30 



Mycetozoa of North America 



Yellow or orange; columella large, sub- 

 globose or clavate. 

 Yellow; sporangia robust; columella 



small, conical or obtuse. 

 Pale yellow; sporangia slender; columella 

 none. 

 Sporangia and lime-knots white. 



Stalk white or brown below; lime-knots 



small; columella conical. 

 Stalk white; columella none, replaced by 



a central ball of lime. 

 Stalk ochraceous, often absent; sporangia 

 subglobose, obovoid or cylindrical, 

 with a long pseudo-columella, or form- 

 ing plasmodiocarps. 

 Stalk, sporangium, and lime-knots red. 

 Stalk, sporangium, and lime-knots brown. 

 Stalk, sporangium, and lime-knots purple. 

 Stalk, sporangium, and lime-knots lilac. 

 Stalks without lime, or with deposits in the wall only 

 (see also 13). 

 Sporangium and lime-knots purplish red. 

 Sporangium and lime-knots violet-purple. 

 Sporangium glossy, mottled blue with red; stalk 



red or orange; lime-knots orange. 

 Lime-knots yellow or orange; sporangia yellow, 

 orange, or gray. 

 Sporangia subglobose or lenticular, usually 

 on slender stalks; lime-knots fusiform, 

 rarely angular; spores pale. 

 Sporangia discoid, with rod-like lime-knots; 



spores purplish-brown. 

 Sporangia contorted, stalked, usually adher- 

 ing in clusters; capillitium lax; lime-knots 

 fusiform. 

 Sporangia subglobose, yellow or iridescent 

 bronze; stalks red-brown; capillitium 

 dense, persistent; lime-knots small, an- 

 gular. 

 Sporangia small, globose, yellow, on leaves; 

 stalks slender, yellow; lime-knots angular. 

 Sporangia globose, yellow, on wood; stalks 



reddish; lime-knots large and branching. 

 Sporangia subglobose, pale >ellow; stalks 



when present membranous. 

 Stalk red, translucent, penetrating the spor- 

 angium to near the apex. 



4. P. Listeri 



10. P. citrinum 



11. P. teneriim 



5. P. globulijerum 



12. P. Wingatense 



13. P. mutabile 



6. P. pulcherripes 



7. P. niurinum 



8. P. pulcherrimum 



9. P. Bilgramii 



14. P. roseiim 



15. P. Newtoni 



16. P. psittacinum 



17. P. viride 



18. P. rigidiim 



19. P. polycephalum 



20. P. flavicomuni 



21. P. gal he urn 



22. P. ohlatuw 



23. P. albescens 



24. P. penetrale 



