but it is not of much interest to the
amateur collector. Most of the species are small and can be identified only by
the use of microscopic characters. Only a few species become large enough to
attract the attention of the mycophagist, and these are best left alone. Some of
the species are known to be poisonous and the amateur collector is well advised
to avoid the entire genus.
The spores are ochre-brown in mass and may be rough or smooth or more
or less angular or tuberculate (Figure 34). Many species have cystidia on the
lamellae and the characters of the cystidia and spores are important in the
determination of species. The pileus is usually conic to campanulate and more
or less fibrillose or scaly, sometimes silky and often splitting radially. The
colors are usually rather dull, mostly shades of grown, gray, or ochre, although
there are a few species more distinctively colored.
INOCYBE FASTIGIATA (Schaeff. ex Fr.) Quel.
Figure 262, page 173
PILEUS %-2i4 in. broad, at first conic-campanulate, then more or less
expanded, umbonate, splitting readily on the margin, varying in color from
tawny to ochraceous or dull yellowish, innately fibrillose-streaked, soon becoming
conspicuously long-rimose with streaks of paler color showing as the
cuticle becomes rimose. flesh white, rather thin except at the umbo, lamellae
adnexed, moderately broad, close, pallid, then grayish oHve, finally brown-
ish. STIPE 1-21/4 in. long, Vg-i/i in. thick, equal, fibrillose, white or tinged the
color of the pileus. spores ellipsoid to somewhat bean-shaped, smooth, dull
ochre-brown, 9-12 X 5-6 (7) Mj cystidia lacking.
In groups on the ground in woods and on lawns beneath trees. June-Oct.
This species has been included because it is one of the more common
species of Inocybe and will Hkely be found by anyone collecting mushrooms.
The ochraceous colors, radiating fibrils, prominent umbo, and spHtting of the
pileus are distinctive features.
INOCYBE GEOPHYLLA (Sow. ex Fr.) Kummer
Figure 264, page 173
PILEUS 1/2-1 1/2 in. broad, at first subconic to campanulate, with incurved
margin, then expanded-campanulate to nearly plane with a small umbo per-
sisting, white, dry, radiately fibrillose-silky, splitting readily on the margin.
FLESH white, thin except on the umbo, lamellae adnate to adnexed, mod-
erately broad, close, whitish to grayish, finally pale clay-colored, stipe %-1 Yi
in. long, about i/g in. thick, equal, soHd, silky-fibrillose, concolorous with the
pileus. spores smooth, pale brown, ellipsoid, sHghtly inequilateral, 7-9.5 X
4.5-5.5 M- cystidia ventricose, fusoid, about 40-55 X 10-20 m-
183