170 STUDIES OF AMERICAN FUNGI. 



as it seems, some variation in this respect. The stem is solid, tough 

 and elastic, curved or straight, covered with a dense black tomen- 

 tum, sometimes with violet shades. On drying the plant becomes 

 quite hard, and the gills blackish olive. 



Paxillus panuoides Fr. This species was collected during August, 

 1900, on a side-walk and on a log at Ithaca. The specimens collected 

 were sessile and the pileus lateral, somewhat broadened at the free 

 end, or petaloid. The entire plant is pale or dull yellow, the surface 

 of the pileus fibrous and somewhat uneven but not scaly. The plants 

 are 2-12 cm. long by 1-8 cm. broad, often many crowded together 

 in an imbricated manner. The gills are pale yellow, and the 

 spores are of the same color when caught on white paper, and they 

 measure 4-5 x 3-4 /<, the size given for European specimens of 

 this species. The gills are forked, somewhat anastomosing at the 

 base, and sinuous in outline, though not markedly corrugated as in 

 the next form. From descriptions of the European specimens the 

 plants are sometimes larger than these here described, and it is very 

 variable in form and often imbricated as in the following species. 



Paxillus corrugatus Atkinson. This very interesting species was 

 collected at Ithaca, N. Y.. on decaying wood, August 4, 1899. The 

 pileus is lateral, shelving, the stem being entirely absent in the 

 specimens found. The pileus is 2-5 cm. broad, narrowed down in an 

 irregular wedge form to the sessile base, convex, then expanded, 

 the margin incurved (involute). The color of the cap is yellow, 

 maize yellow to canary yellow, with a reddish brown tinge near the 

 base. It is nearly smooth, or very slightly tomentose. The flesh 

 is pale yellow, spongy. The gills are orange yellow, 2-3 mm. broad, 

 not crowded, regularly forked several times, thin, blunt, very wavy 

 and crenulate, easily separating from the hymenophore when fresh ; 

 the entire breadth of the gills is fluted, giving a corrugated appear- 

 ance to the side. The spores in these specimens are faintly yellow, 

 minute, oblong, broadly elliptical, short, sometimes nearly oval, 

 3 xi. 5-2 yu. The basidia are also very minute. The spores are 

 olive yellow on white paper. The plant has a characteristic and 

 disagreeable odor. This odor persists in the dried plant for several 

 months. 



Figure 162 is from the plants (No. 3332 C. U. herbarium) collected 

 as noted above on decaying hemlock logs in woods. A side and 

 under view is shown in the figure, and the larger figure is the under- 

 view, from a photograph made a little more than twice natural size, 

 in order to show clearly the character of the gills. The two smaller 

 plants are natural size. When dry the plant is quite hard. 



