WHITE-SPORED AGARICS. 93 



groves during the autumn, on dead limbs or trunks, or from dead places 

 in living ones. The plants are very viscid, and the stem, except in 

 young plants, is velvety hairy with dark hairs. Figure 95 is from plants 

 (No. 5430, C. U. herbarium) collected at Ithaca, October, 1900. 



Collybia longipes Bull., is a closely related plant. It is much 

 larger, has a velvety, to hairy, stem, and a much longer root-like 

 process to the stem. It has been sometimes considered to be merely 

 a variety of C. radicata, and may be only a large form of that species. 

 I have found a few specimens in the Adirondack mountains, and one 

 in the Blue Ridge mountains, which seem to belong to this species. 



Collybia platyphylla Fr. Edible. This is a much larger and stouter 

 plant than Collybia radicata, though it is not so tall as the larger 

 specimens of that species. It occurs on rotten logs or on the ground 

 about rotten logs and stumps in the woods from June to September. 

 It is 8-12 cm. high, the cap 10-15 cm. broad, and the stem about 2 

 cm. in thickness. 



The pileus is convex becoming expanded, plane, and even the 

 margin upturned in age. It is whitish, varying to grayish brown or 

 dark brown, the center sometimes darker than the margin, as is 

 usual in many plants. The surface of the pileus is often marked in 

 radiating streaks by fine dark hairs. The gills are white, very 

 broad, adnexed, and usually deeply and broadly notched next the 

 stem. In age they are more or less broken and cracked. The spores 

 are white, elliptical, 7-10x6-7/^. 



The plant resembles somewhat certain species of Tricholoma and 

 care should be used in selecting it in order to avoid the suspected 

 species of Tricholoma. 



MYCENA Fr. 



The genus Mycena is closely related to Collybia. The plants are 

 usually smaller, many of them being of small size, the cap is usually 

 bell-shaped, rarely umbilicate, but what is a more important charac- 

 ter the margin of the cap in the young stage is straight as it is applied 

 against the stem, and not at first incurved as it is in Collybia, when 

 the gills and margin of the pileus lie against the stem. The stem is 

 cartilaginous as in Collybia, and is usually hollow or fistulose. The 

 gills are not decurrent, or only slightly so by a tooth-like process. 

 Some of the species are apt to be confused with certain species of 

 Omphalia in which the gills are but slightly decurrent, but in Omphalia 

 the pileus is umbilicate in such species, while in Mycena it is blunt 

 or umbonate. The spores are white. A large number of the plants 

 grow on leaves and wood, few on the ground. Some of those which 

 grow on leaves might be mistaken for species of Marasmius, but in 



