88 ZYGNEMATACEAE 



66. Zygospores colorless, finely punc- 

 tate, with an outer ring thickening 



on the produced angles 78. M. prodiicta 



66. Zygospores yellow to yellow-brown, 



punctate Gy. M. thylespora 



67. Spore angles truncate, colorless, punc- 

 tate 85, A/. qitaJrangulata 



67. Spore angles retuse, coarsely punctate, 



yellow 84. M, punctata 



67. Spore angles rounded, coarsely punc- 

 tate, yellow-brown 81. M. austriaca 



67. Spores irregular quadrate-ovoid, only 

 the inner wall punctate, outer wall yel- 

 low-brown, thick and smooth 79. A/. regelUi 



67. Spores tumid-quadrangular, coarsely 



punctate, colorless 83. A/, rotundangulata 



68. Zygospores ovoid-globose, 36-46 yn 



in diameter 87. A/, aspera 



68. Zygospores irregular quadrate, long 



rounded processes yo. M. irregularis 



68. Zygospores quadrangular-ovoid, in- 

 wardly granulose 71. A/, granulosa 



REPRODUCTION USUALLY OR OCCASIONALLY BY 

 APLANOSPORIC FILAMENTS 



69. Diameter vegetative cells less than 8/^1 70 



69. Diameter vegetative cells 8-15)". 74 



69. Diameter vegetative cells more than 15 /^ 78 



70. Aplanospores globose, diameter 



27-30 /A 90. A/, tropica 



70. Aplanospores globose, diameter 



18-20/i. 91. A/, fniamiana 



70. Aplanospores ellipsoid, length 25-32 /x 71 



71 . Spore wall smooth 72 



71. Spore wall minutely punctate 73 



72. Diameter vegetative cells 4-5 m.... 89. M.tencrrima 

 72. Diameter vegetative cells 6-9^1. ... 92. A/, ventricosa 



73. Diameter vegetative cells 4-5 M, sporan- 

 gium wall without pectic layer 75- ^- boodlei 



73. Diameter vegetative cells 6-8 m, pectic 



layer on sporangium wall 91. A/, miamiana 



