SvavE Museum or NAtruRAL HISTORY. 85 
Russula sordida, Pk. 
A large form of this species was found growing under hemlock 
trees at Gansevoort. The pileus was four to eight inches broad, at 
first white or whitish, umbilicate or centrally depressed; then more 
or less stained with smoky-brown or blackish hues and subinfundi- 
buliform. The flesh is white and taste mild; the stem is short, one to 
two inches thick, solid, white, and somewhat pruinose; the lamellz 
are distant, unequal, very brittle, tinged with yellow. Every part of 
the plant turns blackish or violaceous-black where wounded. By this 
character it is distinguished from R. nigricans, in which the flesh at 
first becomes red where broken. 
Marasmius salignus, Pk. var. major. 
Pileus six to ten lines broad; lamellz broad, distant, decurrent, the 
interspaces venose; stems often cespitose. 
Bark of willows. Gansevoort. July. 
Marasmius androsaceus, /’. 
Two forms of this species occur here as in Europe. There the form 
with paler pileus grows on fallen leayes of frondose trees, the one 
with darker or fuscous pileus on léaves of Misc trees. Here the 
form with pale pileus abounds, in wet weather, on fallen leaves of 
spruce trees, and the one with fuscous pileus on fallen pine leaves. 
Often the two forms grow in close proximity to each other, yet, in 
every instance observed, the difference of color corresponds to this 
difference in habitat. 
Marasmius preeacutus, Lillis. 
Fallen pine leaves. Catskill mountains. September. 
Polyporus ceruleoporus, Pk. 
On exposure to the light the blue color gradually fades to a grayish 
hue. Sometimes specimens occur with one-half of the pileus exposed 
and faded, the other half sheltered and retaining its normal grayish- 
blue color. The pores retain the blue color longer than the pileus, 
but the whole plant fades in drying. The flesh of the pileus is white. 
Polyporus vulgaris, /’r. 
A form with vesicular pores, a vertical section of the hymenium being 
porous, was found on poplar at Gansevoort. September. P. obducens, 
P. adustus and P. subacidus have all a similar vesicular form. I am 
satisfied that the genus Myriadoporus, which was founded on such . 
forms, is not a good one and should be abandoned. 
