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266 ZYGNEMATACEAE PLATE XI Zygogonium Figs. 1-3.—Z. pcctositm, zygospores and gametangia, modes of branching, and aplanospore from Louisiana. After Taft. Figs. 4-6.—Z. /uinsgirgii, filaments with aplanospores and spore markings, from India. After Schmidle. Figs. 7-8.—Z. talguppcnsc, sporangia aiul aplanospores from India. After Iyengar. Figs. 9-1 i.—Z. capensc, aplanospores and sporangia, details of spore wall, from Stellenbosch, South Africa. After Hodgetts. Fig. 12.—Z. punctatum , zygospore and elongated gametangia from Louisi- ana. After Taft. Figs. 13-15.—Z. heydrichii, lateral conjugation and zygospores, release of spore through separation of two halves of sporangium wall, and akinete from Sydney, Australia. After Schmidle. Figs. 16-19. Z. \umaoer7se, aplanospores and branching filament from northern India. After Randhawa.
PLATE XI 267
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10 ib
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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
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MOUGEOTIA 93 tending somewhat into
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MOUGEOTIA 95 conjugation scalarifor
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MOUGEOTIA 97 pyrenoids; gametangia
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MOUGEOTIA 99 ous scattered pyrenoid
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MOUGEOTIA loi cylindric, with conca
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MOUGEOTIA 103 56. MouGEOTiA ATUBULO
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MOUGEOTIA 105 aplanospores occupyin
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MOUGEOTIA 107 with hornlike process
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MOUGEOTIA 109 77. MouGEOTiA viRiDis
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MOUGEOTIA III 85. MouGEOTiA QUADRAN
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MOUGEOTIA 113 94. MouGEOTiA MAYORi
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MOUGEOTIA 115 craterophora Bohlin 1
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CHAPTER TEN THE GENUS TEMNOGAMETUM
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CHAPTER ELEVEN THE GENUS SIROCLADIU
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CHAPTER THIRTEEN THE GENUS SPIROGYR
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SPIROGYRA 125 in thickness, and eac
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SPIROGYRA 127 may be widened and ne
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SPIROGYRA 129 Of the 2 species with
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SPIROGYRA 131 II. Most of the spore
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31. Diameter vegetative cells more
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SPIROGYRA 135 END WALLS PLANE (one-
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66. Spores 34-48 i". x 48-54^1 93-
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82. Median spore wall double, outer
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loi. Fertile cells cylindric, chrom
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115. Diameter vegetative cells 130-
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SPIROGYRA 145 133. Reproducing by a
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SPIROGYRA 147 157. Median spore wal
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SPIROGYRA 149 178. Chromatophores i
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SPIROGYRA 151 3. Spirogyra juercens
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SPIROGYRA 153 China, Szechwan. The
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SPIROGYRA 155 matophore; conjugatio
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SPIROGYRA 157 23. Spirogyra affinis
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SPIROGYRA 159 cells to globose, 28-
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SPIROGYRA i6i qucntly misapplied th
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SPIROGYRA 163 scalariform; tubes fo
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SPIROGYRA 165 ellipsoid, ^P-^^i^ x
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Germany; Latvia; Yugoslavia; Finlan
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Coll.). SPIROGYRA 169 Dutch New Gui
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SPIROGYRA 171 formed by both gameta
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SPIROGYRA 173 This imperfectly desc
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SPIROGYRA 175 Vegetative cells 35-4
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SPIROGYRA 177 loi. Spirogyra polyta
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SPIROGYRA 179 formed by both gameta
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SPIROGYRA i8i is thin, brownish and
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SPIROGYRA 183 PI. 8, Figs. 87-88. A
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SPIROGYRA 185 United States: Widely
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SPIROGYRA 187 65-83 /x X 75-1 00 /x
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SPIROGYRA 189 150. Spirogyra reinha
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SPIROGYRA 191 cylindric or slightly
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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
Page 235 and 236: SPIROGYRA 215 244. Spirogyra gratia
Page 237 and 238: SPIROGYRA 217 252. Spirogyra incons
Page 239 and 240: SPIROGYRA 219 iform; tubes formed b
Page 241 and 242: SPIROGYRA 221 zygospores ellipsoid
Page 243 and 244: SPIROGYRA 223 274. Spirogyra verruc
Page 245 and 246: SPIROGYRA 225 elliptica Jao 1935 83
Page 247 and 248: SPIROGYRA 227 mirabilis (Hassall) K
Page 249: SPIROGYRA 229 siibsalina Cedercreut
Page 252 and 253: 232 ZYGNEMATACEAE Usually the matur
Page 254 and 255: 234 ZYGNEMATACEAE cncd and rcilexcd
Page 256 and 257: 236 ZYGNEMATACEAE Figs. H to K. Sir
Page 259 and 260: INDEX Roman numerals refer to plate
Page 261 and 262: grossii (Spirogyra), XXX, 6; 185 Ha
Page 263 and 264: punctiformis (Spirogyra), XXXIV, 5-
Page 265 and 266: PLATES
Page 267 and 268: PLATE 1 247.
Page 269 and 270: PLATE ir 249
Page 271 and 272: PLATE III 251
Page 273 and 274: PLATE IV 253
Page 275 and 276: PLATE V 255
Page 277 and 278: PLATE VI 257
Page 279 and 280: PLATE VII 259
Page 281 and 282: PLATE VIII 261
Page 283 and 284: PLATE IX 263
Page 285: PLATE X 265 '^=S
Page 289 and 290: PLATE XII 269
Page 291 and 292: PLATE XIII 271
Page 293 and 294: PLATE XIV 273
Page 295 and 296: PLATE XV 275
Page 297 and 298: PLATE XVI 277
Page 299 and 300: PLATE XVII 279
Page 301 and 302: PLATE XVIII 281
Page 303 and 304: PLATE XIX 283
Page 305 and 306: PLATE XX 285
Page 307 and 308: PLATE XXI 287
Page 309 and 310: PLATE XXII 289
Page 311 and 312: PLATE XXIII 291
Page 313 and 314: PLATE XXIV 293
Page 315 and 316: PLATE XXV 295
Page 317 and 318: PLATE XXVI 297
Page 319 and 320: PLATE XXVII 299
Page 321 and 322: PLATE XXVIII 301
Page 323 and 324: PLATE XXIX 303
Page 325 and 326: PLATE XXX 305
Page 327 and 328: PLATE XXXI 307
Page 329 and 330: PLATE XXXII 309
Page 331 and 332: PLATE XXXIII 311
Page 333 and 334: PLATE XXXIV 313
Page 335 and 336: PLATE XXXV 315
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PLATE XXXVI 317
Page 339 and 340:
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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