SYNOPSIS OF MYCETOZOA 183 



P 



* Sporangia scattered, forming plasmodiocarps — 



Plasmodiocarps sinuous, muriform, white; spores marked 

 with strong ridges and spines, brownish purple 



m 



Plasmodiocarps sinuous, muriform, white or buff, inner 

 wall fragile, colourless ; spores purple-brown, 

 spinulose ......... V. bivalve Pers. 



Plasmodiocarps sinuous, buff or brown, marked with pale 

 lines of dehiscence ; spores pale brownish violet, 

 nearly smooth 



P. bogoriense Kacib. (11, pp. 117, 122*). 



Plasmodiocarps white, usually compressed, inner wall 

 purplish, persistent ; spores dark purplish brown, 



Diderma 



** Sporangia crowded, reniform or subglobse 



Spores dark, rough, 10-14 /x . . P. contextum 

 Spores pale, nearly smooth, 8-10 /i 



P. conglomeration 



b. Lime-knots yellow, red, or brown 



Plasmodiocarps and large branching lime-knots yellow 



P. Serpula Morg. (23, p. 101). 

 Plasmodiocarps and lime knots brown 



P. seneum R. Fr. (3, p. 62 ; & 11, p. 117*), 



Sporangia red or brownish buff; lime-knots large, angular, 

 orange-red or red-brown . P. rubiginosum Fr. 



Sporangia red ; lime-knots rounded, yellow, with usually 

 red centres ....... P. inaequale Peck 



Sporangia yellow or orange ; lime-knots angular, yellow 



P. virescens Ditm. 



4. Physarella Peck. Sporangia stipitate, shortly cylindrical, per- 



forated from above by a deep umbilicus ; capillitium of delicate 

 threads with minute fusiform lime-knots and stout spine-like 

 processes densely charged with lime granules springing per- 

 pendicularly from the sporangium-wall . P, mirabilis Peck 



5. Trichamphora Junghuhn. Sporangia discoid or saucer-shaped, 



stipitate ; stalk red-brown ; sporangium-wall membranous, 

 with evenly distributed deposits of lime granules ; capillitium 

 consisting of colourless branching threads with many or few 

 lime-knots, or of membranous tubes filled with lime through- 

 out, or without lime T, pezizoidea Jungh. 



6. Erionema Penzig. Sporangia forming long cylindrical branched 



plasmodiocarps, or stalked and drooping, bright yellow ; capil- 

 litium a close elastic network of slender colourless threads 

 with few small yellow lime- knots 



E. aureum Penz. (23, p. 36 ; & 17, p. 98*). 



