170 Mycetozoa of North America 



Type locality: Oregon. 

 Habitat: On dead wood. 

 Distribution: Oregon, *Washington. 



Illustration: Macbr. & Martin, Myxomycetes pi. 13, jigs. 

 307, 308. 



3. Enerthenema Berkeleyanum Rost. Mon. App. 29. 1876. 



Enerthenema syncarpon Sturg. Colo. Coll. Pub. Sc. Ser. 12: 448. 1913. 



(N. Y. B. G. no. 12622, type.) 

 Enerthenema papillatum (Pers.) Rost. var. syncarpon (Sturg.) G. Lister, 



Mycetozoa ed. 3. 150. 1925. 



Plasmodium? Similar to E. papillatum but usualh" a little 

 smaller, darker, and with strongly spinose, somewhat darker 

 spores, 12-14 /x diam., clustered in groups of four to twelve. 



Type locality: South Carolina. 



Habitat: On dead wood and dressed lumber. 



Distribution: Colorado, Massachusetts, New Hampshire, 

 New Jersey, New York. *South Carolina. 



Illustration: None published? 



E. melanospermum and E. Berkeleyanum are closely related to 

 E. papillatum. In the genus Enerthenema any other form must 

 be similar to the type species as the generic characters are limited. 

 The three species, nevertheless, are sharply defined. 



Genus 19. LAMPRODERMA Rostafinski, Versuch 7. 1873. 



Sporangia usually stalked, rarely sessile, globose or ellipsoid; 

 sporangial wall membranous, somewhat persistent, shining with 

 iridescent colors; stalk black; columella cylindrical or clavate, 

 usually reaching to half or more than half the height of the 

 sporangium; capillitium consisting of branched, anastomosing 

 threads, radiating chiefly from the upper part of the columella. 



Type species: Physarum columbinum Pers. 



Spores spinulose, wanted or nearly smooth (see also 8). 

 Columella dividing above into the few primary branches 



of the dark, flexuose capillitium. 1. L. arcyrionema 



Columella distinct; capillitium spreading from the 

 upper part of the abruptly ending columella. 

 Sporangia iridescent. 



Sporangia globose, usually iridescent brown; 

 threads of capillitium dark with pale bases; 

 spores 6.5-8 n, distinctly warted. 2. L. scintillans 



