172 Mycetozoa of North America 



2. Lamproderma scintillans (Berk. & Br.) Morg. Jour. Cin. Soc. 



Nat. Hist. 16: 131. 1894. 

 Stemonitis scintillans Berk. & Br. Jour. Linn. Soc. 15: 84. 1876. 



Plasmodium watery white (Lister). Total height 1 to 1.5 mm. 

 Sporangia scattered or gregarious, globose, stalked, erect, 0.3 to 

 0.5 mm. diam., usually brownish, reddish, or bronze, sometimes 

 steel-blue, iridescent; sporangial wall delicately membranous, 

 colorless, falling away in large fragments. Stalk setaceous, 

 black, shining, rising from a purple-brown, circular hypothallus. 

 Columella cylindrical, truncate, scarcely reaching to half the 

 height of the sporangium. Capillitium of rigid threads, radiating 

 from the apex of the columella, dichotomously branching and 

 anastomosing, black or purple-brown, pale at the base, colored 

 to the free extremities; the threads often connecting the apex 

 of the columella with the somewhat persistent base of the sporan- 

 gial wall are usually slender and colorless. Spores violet-gray, 

 minutely warted, 6.5-8 ju diam. 



Type locality: Ceylon. 



Habitat : On dead leaves. 



Distribution: *California, Colorado, Iowa, Kansas, Minne- 

 sota, New Jersey, New York, *Ohio, Ontario, *Oregon, Pennsyl- 

 vania, Quebec, Virginia. 



Illustration: Lister, Mycetozoa ed. 3. pi. 130. 



This species is not uncommon from June to September on dry 

 leaves in moist places that are not too wet. From L. columhinum, 

 it is distinguished in the field by the smaller sporangia, with 

 usually a brownish or reddish iridescent color. From L. viola- 

 ceum, to which it is related, it is separated by the microscopic 

 characters of the capillitium, pale at the base, and the spores, 

 which are usually smaller and distinctly marked by more sepa- 

 rated warts. On Jones Beach, Long Island, are found very small 

 sporangia, 0.2 mm. diam., on stalks 0.4 mm. high. The colonies 

 are not rare, but small, seldom more than a dozen sporangia, 

 developing on leaves and stems under bayberry bushes. 



3. Lamproderma muscorum (Lev.) Hagelstein, Mycologia 27: 



88. 1935. (N. Y. B. G. nos. 2608, 3193, 3465, authentic 



material, Hagelstein.) 

 Enerthenema muscorum Lev. Ann. Sci. Nat. IV. 20: 289. 1863. 



Plasmodium? Total height 0.6 to 1 mm. Sporangia scat- 

 tered, erect, stalked, globose, 0.3 to 0.5 mm. diam., blue or bronze. 



