46 



ADDENDA. 



STEPTOTHRIX. 



atra. B. & C. 



On grape cuttings. San Kaf. 



AGARICUS. (Sub. Gen ?) 



tridens. n. sp. Moore. 



CAVE FUNGUS. 



Pileus fleshy, conchiform; skin very thick, coriaceous; color light buff. Edge entire, in- 

 volute. The stem is three feet and four inches long, and is attached to the timber on which 

 it grows, and from which it hangs suspended by a disk several inches in diameter. This 

 disk is clothed with a thick, soft brown felt, which extends down and covers the stem for 

 several inches. 



At nine inches from the point of attachment the stem divides into three branches, which 

 again unite, singularly enough, at just nine inches from the point of division, and im- 

 mediately send off two lateral branches. 



The main stem continues downward, enlarging to the diameter of nearly three inches. 

 It is no longer covered with the felty mass, but is smooth and hard to the point at which 

 the shell-shaped pileus is thrown off. Here a most singular growth has taken place. From 

 all sides short branches, resembling the young antlers of a stag, are pushed out. Two of 

 these becoming more vigorous than the rest have extended downward, the larger of the 

 two dividing into three branches, thus terminating the whole in a perfect trident. 



The gills, which are distinct, notched, sinuate, and of a pale straw color, run for some 

 distance up the stem. The spores are ovate, exceedingly minute and borne on true bnsidia. 



The plant was found attached to a timber in one of the abandoned drifts of the Yellow 

 Jacket Mine, Virginia City, Nevada, at the depth of 400 feet below the surface. J. P. M. 



XXI. BOLETUS. 



luteus. Lin. E. rare. San Raf. 

 flavidus. Bull. San Kaf. 

 piperatus. Bull. San Raf. 

 variegatus. Swartz. Howards, 

 subtomentosus. Linn. E. San Raf. 

 edulis. Bull. E. San Raf . 

 impolitus. Fr. San Raf. 

 aestivalis. Fr. San Raf. 

 Satanas. Lenz. San Raf. 

 luridus. Schaeff. San Raf. 

 erythropus. Pers. San Raf. 

 versipelles. Fr. E. San Raf. 

 soaber Fr. E. San Raf. 

 granulatus. L. E. San Raf. 

 bovinus. L. E. San Raf. 

 castaneus. Ball. San Raf. 



XXII. FISTULINA 



