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88 ZYGNEMATACEAE<br />
66. Zygospores colorless, finely punc-<br />
tate, with an outer ring thickening<br />
on the produced angles 78. M. prodiicta<br />
66. Zygospores yellow to yellow-brown,<br />
punctate Gy. M. thylespora<br />
67. Spore angles truncate, colorless, punc-<br />
tate 85, A/. qitaJrangulata<br />
67. Spore angles retuse, coarsely punctate,<br />
yellow 84. M, punctata<br />
67. Spore angles rounded, coarsely punc-<br />
tate, yellow-brown 81. M. austriaca<br />
67. Spores irregular quadrate-ovoid, only<br />
the inner wall punctate, outer wall yellow-brown,<br />
thick and smooth 79. A/. regelUi<br />
67. Spores tumid-quadrangular, coarsely<br />
punctate, colorless 83. A/, rotundangulata<br />
68. Zygospores ovoid-globose, 36-46 yn<br />
in diameter 87. A/, aspera<br />
68. Zygospores irregular quadrate, long<br />
rounded processes yo. M. irregularis<br />
68. Zygospores quadrangular-ovoid, in-<br />
wardly granulose 71. A/, granulosa<br />
REPRODUCTION USUALLY OR OCCASIONALLY BY<br />
APLANOSPORIC FILAMENTS<br />
69. Diameter vegetative cells less than 8/^1 70<br />
69. Diameter vegetative cells 8-15)". 74<br />
69. Diameter vegetative cells more than 15 /^ 78<br />
70. Aplanospores globose, diameter<br />
27-30 /A 90. A/, tropica<br />
70. Aplanospores globose, diameter<br />
18-20/i. 91. A/, fniamiana<br />
70. Aplanospores ellipsoid, length 25-32 /x 71<br />
71 . Spore wall smooth 72<br />
71. Spore wall minutely punctate 73<br />
72. Diameter vegetative cells 4-5 m.... 89. M.tencrrima<br />
72. Diameter vegetative cells 6-9^1. ... 92. A/, ventricosa<br />
73. Diameter vegetative cells 4-5 M, sporangium<br />
wall without pectic layer 75- ^- boodlei<br />
73. Diameter vegetative cells 6-8 m, pectic<br />
layer on sporangium wall 91. A/, miamiana
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