CALONEMA 303 



swollen when present, the threads 5-6.7 /x in thickness, with four or 

 five spirals, smooth or nearly so; spores yellow, globose, minutely 

 spinulose or delicately reticulate, 7-8 ju. 



In the English monograph this is united with H. clavata. Miss Bas- 

 kerville (1932), who has carefully compared the two species points 

 out that in clavata the fructification is clavate or pyriform, with ex- 

 panding stipe and two-thirds of the peridium remaining to form the 

 calyculus, while in stipitata the fructification is globose or turbinate, 

 with uniform stipe and less than half the peridium remaining as a 

 calyculus. The capillitium of clavata is loose and finely spinulose with 

 free ends usually evident, while that of stipitata is dense, nearly smooth 

 and with few or no free ends. The spores of clavata are coarsely warted 

 or subreticulate, those of stipitata minutely spinulose or very delicately 

 reticulate. 



Common in the eastern United States and Canada and widely dis- 

 tributed throughout northern temperate regions; British Honduras, 

 Java, Liberia. 



5. Calonema Morgan 

 Jour. Cin. Soc. Nat. Hist. 16 : 27. 1893. 



Sporangia sessile, subglobose or irregular, crowded and superim- 

 posed; hypothallus usually not evident; capillitium a network of 

 branching threads arising from the base of the sporangium, the surface 

 marked with an irregular reticulation; spores yellow. 



Related to both Hemitrichia and Oligonema, distinguished from the 

 first by the markings on the capillitium and from the second by the 

 capillitial net. 



A single species : 



Calonema aureum Morg. 



Jour. Cin. Soc. Nat. Hist. 16 : 27. 1893. 

 PI. XX, Figs. 549, 550, 551. 



Sporangia crowded or heaped in scattered clusters; peridium thin, 

 golden yellow, adorned with intricate radiating veinlets; capillitium of 

 threads more or less branched, attached below, free above, the surface 

 to the very tips venulose, interrupted with rings or fragmentary 

 spirals, the apices bulbous and obtusely conical; spore-mass yellow; 

 spores globose, by transmitted light bright yellow, reticulate as in 

 Trichia favoginea, 14-16 fx. 



Ohio, South Carolina, Maryland, Alabama, Illinois, Minnesota, 

 Arkansas. 



