232 university of colorado studies 



Class ENDOSPORE^ 



The genera down to Enerthenema have the spores violet, violet-brown or pale 

 ferruginous; those beyond have them variously colored, but not violet or violet- 

 brown, except in some species of Cribraria not yet found in Boulder County. The 

 genera from Badhamia to Spumaria have the sporangia provided with calcium 

 carbonate. 



Order PHYSARACEM 



Lime in the form of minute round granules. 



Family BADHAMIIDiE 

 Capillitium (interior network of sporangium) charged with lime throughout. 



(14) Badhamia Berkeley. 



B. panicea (Fr.). On fallen Cottonwood and box-elder logs. Sporangia i mm. 

 diameter, white. 



B. popidina Lister. AlUed to B. capsuUfera, but with white plasmodium and 

 banded spores. Sporangia white, grey or pinkish, usually in dense clusters 

 (Sturgis). On Cottonwood and box-elder bark. 



B. versicolor Lister. On bark of box-elder. Sporangia very small, .3 to .5 mm. 

 diameter, pure grey or with a tinge of flesh-color. Boulder is the only known 

 ■ locality in America (Sturgis, 1907). 



B. orbiculata Rex. Sporangia discoid or annulate, on short blackish stalks. On 

 bark of cottonwood. An apparently distinct variety also occurred. 



Family PHYSARID^ 



Capillitium of hyaline threads with vesicular expansions filled with lime (Hme- 

 knots). 



(15) Physarum Persoon. Fructification simple, sporangium wall membranous, 

 calcareous. P. viride (Bull.), varieties luteum (Bull.) and incanum; P. nutans Pers. 

 and var. robustum Lister. These two species belong to the subgenus Tilmadoche 

 Fries. 



Macbride, who treats Tilmadoche as a genus, writes as follows: Aside from the 

 general delicacy of structure the principal distinctive feature of Tilmadoche is 

 the capillitium. The threads of the capillitium rise vertically from the flat, 

 generally persistent base of the peridium, and hence are in their general course 

 nearly parallel one to the other. This is in sharp contrast with the netted 

 intricate framework of Physarum. 



P. nefroideum Rost.; P. cinereum (Batsch.); P. contextum Pers.; P. diderma Rost., 

 var.; P. sinuosum Bull.; P. didermoides (Ach.), var.; P. lateritium (Berk, and Br.); 

 P. auriscalpium Cke. 



(16) Cienkowskia Rostafinski. Sporangium wall cartilaginoid at base; capillitium 

 with free hooked branches; lime-knots taking the form of vertical plates. 



C. reticulata (Alb. and Schw.). A remarkable species easily recognized by the 

 creeping and anastomosing plasmodiocarps of a brownish color, marked with dull 

 scarlet bosses (Sturgis). 



