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138 ZYGNEMATACEAE<br />

8i<br />

8i<br />

SPORES NOT LATERALLY COMPRESSED<br />

MEDIAN WALL NOT SMOOTH<br />

75. Diameter vegetative cells between 16 /x and 25 m 76<br />

75. Diameter vegetative cells mostly between 25^ and /u. 35 77<br />

75. Diameter vegetative cells between 35^1 and 60 i^ 84<br />

75. Diameter vegetative cells between 60 /x and 125 /li 96<br />

76. Spores ellipsoid, chromatophores<br />

3, diameter vegetative cells 22-<br />

26/x<br />

76. Spores ovoid, chromatophores 2-<br />

1, diameter vegetative cells 16-<br />

117. S.c/iung/^ingensis<br />

22 /i 108. S. puncticulata<br />

76. Spores ellipsoid, chromatophores<br />

3-2, diameter vegetative cells 20-<br />

25^1<br />

76. Spores ovoid, chromatophores 3-<br />

2, diameter vegetative cells 23-<br />

115. S. miamiana<br />

25 109. S. aeqtiinoctialis<br />

77. Zygospores ovoid 78<br />

77. Zygospores ellipsoid<br />

78. Chromatophores 2, diameter veg-<br />

etative cells 25-32 jtt no. 5. rhizopus<br />

78. Chromatophores 3-2, diameter<br />

vegetative cells 28-32 /^ in. 5. dictyospora<br />

78, Chromatophores 2-4, diameter<br />

vegetative cells 30-37 /a, median<br />

spore wall double 135<br />

78. Chromatophores 1-3, diameter<br />

vegetative cells 31-36 /a 112<br />

78. Chromatophores 3-4, diameter<br />

vegetative cells 30-45 /a i33- "^^ fiuviatilis<br />

79. Diameter spores usually less than 32 /x,<br />

2 chromatophores 1 13. 5. fossa<br />

79. Diameter spores between 32 and 43^1<br />

79. Diameter spores usually more than 43 /u. 81<br />

80. Median spore wall punctate or scrobiculate 82<br />

80. Median spore wall reticulate 83<br />

Chromatophores 2-3 (-4), diameter<br />

S. notabilis<br />

S. natchita<br />

spores 43-46 /x<br />

Chromatophores 3-4, diameter spores<br />

1 14. 5. schmidtii<br />

45-52 M i\G. S. smithii<br />

79<br />

80

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