SPIROGYRA 14 T 



loi. Fertile cells cylindric, chromato- 



phores 6-7 144. S. ghosei 



101. Fertile cells enlarged or inflated, chromatophores 3-8 102 



102. Diameter vegetative cells less than 85 /x 103 



102. Diameter vegetative cells more than 85 /^ 104 



103. Vegetative cell diameter 54-60 /a, 



chromatophores 3-4 i34- '^- ajricana 



103. Vegetative cell diameter 56-71 a^, 



chromatophores 3-5 iji- '^^ brunnea 



103. Vegetative cell diameter 66-72/^, 



chromatophores 6-8 147. 5. echinospora 



103. Vegetative cell diameter 70-85 /-i, 



chromatophores 5-8 14S. S. diluta 



104. Median spore wall echinate, chro- 

 matophores 4-7 149. S. echinata 



104. Median spore wall reticulate, 



chromatophores 4-6 150. S. reinhardii 



104. Median spore wall reticulate- 



echinate, chromatophores 8-10.. 151. S.hunanensis 



SPORES LATERALLY COMPRESSED 

 CHROMATOPHORES, TWO OR MORE 



105. Spores compressed-ellipsoid, 120-140/^ 



X 145-255 ^t 175. S. crassoidea 



105. Spores compressed-ovoid 106 



105. Spores compressed-spheroid (lenticular) 108 



106. Median spore wall smooth, chro- 

 matophores 8-9 165. S. jassiensis 



106. Median spore wall pitted 107 



106. Median spore wall verrucose, 



chromatophores 11-16 176. S. rectispira 



107. Diameter vegetative cells 80-95 /a, 



chromatophores 6-12 164. S. formosa 



107. Diameter vegetative cells 140-165/1, 



chromatophores 6-12 167. S. crassa 



108. Median spore wall smooth 109 



108. Median spore wall variously ornamented 112 



109. Diameter vegetative cells less than 50 /a, chromatophores 2-4 no 

 109. Diameter vegetative cells more than 50/1, chromatophores 



3-10 Ill 



no. Vegetative cell diameter 22-24 /t, 



chromatophores 2-4 154. 5. sinensis 



