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3IO ZYCJNHMA'rACEAH PLATl'. XXXIII Spirocvra Fic. I. S. crassoidea, two views of zygospore from Illinois. Figs. 2-4. —5. hydrodictya, zygospores and gametangia after scalariform conjugation; early stage in lateral conjugation. Note unusual thickness of the tuhe walls. Specimen from Coffeen, Illinois. Fig. 5. S. texensis, gametangia and zygospore from Karnac, Texas. After Taft. Fig. 6. S. lushanensis, zygospores and gametangia from China. After Li. Figs. 7-8. S. sirogonioides, scalariform and lateral conjugation with resulting zygospores from Charleston, Nova Scotia. After Hughes. Fig. 9. S. taylorii, gametangia and zygospores from Massachusetts. After Jao. Figs, io-ii.—5. liana, lateral and scalariform conjugation and zygospores from China. Figs. 12-13.—'^- collinili, zygospores formed by lateral and scalariform conjugation from Mississippi. Fig. 14.—5. chenii, lateral and scalariform conjugation, zygospores, and sterile cell from Szcchwan, China. After Jao.
PLATE XXXIII 311
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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
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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
Page 279 and 280: PLATE VII 259
Page 281 and 282: PLATE VIII 261
Page 283 and 284: PLATE IX 263
Page 285 and 286: PLATE X 265 '^=S
Page 287 and 288: PLATE XI 267
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: PLATE XXXII 309
Page 333 and 334: PLATE XXXIV 313
Page 335 and 336: PLATE XXXV 315
Page 337 and 338: 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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