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EDIBLE AND POISONOUS MUSHROOMS OF CANADA
flavovirens is the correct name. It is a striking species with its bright yellow
pileus and lamellae. It might be confused with T. sejunctum but the latter has
usually dark radiating lines on the pileus whereas T. flavovirens tends to
become stained reddish or brownish on the disk and is usually a more robust
species. The lamellae of T. sejunctum are usually white or whitish but may
show some yellow. T. sulphureum (Fr.) Kummer, another yellow species, is not
viscid and is characterized by a disagreeable odor resembling coal tar.
TRICHOLOMA IRINUM (Fr.) Kummer Edible
Figure 178, page 111
PILEUS 1 1/2-6 in. broad, fleshy, convex becoming expanded-plane, gla-
brous, not viscid, pale alutaceous, tinged flesh color to nearly white, margin at
first inrolled, then spreading, flesh thick, firm, whitish, taste mild, lamellae
sinuate to adnexed, crowded, whitish or nearly the same color as the pileus.
STIPE %-2 in. long, )4-% in. thick, equal or bulbous at the base, fibrillose-
striate, whitish, solid, spores ellipsoid, smooth or some minutely rough, pale
cream in mass, 7-9 X 3.5-4.5 /x.
Usually gregarious in troops on the ground in woods or open places.
Sept.-Oct.
This species has the appearance and stature of T. personatum but entirely
lacks the violet or lilac colors. According to Singer the true T. irinum has
smooth white spores but the species described above is evidently the fungus
described and illustrated by Lange and other European authors as T. irinum.
The spores appear smooth under ordinary magnifications but under oil im-
mersion a few seem to be minutely roughened.
T. irinum may be found growing in large fairy rings in the woods. I have
seen such rings 1 8, 24 feet, and one even 50 feet in diameter, forming almost
perfect circles and containing hundreds of fruiting bodies. When a tree is in the
way the mycelium appears to grow around each side of the tree and join up
again on the other side.
TRICHOLOMA PERSONATUM (Fr. ex Fr.) Kummer Edible
Figure 179, page 111
PILEUS 2-5 in. broad, sometimes larger, at first broadly convex, becoming
plane or sHghtly umbonate, glabrous, moist, becoming subviscid and water-
soaked in wet weather, grayish to brownish, tinged more or less with lilac,
fading to buff or whitish, margin at first inrolled, pruinose, then spreading and
often wavy and irregular, flesh whitish, tinged lavender, becoming water-
soaked in wet weather, taste mild, lamellae sinuate to adnexed, close to
crowded, rather broad, at first blue, becoming buff-lilac to grayish buff,
usually with tinge of lilac, with two or three tiers of shorter ones interspersed.
STIPE 1-3 in. long, J^-1 in. thick, equal or often somewhat bulbous at base,
solid, pale lilac or bluish, fading to paUid whitish, fibrillose-pruinose, becoming
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