i 4 



Cincinnati Society of Natural History. 



yellow-brown membrane, most of the outer surface covered 

 with minute, white granules of lime, the basal portion naked. 

 Stipe very short, plicate, red-brown, arising from a small 

 hypothallus. Capillitium of tubules forming a loose net- work 

 bearing large, irregular, white nodules of lime, sometimes 

 confluent in the axis of the sporangium. Spores globose, 

 very minutely warted, violaceous, 7-9 mic. in diameter. 



Growing on old leaves, herbaceous stems, etc. Sporangium 

 together with the stipe 1-1.5 mm. in height and .25~.35 mm. 

 in thickness, the stipe .2-4 mm. in length. This is a com- 

 mon species everywhere in the United States, and perfectly 

 distinct from Craterium convivale. It is Craterium cylindricum 

 of Massee's monograph, according to leister. 



§2. Cupularia, Iyink. Sporangium irregularly dehiscent, 

 breaking up and gradually falling away from the apex down- 

 ward. 



a. Stipe shorter than the sporangium. 



5. Craterium convivai^k Batsch. Sporangium obovoid 

 or oblong-obovoid, stipitate; the wall hyaline, thin and 

 fragile above, the lower portion a thickened and brownish 

 membrane, the surface, usually most of it, covered with 

 minute white granules of lime, the base naked and brown. 

 Stipe very short, erect, red-brown, plicate, arising from a 

 small hypothallus. Capillitium of tubules forming a dense 

 net-work, bearing numerous large irregular white nodules of 

 lime, which are often confluent in the axis of the sporangium. 

 Spores globose, very minutely warted, violaceous, 8-10 mic. 

 in diameter. 



Growing on old leaves, herbaceous stems, etc. Sporangium 

 .6-1.0 mm. in height including the stipe and .3-5 mm. in 

 diameter, the stipe much shorter than the sporangium. The 

 thin apex breaks up into pieces and falls away, leaving some- 

 times a regular cyathiform portion, at other times the margin 

 is broken and irregular. This is Craterium leucocephalum of 

 Rostafinski's monograph. The specimens of Physarum 

 scyphoides C. & B. which I have seen appear to be a small 

 form of this species. 



H 



