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PHYLLOTOPSIS<br />
CORTINARIUS<br />
The genus Phyllotopsis is based on the fungus that has been commonly<br />
known as Claudopus nidulans (Pers. ex Fr.) Karst. However, this species is<br />
obviously not closely related to the type species of Claudopus, C. byssisedus<br />
(Pers. ex Fr.) Gill., and should not be placed in the same genus. It seems to be<br />
more closely related to Pleurotus, especially P. serotinus (Fr.) Kummer, but the<br />
spores are colored. It has also been placed in Partus because of the tough con-<br />
sistency but the spore color excludes it here also. Sometimes the spore color<br />
has been interpreted as ochre and it has been placed in Crepidotus but the<br />
color seems to be more pink than ochre.<br />
The tomentose pileus, lack of stipe, tough consistency, colored lamellae, and<br />
small, cyHndric-allantoid pinkish spores are the chief characters of the genus.<br />
One other species, P. subnidulans (Overholts) Singer, has been described<br />
and is said to differ in having globose spores.<br />
PHYLLOTOPSIS NIDULANS (Pers. ex Fr.) Singer Not edible<br />
Figures 258, 259, page 173; Figure 421, page 300<br />
PILEUS 1/^-3 in. broad, rather tough, sessile, attached laterally or some-<br />
times narrowed behind to a stem-like base, nearly circular to reniform or<br />
fan-shaped, sometimes laterally confluent forming a shelf up to 6 in. long,<br />
convex, bright yellow, fading to buff, densely tomentose-hairy, margin<br />
strongly inrolled, odor pungent, disagreeable when fresh or sometimes lacking.<br />
LAMELLAE adnatc, close, rather narrow, bright orange-yellow, stipe lacking,<br />
but there may be a tomentose base next to the lamellae, spores flesh pink in<br />
mass, allantoid, smooth, 6-8 X 3-4 /i.<br />
In groups or clusters on decaying logs of both deciduous and coniferous<br />
trees. June-Oct.<br />
The pecuhar, pungent odor of this species is a good means of recognizing<br />
it when it is present, but sometimes it appears to be very faint or lacking.<br />
CORTINARIUS<br />
Cortinarius is a very large and difficult genus containing several hundred<br />
species. The spores are dark brown or rusty brown. The principal distinguish-<br />
ing character of the genus is the cortina or veil which covers the lamellae in the<br />
young stages. It is composed of loose silky hyphae that suggest a cobweb. If<br />
copious, the veil may remain as a ring or annular zone on the stipe, or it may<br />
disappear quite early. The typical rough spores and rusty brown spore deposit<br />
are diagnostic when the cortina has disappeared. An outer, universal veil may<br />
also be present and may leave a sheath or several annular zones on the stipe.<br />
In one section of the genus the cortina is glutinous.<br />
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