32 



Mycetozoa of North America 



Lime-knots white. 



Sporangial wall single. 



Sporangia subglobose or forming plasniodio- 

 carps, white or gray; spores pale brownish 

 violet, 7-10 n diam. 

 Sporangia subglobose, dark gray, heaped, 

 the walls usually with scanty or no lime 

 deposits; spores brownish violet, 10-13 ^ 

 diam. 

 Sporangia white, also forming plasmodio- 

 rarps; spores often ovoid, purplish brown 

 marked with a pale line. 

 Sporangia forming j'ellow or orange-yellow, 

 laterally compressed plasmodiocarps; lime- 

 knots angular. 

 Sporangia gray, much compressed, forming 



rosettes; lime-knots fusiform. 

 Sporangia small, crowded, chestnut-brown; 

 capillitium elastic, expanding. 

 Sporangial wall double. 



Sporangia scattered, forming plasmodio- 

 carps. 

 Plasmodiocarps sinuous, much com- 

 pressed, white; spores purplish brown, 

 marked with strong spines and ridges. 

 Plasmodiocarps sinuous, much com- 

 pressed, white or buff; inner wall frag- 

 ile, colorless; spores purplish brown, 

 spinulose. 

 Plasmodiocarps sinuous, buff or brown, 

 marked with pale lines of dehiscence; 

 spores pale brownish violet, nearly 

 smooth. 

 Plasmodiocarps white, usually com- 

 pressed; inner wall purplish, persistent; 

 spores dark purplish brown, spinulose. 

 Sporangia crowded, reniform or subglobose. 

 .Sporangia white, subglobose; outer wall 



shell-like. 

 Sporangia 3'ellow; spores dark, rough, 



10-13 fj. diam. 

 Sporangia yellow; spores pale, nearly 

 smooth, 8-10 )u diam. 

 Lime-knots yellow, red, or brown. 



Plasmodiocarps slender, yellow; lime-knots 



branc'hing, pale yellow. 

 Plasmodiocarps and lime-knols brown. 

 Sporangia red or brown; lime-knots large, 

 angular, red (jr brown. 



40. J^. cinereum 



41. P. confer lum 



42. P. ovisporum 



43. P. superbum 



44. P. gyros um 



45. P. Famlntziui 



46. P. echinosporuni 



47. P. bivalve 



48. /-*. bogoriense 



49. P. biledum 



50. P. teslaceuDi 



51. P. contextum 



52. P. cougloiiieruLum 



^^. p. Scrpida 



54. P . acncHDi 



55. I\ rubiginosiini 



