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144 ZYGNEMATACEAE 124. Median spore wall punctate, diameter vegetative cells 27-30 /a. . . 189. S. punctijormis 124. Median spore wall coarsely punctate, diameter vegetative cells 18-22/X 183. S. collinsii 124. Median spore wall coarsely punctate, diameter vegetative cells 13-14/^ 181. 6'. prescottii 125. With I chromatophore (rarely 2 in some cells) 126 125. With 2 or ^ chromatophores (rarely i) in each cell 127 126. Median spore wall smooth, gametangia strongly reflexed 190. S. reflexa 126. Median spore wall punctate 191. 5. micropunctata 126. Median spore wall irregularly reticulate, diameter vegetative cells 27-33 /x 187. S. esthonica 126. Median spore wall scrobiculate . . 188. S.suomiana 127. Spores ellipsoid to ovoid, median wall punctate 1 14. 5". schmidtii 127. Spores ovoid, outer median wall corrugate, inner finely reticulate 192. 6\ corrugata 128. Chromatophore i in each cell 129 128. Chromatophores 2 to 5 in each cell 130 128. Chromatophores 5 to 10 in each cell 131 129. Median spore wall smooth, diameter vegetative cells 40-45 m n)6. S. visenda 129. Median spore wall smooth, diameter vegetative cells 53-56/A 197. S. Iiungarica 129. Median spore wall punctate 193. S. rugulosa 130. Chromatophores 3, median spore wall irregularly corrugate 136. S. grossii 130. Chromatophores 2-4, median spore wall areolatc 194. S. wabashensis 130. Chromatophores 3-5, median spore wall reticulate 178. S. texensis 131. Chromatophores 5, spores ovoid 195. S.conspicua 131. Chromatophores 7-10, spores lentic- ular lyy. S. hydrodictya DIVISION WALLS SEMIREPLICATE 132. An infold extending halfway around the wall and alter- nating in position in adjoining cells 133
SPIROGYRA 145 133. Reproducing by aplanospores 198. S. narcissiana 133. Reproducing by zygospores 199. S. undulisepta DIVISION WALL REPLICATE 134. A circular infold on the end walls of most cells 135 135. Tubes formed by both gametangia 136 135. Tubes apparently formed by the male gametangia 159 136. With I chromatophore in each cell, rarely 2 in some cells 137 136. With usually more than i chromatophore in each cell. 167 REPLICATE END WALLS USUALLY ONE CHROMATOPHORE 137. Fertile cells cylindric or enlarged 138 137. Fertile cells fusiform-inflated 148 137. Fertile cells cylindrically ("quadrately") inflated 158 138. Zygospores ellipsoid 139 138. Zygospores ovoid 143 139. Median spore wall smooth, and outer wall smooth 140 139. Median spore wall smooth, but inner layer of outer wall scrobiculate 236. S. venusta 139. Median spore wall reticulate 222. S. dentireticulata 140. Diameter vegetative cells less than 24 i^, 141 140. Diameter vegetative cells between 24 /x and 40 /^ 142 140. Diameter vegetative cells more than 40 /A 233. S. tjibodensis 141. Zygospores 22-26 (-32) ;u, x 51-103 /a.. 228. S.arta 141. Zygospores 30-36 /a x 55-1 10 /a, some fertile cells inflated 226. S. spreeiana 141. Zygospores 25-35^1 x 48-86 ju, sterile cells inflated 229. S. tumida 142. Zygospores 32-42/1 x 80-122 /a, outer wall thick, lamellate 231. 5". lamellosa 142. Zygospores 30-33/1 x 60-82/1, outer wall thin 232, S. laxa 142. Zygospores 35-46/1 x 61-106/1, usually ovoid 208. S. semiornata 143. Median spore wall smooth, outer also smooth 144 143. Median spore wall smooth, outer wall of 2 layers, of which the inner is transparent, scrobiculate 145 143. Median spore wall granulate, outer wall of 2 thin layers 224. S. microgranulata
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THE ZYGNEMATACEAE
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GRADUATE SCHOOL MONOGRAPHS Contribu
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INTRODUCTION The absence of a moder
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INTRODUCTION ix Illinois State Teac
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Plat€ ILLUSTRATIONS Plates Page I
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THE ZYGNEMATACEAE
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4 ZYGNEMATACEAE gametes is by means
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6 ZYGNEMATACEAE are common but are
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8 ZYGNEMATACEAE between cells, the
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10 ZYGNEMATACEAE sporiferous cells
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12 ZYGNEMATACEAE TABLE I Summary of
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14 ZYGNEMATACEAE In higher latitude
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i6 ZYGNEMATACEAE specimens with mat
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1 ZYGNEMATACEAE II. Spores usually
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20 ZYGNEMATACEAE 32. Diameter veget
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22 ZYGNEMATACEAE REPRODUCTION BY AP
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24 ZYGNEMATACEAE spores formed in t
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26 ZYGNEMATACEAE pitted; pits 5-6 /
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28 ZYGNEMATACEAE spores are formed
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30 ZYGNEMATACEAE spores formed in t
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32 ZYGNEMATACEAE biculate; pits 4.5
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34 ZYGNEMATACEAE United States: Ill
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36 ZYGNEMATACEAE zygospores globose
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38 ZYGNEMATACEAE spores formed in o
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40 ZYGNEMATACEAE spores in one of t
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42 ZYGNEMATACEAE an outer pectic la
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44 ZYGNEMATACEAE irregular in form
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46 ZYGNEMATACEAE cylindncum Transea
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CHAPTER THREE THE GENUS ZYGNEMOPSIS
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ZYGNEMOPSIS 51 6. Median spore wall
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ZYGNEMOPSIS 53 22-25 jLi X 25-30 /"
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ZYGNEMOPSIS 55 12. Zygnemopsis sple
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ZYGNEMOPSIS 57 23-50 Ai, with a mor
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quadrata Jao 1935 ZYGNEMOPSIS 59 si
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CHAPTER FIVE THE GENUS ZYGOGONIUM K
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ZYGOGONIUM 65 3. Zygospores 15-26/U
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ZYGOGONIUM 67 ospores ellipsoid to
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ZYGOGONIUM 69 14. Zygogonium stephe
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CHAPTER SEVEN THE GENUS MOUGEOTIOPS
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CHAPTER RIGHT THE GENUS DEBARYA WIT
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DEBARYA 77 3. Debarya ackleyana Tra
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CHAPTER NINE THE GENUS MOUGEOTIA C.
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MOUGEOTIA 8i not be cited as proof
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7. Spores globose to ovoid, variabl
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MOUGEOTIA 85 30. Spores ovoid 40-54
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MOUGEOTIA 87 52. Zygosporangia regu
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MOUGEOTIA 89 74. Spore wall smooth
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MOUGEOTIA 91 6. MouGEOTiA ELLiPsoiD
Page 113 and 114: MOUGEOTIA 93 tending somewhat into
Page 115 and 116: MOUGEOTIA 95 conjugation scalarifor
Page 117 and 118: MOUGEOTIA 97 pyrenoids; gametangia
Page 119 and 120: MOUGEOTIA 99 ous scattered pyrenoid
Page 121 and 122: MOUGEOTIA loi cylindric, with conca
Page 123 and 124: MOUGEOTIA 103 56. MouGEOTiA ATUBULO
Page 125 and 126: MOUGEOTIA 105 aplanospores occupyin
Page 127 and 128: MOUGEOTIA 107 with hornlike process
Page 129 and 130: MOUGEOTIA 109 77. MouGEOTiA viRiDis
Page 131 and 132: MOUGEOTIA III 85. MouGEOTiA QUADRAN
Page 133 and 134: MOUGEOTIA 113 94. MouGEOTiA MAYORi
Page 135 and 136: MOUGEOTIA 115 craterophora Bohlin 1
Page 137 and 138: CHAPTER TEN THE GENUS TEMNOGAMETUM
Page 139: CHAPTER ELEVEN THE GENUS SIROCLADIU
Page 143 and 144: CHAPTER THIRTEEN THE GENUS SPIROGYR
Page 145 and 146: SPIROGYRA 125 in thickness, and eac
Page 147 and 148: SPIROGYRA 127 may be widened and ne
Page 149 and 150: SPIROGYRA 129 Of the 2 species with
Page 151 and 152: SPIROGYRA 131 II. Most of the spore
Page 153 and 154: 31. Diameter vegetative cells more
Page 155 and 156: SPIROGYRA 135 END WALLS PLANE (one-
Page 157 and 158: 66. Spores 34-48 i". x 48-54^1 93-
Page 159 and 160: 82. Median spore wall double, outer
Page 161 and 162: loi. Fertile cells cylindric, chrom
Page 163: 115. Diameter vegetative cells 130-
Page 167 and 168: SPIROGYRA 147 157. Median spore wal
Page 169 and 170: SPIROGYRA 149 178. Chromatophores i
Page 171 and 172: SPIROGYRA 151 3. Spirogyra juercens
Page 173 and 174: SPIROGYRA 153 China, Szechwan. The
Page 175 and 176: SPIROGYRA 155 matophore; conjugatio
Page 177 and 178: SPIROGYRA 157 23. Spirogyra affinis
Page 179 and 180: SPIROGYRA 159 cells to globose, 28-
Page 181 and 182: SPIROGYRA i6i qucntly misapplied th
Page 183 and 184: SPIROGYRA 163 scalariform; tubes fo
Page 185 and 186: SPIROGYRA 165 ellipsoid, ^P-^^i^ x
Page 187 and 188: Germany; Latvia; Yugoslavia; Finlan
Page 189 and 190: Coll.). SPIROGYRA 169 Dutch New Gui
Page 191 and 192: SPIROGYRA 171 formed by both gameta
Page 193 and 194: SPIROGYRA 173 This imperfectly desc
Page 195 and 196: SPIROGYRA 175 Vegetative cells 35-4
Page 197 and 198: SPIROGYRA 177 loi. Spirogyra polyta
Page 199 and 200: SPIROGYRA 179 formed by both gameta
Page 201 and 202: SPIROGYRA i8i is thin, brownish and
Page 203 and 204: SPIROGYRA 183 PI. 8, Figs. 87-88. A
Page 205 and 206: SPIROGYRA 185 United States: Widely
Page 207 and 208: SPIROGYRA 187 65-83 /x X 75-1 00 /x
Page 209 and 210: SPIROGYRA 189 150. Spirogyra reinha
Page 211 and 212: SPIROGYRA 191 cylindric or slightly
Page 213 and 214: SPIROGYRA 193 by both gametangia; f
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SPIROGYRA 195 although the tubes be
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wall. United States: Texas, Karnac,
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SPIROGYRA 199 found the earlier sta
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SPIROGYRA 201 matophore, making 3 t
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SPIROGYRA 203 199. Spirogyra unduli
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SPIROGYRA 205 United States: Iowa;
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SPIROGYRA 207 spores ellipsoid, 20-
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SPIROGYRA 209 iform; tubes formed b
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SPIROGYRA 211 tubes formed by both
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SPIROGYRA 213 forma gracilior). Czu
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SPIROGYRA 215 244. Spirogyra gratia
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SPIROGYRA 217 252. Spirogyra incons
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SPIROGYRA 219 iform; tubes formed b
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SPIROGYRA 221 zygospores ellipsoid
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SPIROGYRA 223 274. Spirogyra verruc
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SPIROGYRA 225 elliptica Jao 1935 83
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SPIROGYRA 227 mirabilis (Hassall) K
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SPIROGYRA 229 siibsalina Cedercreut
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232 ZYGNEMATACEAE Usually the matur
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234 ZYGNEMATACEAE cncd and rcilexcd
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236 ZYGNEMATACEAE Figs. H to K. Sir
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INDEX Roman numerals refer to plate
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grossii (Spirogyra), XXX, 6; 185 Ha
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punctiformis (Spirogyra), XXXIV, 5-
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PLATES
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PLATE 1 247.
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PLATE ir 249
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PLATE III 251
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PLATE IV 253
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PLATE V 255
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PLATE VI 257
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PLATE VII 259
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PLATE VIII 261
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PLATE IX 263
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PLATE X 265 '^=S
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PLATE XI 267
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PLATE XII 269
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PLATE XIII 271
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PLATE XIV 273
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PLATE XV 275
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PLATE XVI 277
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PLATE XVII 279
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PLATE XVIII 281
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PLATE XIX 283
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PLATE XX 285
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PLATE XXI 287
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PLATE XXII 289
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PLATE XXIII 291
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PLATE XXIV 293
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PLATE XXV 295
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PLATE XXVI 297
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PLATE XXVII 299
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PLATE XXVIII 301
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PLATE XXIX 303
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PLATE XXX 305
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PLATE XXXI 307
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PLATE XXXII 309
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PLATE XXXIII 311
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PLATE XXXIV 313
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PLATE XXXV 315
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PLATE XXXVI 317
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PLATE XXXVII 319
Page 341 and 342:
PLATE XXXVIII 321
Page 343 and 344:
PLATE XXXIX 323
Page 345 and 346:
PLATE XL 325
Page 347:
PLATE XLI 327
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