22 * The Botanical Gazette. [January 



The R. nigripes of Constantin which occurs upon Pesiza 

 armaria approaches it in bearing a large number of spores: 



but is at once distinguished bv its smaller size, dark color and 

 by the absence of the peculiar constriction below the head 

 present in our species. 



Sigmoideomyees n. gen. 



Fertile hyhae erect, septate, growing in sigmoid curves, in- 

 tricately branched, the main branches subdichotomous or 

 falsely dichotomous, the ultimate branches sterile. Spores 

 solitary, thick walled, borne on the surface of spherical heads. 

 Heads borne at the apex of short lateral branches which arise 

 from opposite sides of certain cells in the continuity of the 

 hyphae. 



Sisnuoitleoniyt-es Uispiroides n. sp. — Plate IV, figs. 15-18. 



Fertile hyphae forming brownish yellow tufts about 1 mm. 

 high, coherent through the interlocking of the numerous 

 curved branches, the main axis (and its principal branches) 

 growing in a more or less regular succession of sigmoid curves, 

 giving off the main branches from the convex side of each 

 curve, the cell which bears the branch also producing a short, 

 nearly cylindrical, lateral outgrowth from either side, in a 

 plane at right angles to that of the branch. Each of these out- 

 growths is septate near its base and apex and terminated by a 

 perfectly spherical head. Ultimate branches curved and ster- 

 ne, sometimes greatly elongated, giving rise to a succession 

 of still smaller curved sterile branches from their convex sides, 

 [leads 3fy* (35-45/*) in diameter. Spores broadly elliptical to 

 nearly spherical, yellowish, finely echinulate, 10x17//. 



On rotten wood. Burbank. K. Tennessee. 



A single specimen of this peculiar plant was collected at 

 Burbank on the under side of a moist log on which it pro- 

 duced a few scattered tufts of varying size. The fungus had 

 reached maturity, and owing to the fact that it separates with 

 great readiness at the septa, it was impossible to determine 

 whether the fertile hyphae were produced from a few fine fila- 

 ments which could be seen running upon the wood at the base 

 of some of the specimens examined, or whether the sterile 

 hyphae had wholly disappeared. The heads also break off 

 when mature, even while the spores are still in si tit, carrying 

 with them the last cell of the short stalk which bears them. 

 A certain number of the ultimate sterile branches are contin- 



