244 succica (Spirogyra), XXIII, 7; 159 sulcata (SpiroRvra), XXI\'. 4; 162 sumatrana (Mougcotia), XV, 12: 96 suomiana (Spirogyra), XXXIV, 4; 200 supcrvanans (Spirogyra), XXII, 7: 154 synadclphum (Zygncma), IV, 1-2; 28 szcchwanensis (Spirogyra), XXVIII, 3; 176 taftiana (Spirogyra), XXIV, 8; 163 talguppcnsc (Zygogonium), XI, 7-8; 66 talyschcnsis (Mougcotia), XV, 13; 97 taylorii (Spirogyra), XXXIII, 9; 197 Tcmnogametum, 1 17-1 species of —descriptions, 1 18 -illustrations, XX, i-io -key, 117 tenerriina (Mougcotia), XIX, 30-31; 111 tenuc (Zygncma), IV, 14-15; 32 tenuissima (Mougcotia), XIII, 2; 89 tenuissima (Spirogyra), XXXV, 5-6; 203 tenuius (Sirogonium), 232 teodoresci (Spirogyra), XXI, 8; 153 tcrrcstrc (Zygncma), VII, 16-18; 28 tetrapla (Spirogyra), XXXIX, 4; 218 texcnsis (Spirogyra), XXXIII, 5; 196 thaxteri (Tcmnogametum), XX, 7-9; 118 tholosporum (Zygncma), IV, 13; 32 thylespora (Mougcotia), XVIII, 6-8; 106 tiflFaniana (Zygnemopsis), VIII, 22-23; 54 tjibodensis (Spirogyra), 211 tolosana (Spirogyra), XXXVIII, 3; 214 torta (Spirogyra), XXIX, 10; 182 trachycarpa (Spirogyra), 187 transcaui (Mougcotia), XVII, 19-20; 104 transcaui (Tcmnogametum), XX, 5-6; 118 iranseauiana (Spirogyra), XXXVIII, 10; 215 transeauiana (Zygnemopsis), IX, lo-ii; 56 transcauianum (Zygncma), 35 triplicata (Spirogyra), 174 tropica (Mougcotia), XIX, 2i; 112 tsingtaoensis (Spirogyra), XXXVII, 7; 210 tubcrculata (Spirogyra), 166 tubifcra (Mougcotia), XIII, 6-9; 90 tumida (Spirogyra), XXXVII, 9; 210 tumidula (Mougcotia), XIX, g-iir. 109 turfosa (Spirogyra), XXVI, 17; 171 ubcrosperma (Mougcotia), XVIII, 9-10; 106 ulcanum (Tcmnogametum), XX, 1-4; 118 ZYC^NEMATACEAE unduliscpta (Spirogyra), XXXV, 4; 203 vaginatum (Zygncma), 34 varians (Mougcotia), X\'I, 12; 99 varians (Spirogyra), XXII, i; 153 variformis (Spirogyra), XXI, 9-10; 152 vauchcrii (Zygncma), V, 5; 33 vclata (Spirogyra), XXIV, i; 161 ventcrsicum (Sirogonium), XL, 7; 234 vcntricosa (Mougcotia), XIX, 24; 112 venusta (Spirogyra), XXXVII, 17-18; 212 verrucosa (Spirogyra), XLI, 19; 223 verrucosum (Zygncma), II, lo-ii; 24 vcrruculosa (Spirogyra), XXX, 8-10; 186 victoriensis (Mougcotia), XIII, 18; 91 viresccns (Mougcotia), XIX, 16; 110 viridis (Mougcotia), XIX, 3-4; 109 visenda (Spirogyra), XXXIV, 15; 202 wabashensis (Spirogyra), XXXIV, 13; 201 wangi (Spirogyra), XXXVIII, 14-15; 216 wcberi (Spirogyra), XXXV, 14; 205 weiwitschii (Spirogyra), 170 westii (Spirogyra), 162 woilnyi (Spirogyra), 172 wrightiana (Spirogyra), I, 4-5; XXVII, 7-8; 173 wuchangensis (Zygnemopsis), VIII, 28-29; 55 yunnancnse (Zygncma), 31 yunnanensis (Spirogyra), XXVII, 9; 173 Zygnema, 13-47 species of -descriptions, 22-45 -illustrations, I, 2, 6, 8-9; II-VII; XLI, 6-7; A-E -key, 17-22 -list, 45-47 Zygnemopsis, 49-59 species of —descriptions, 52-58 -illustrations, VIII-IX -key, 50-51 -list. 58-59 Zygogonium, 63-69 species of -ilcscriptions, 65-69 -illustrations, X, 10-19; ^'s ^II> i-u; XLI, 1-5 -key, 64-65 -list, 69
PLATES
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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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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
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PLATE XL 325
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PLATE XLI 327