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ii6 ZYGNEMATACEAE pahidosa G. S. West 1899 parvttla Hassall 1843 3 pawhusl{ae Taft 1934 58 pectosa Transeau 1934 51 poinciana Transeau 19^4 62 proditcta G. S. West 1907 78 prona Transeau 1926 93 pulchella Wittrock 1871 37 punctata Wittrock 1867 84 quadran gidata Hassall 1843 85 rava Transeau 1944 95 recurva (Hassall) de Toni 1889 8 regellii Skuja 1937 79 reinschii Transeau 1934 13 robusta (de Bary) Wittrock 1885 39 rotundangulata Jao 1935 83 sanjordiana Tiffany 1934 scalaris Hassall 1842 15 seminoleana Tiffany 1934 59 sinensis Li 1933 26 sphaerocarpa Wolle 1887 14 subcrassa G. S. West 1909 22 subpaludosa Ley 1944 96 sumatrana Schmidle 1895 31 talyschensis (Woronichin) Czurda 1932 32 tenerriina G. S. West 1914 89 tenuissima (de Bary) Czurda 1932 thylespora Skuja 1929 67 transeaui Collins 1912 60 tropica (W. & G. S. West) Transeau 1926 90 tubifera Tiffany 1934 tumidula Transeau 1914 uberosperma W. & G. S. West 1897 varians (Wittrock) Czurda 1932 44 ventricosa (Wittrock) Collins 1912 92 victoriensis G. S. West 1909 7 vircscens (Hassall) Borge 191 3 82 viridis (Kiitzing) Wittrock 1872 77 86 42 2 4 80 68
CHAPTER TEN THE GENUS TEMNOGAMETUM W. & G. S. WEST 1897 The vegetative cells and filaments of the species resemble those of Mougeotia. The cells are cylindric, five to twenty-five diameters long, each with a single axile platelike chromatophore. The pyrenoids are arranged either several in a single row, or are numerous and scattered. The cell sap in 2 of the species is purple. The behavior during reproduction is very different from that of the species of Mougeotia. The gametangia are short specialized cells formed at the ends of scattered vegetative cells. They are one to two diameters long and are gorged with starch and other food substances. In scalariform conjugation the adherent sides of two gametangia become distended and a hole develops within the ring of contact. These connecting walls widen and become the lateral walls of the quadrangular sporangium. Note that dis- tinct conjugating tubes are not formed as in Mougeotia. In lateral conjugation, two adjoining gametangia of the same filament enlarge most at the separation wall, and the wall gradually dis- appears. The gametes unite and the zygospore is obliquely spindle-shaped. Aplanospores and parthenospores may be formed from the reproductive cells. Only 4 species have been found—all within the tropics. Key to the Species of TEMNOGAMETUM I. Chromatophores with pyrenoids in a row 2 I, Chromatophores with scattered pyrenoids 4. T. thaxteri 2. Cell diameter io-12/x, zygospores (lateral conjugation) 20-40 ju, x 40- 60 ju. I . T. tileanum 2. Cell diameter 14-17/A, zygospores (lateral conjugation) 20-26 /a x 61- 67^0, 2, T. heterosporum 2. Cell diameter 14-20 /a, zygospores (lateral conjugation) 35-42 /a x 80- 100 ju, 3. T. transeaui 117
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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
Page 85 and 86: ZYGOGONIUM 65 3. Zygospores 15-26/U
Page 87 and 88: ZYGOGONIUM 67 ospores ellipsoid to
Page 89: ZYGOGONIUM 69 14. Zygogonium stephe
Page 93 and 94: CHAPTER SEVEN THE GENUS MOUGEOTIOPS
Page 95 and 96: CHAPTER RIGHT THE GENUS DEBARYA WIT
Page 97 and 98: DEBARYA 77 3. Debarya ackleyana Tra
Page 99 and 100: CHAPTER NINE THE GENUS MOUGEOTIA C.
Page 101 and 102: MOUGEOTIA 8i not be cited as proof
Page 103 and 104: 7. Spores globose to ovoid, variabl
Page 105 and 106: MOUGEOTIA 85 30. Spores ovoid 40-54
Page 107 and 108: MOUGEOTIA 87 52. Zygosporangia regu
Page 109 and 110: MOUGEOTIA 89 74. Spore wall smooth
Page 111 and 112: 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: MOUGEOTIA 115 craterophora Bohlin 1
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 and 164: 115. Diameter vegetative cells 130-
Page 165 and 166: SPIROGYRA 145 133. Reproducing by a
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
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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
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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
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PLATE XXXVIII 321
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PLATE XXXIX 323
Page 345 and 346:
PLATE XL 325
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PLATE XLI 327
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