Murrill: Illustrations of Fungi 
225 
branches of both deciduous and evergreen trees in woods or moist 
places. The genus Tremella contains fungi that are gelatinous, 
tremulous, immarginate, not papillate, with basidia that become 
four-parted, each part bearing a single spore. The species must 
be collected during wet weather, otherwise they will not be seen. 
After drying, they may be soaked in water to restore them to their 
original form. Members of closely related genera, such as Exidia, 
Dacryomyces, and Hirneola, are liable to be confused with species 
of Tremella by the beginner. 
Mycena succosa Peck 
Juicy Mycena 
P late 137. Figure 9. X 1 
Pileus firm, between cartilaginous and fleshy, campanulate or 
convex, cespitose, 2-4 cm. broad ; surface minutely tomentose, 
cinereous or very pale reddish-gray, darker at the center, the mar- 
gin exceeding the lamellae and incurved ; context abounding in a 
thin watery or serum-like juice, changing to purplish and black 
when cut ; lamellae slightly ascending, thin, close, emarginate with 
a slight decurrent tooth, tapering toward the outer extremity, 
whitish with a pale-reddish-gray tint ; spores subglobose, minute, 
4//,; stipe firm, equal or slightly tapering upward, often curved, 
minutely tomentose, containing a whitish pith, pale-reddish-gray 
at the apex, dark-reddish-gray below, 4-8 cm. long, 2-3 mm. thick. 
This extremely interesting little species occurs in woods on fallen 
decayed trunks of deciduous trees. When wounded, it exudes a 
serum-like fluid which blackens on exposure to the air. The spo- 
rophore therefore soon becomes spotted with black when handled 
and usually turns black on drying, as in the Indian Pipe. Mycena 
haematopa is a related species which exudes a dull-reddish juice 
when wounded. 
New York Botanical Garden. 
