30 BULLETIN N. Y. STATE MUSEUM. 



Synopsis of the Species. 



1 Hymeninm clearly lamellate. 2. 



2 Pileus white, stem present. P. simulans. 



2 Pileus colored. 3. 



3 Stem glabrous. P. involutus. 



3 Stem densely hairy. P. atrotomentosus. 



3 Stem none. P. panuoides. 



1 Hymenium wholly porous. P. porosus. 



Paxillus simulaiis n. sp. 



Simulating Paxillus. 



Pileus broadly convex, expanded or subinfundibuliform, compact, 

 subglabrous, even or somewhat scabrous-pustulate, white or whitish, 

 the involute margin often tomcntose-hairy, flesh white ; lamellae 

 close, forked, crisped near the stem, aduate or decurrent, ivliite, then 

 ochraceous-yellow tinged with salmon color ; stem central, short, firm, 

 equal, stuffed or hollow, pubescent, white ; spores pale ochraceous- 

 yellow, subglobose or broadly elliptical, .0002 to .0003 in. long, .0002 

 in. broad. 



Plant 1 to 3 in. high, pileus 2 to 4 in. broad, stem 6 to 12 lines 

 thick. 



In thin woods. Sandlake. July. Rare. 



A large species externally resembling Lactarius vellereus, and per- 

 haps hitherto confused with it, but easily distinguished from it by the 

 absence of a milky juice and by the lamellae which are crisped near 

 the base and which soon assume a peculiar salmon-yellow hue, which 

 also appears in the spores when collected on white paper. This 

 change of color begins in the crisped portion near the stem and gradu- 

 ally advances toward the outer extremity. In the dried specimens the 

 lamellae are ochraceous-brown and they have the edge more or less 

 beaded with white granules. They are often forked near the outer 

 extremity as well as toward the inner. The length of the stem some- 

 times scarcely exceeds its breadth. In but a single instance was it 

 eccentric, and in that case the pileus was lobed and irregular. The 

 surface of the pileus is sometimes roughened with minute pustules or 

 papillae and sometimes has a pitted appearance. Rarely the margin 

 is obscurely zonate. The taste is bitterish and unpleasant, and some 

 times the plant emits a subacid odor. It is a singular species. 



Paxillus iuvolutus Fr. 



Involute Paxillus. 



Pileus compact, convex or expanded, sometimes centrally de- 

 pressed, glabrous, viscid tvJien moist, varying in color from grayish 



