﻿1903] NORTH AMERICAN HYPHOMYCETES 157 



less characteristic, while the color of the spore mass is distinctly 

 more rufous. 



HETEROCEPHALUM, nov. gen. — Vegetative mycelium con- 

 sisting of fine, septate, branching, colorless hyphae growing on 

 and in the substratum. Fertile hyphae abruptly differentiated, 

 erect, stout, swelling distally to form a well-distinguished termi- 

 nal head, the whole surface of which gives rise to sporophores 

 several times subumbellately branched, the ultimate branchlets 

 abjointing successively continuous hyaline spores. The fertile 

 hypha corticated by sterile hyphae which grow upward with it, 

 eventually forming a special envelope about the sporiferous por- 

 tion of the head. 



Heterocephalum aurantiacum, nov. sp. — Color pale clear 

 orange-yellow, sometimes almost salmon colored. Sporogenous 

 hyphae four to five times successively subumbellately branched, 



irregularly bottle-shaped sporophores borne in terminal 



th 



e 1 



groups of about six or eight from branchlets of the third or fourth 

 order. Spores minute, oval to oblong, somewhat irregular in size 

 and outline. Corticating hyphae about six to ten in number, 

 giving rise to numerous (about twenty-five to fifty, more or less) 

 straight, rigid, bristle-like, tapering, septate branches radiating 

 in all directions from the head, often terminating in a slight, 

 rather abrupt, enlargement, and producing, in whorls just above 

 their two low^er septa, several lateral branchlets growing tangen- 

 tially, branching and intertwining to form a spherical envelope, 

 like basket-work, about the fertile head and coherent spore mass 

 within; the radiating setae and their branches becoming more or 

 less prominently echinulate at maturity. Spores about 3.5X3/* 



Fertile hyphae 1.5-3°"° higi^ by 8-1 4/* in diameter. Radiating 



setae about 600-1500^1* in length. Diameter of head, including 

 spore mass, 300-375/i; including envelope, 500-750/i. 



On dung of toad, Kingston, Jamaica (1890-91) ; on goat dung, Philippine 

 Islands. 



CEPHALIOPHORA, nov. gen.— Vegetative hyphae copious, 

 branching, septate, colorless. Sporophores arising as short 

 branches from the hyphae, which become more or less abruptly 

 enlarged distally to form a variably differentiated head, from the 



♦. 



