88 Mycetozoa of North America 



Illustration: Lister, Mycetozoa ed. 3. pi. 79. 



This species was common in eastern North America before the 

 disappearance of the chestnut trees. I have found it since on 

 much decayed chestnut wood, and on the leaves of new sapHngs. 

 In the Alleghenies, at elevations of 3000 feet and more, there are 

 still small groves of chestnut which have survived the blight until 

 now. I have visited groves in Giles and Wythe Counties, Vir- 

 ginia, and in Franklin County, North Carolina, where the asso- 

 ciated species, Arcyria glohosa, was found in abundance, but 

 C. concinnum was not observed. Later, a student wrote that it 

 appeared in Virginia as late as 1937. The form is much like 

 C. minutum, only the lime in the capillitium is yellowish brown, 

 and the sporangia are somewhat smaller. While the species has 

 been reported on other habitats, it seems to be restricted in east- 

 ern North America to the burs of the chestnut tree. 



3. Craterium paraguayense (Speg.) Lister, Mycetozoa ed. 2. 95. 

 19n. 



Didyniium paraguayense Speg. Anal. Soc. Cient. Argent. 22: 186. 1886. 

 Craterium rubescens Rex, Proc. Acad. Nat. Sc. Phila. 1893: 370. 1893. 

 (N. Y. B. G. nos. 5325, 5326, type material.) 



Plasmodium? Sporangia gregarious, goblet-shaped or cylin- 

 drical, 0.6 to 0.8 mm. high, 0.3 to 0.6 mm. broad, stalked, erect, 

 rugose, bright reddish violet, with a convex top dehiscing irregu- 

 larly and not as a distinct lid, although in a circumscissile manner, 

 if firmer; sporangial wall cartilaginous, with deposits of pale 

 violet lime-granules. Stalk cylindrical, 0.4 mm. high, thick pli- 

 cate, purple, opaque, rising from a circular hypothallus. Capil- 

 litium consisting of pale, violet threads connecting large, violet 

 lime-knots, that combine in the center to form a columella either 

 free from or connected to the top of the stalk. Spores violet, 

 nearly smooth, 8-9 fi diam. 



Type locality: Paraguay. 



Hahitat: On dead leaves and fallen Spanish moss. 



Distribution: *Canal Zone, Florida, *Iowa?, Louisiana. 



Illustration: Lister, Mycetozoa ed. 3. pi. 80. 



The species is probably not rare in the territory bordering on 

 the Gulf of Mexico. Dr. Erdman West writes he has collected it 

 frequently on fallen Spanish moss in Florida. It is related to 

 C. leucocephalum, connected through var. rufum of the latter, but 

 differing in the purple or violet color. 



