528 
INDEX TO VOLUME VIII 
Cruciferae, 330; food plants of, 329 
Cucurbit mildew, 316 
Cucurbitaceae, food plants of, 329; stylar 
canal of, 475 
Cyanophyceae, i 
Cyathus Poeppigii, 282 
Cycadella wyomingensis, 225 
Cycadeoidea colossalis, 225; dacotensis, 224; 
Dartoni, 222; Fisherae, 221; ingens, 222; 
marshiana, 225; marylandica, 221; Mas- 
seiana, 221; nigra, 221; Reichenbachiana, 
224; Stantoni, 221; Stilwelli, 22^; Uddeni, 
227 
Cycadeoids, monocarpy and pseudomono- 
carpy in the, 218 
Cyclamen, 33, 34 
Cypress, pollen of, 479 
Cypripedium, 248 
Cyrtanthus parviflorus, embryogeny of, 
502; sanguineus, 502 
Cystococcus, 25, 26 
Daisy, pollen of, 483 
Danaea, 308; elliptica, 310; Jamaicensis, 
310; simplicifolia, 304 
Dandelion, pollen of, 483 
Dasylirion, 199 
Date palm, pollen of, 474 
Dickson, James Geere. The relation of 
certain nutritive elements to the compo- 
sition of the oat plant, 256 
Dietelia, 449 
Disella hederacea, 200; lepidota, 198; sagit- 
taefolia, 200 
Dock, pollen of, 477 
Dunn, Grace A, Note on the histology of 
grain roots, 207 
Durham, G. B. (See J. Arthur Harris, 63, 
339, 375, 425) 
Ebenaceae, 330 
Ehretia elliptica, 194 
Elm, pollen tubes of, 474 
Elodea, respiration and antagonism in, 458; 
canadensis, 458 
Embryogeny of Cyrtanthus parviflorus 
Baker, 502 
Emerson, R. A. Genetic evidence of aber- 
rant chromosome behavior in maize endo- 
sperm, 41 1 
Enckea, 212 
Ensign, M. R. Area of vein-islets in leaves 
of certain plants as an age determinant, 
433 
Enzymes, pollen, 471 
Ephedra trifurca, fertilization of, 476 
Equisetum, 289 
Eragrostis, 193 
Ergots, 319 
Erianthus, 48; divaricatus, 48 
Ericaceae, 331 
Eryngium campestre, 31 
Erysiphe graminis on wheat and barley, 523 
Eucharis, pollen of, 472 
Eurotium, 123; oryzae, 124; repens, 125 
Eusporangiate ferns and the stelar theory, 
303 
Fagaceae, 330 
Fagus caroliniana, leaves of, 433 
Ficus elastica, crown gall on, 515 
Filicineae, 303 
Fixation of free nitrogen by green plants, 
the, I 
Flag smut of wheat, 316, 319 
Floral anatomy of the Urticales, 386 
Fouquiera splendens, 199 
Fraxinaceae, 331 
Fucus, 289 
Furcraea americana, 219 
Gay aides crispum, 197 
Genetic evidence of aberrant chromosome 
behavior in maize endosperm, 411 
Geraniales, 405 
Gericke, W. F. Influence of temperature 
on the relations between nutrient salt 
proportions and the early growth of 
wheat, 59 
GiNSBURQ, S. (See L. Knudson, 164) 
Gladiolus, pollen of, 472 
Gleditsia and related genera, thick-walled 
root hairs of, 171 
Gleditsia triacanthos, 171, 173; var. inermis, 
174 
Gleichenia, 312, 313 
Godetia, 144 
Goldenrod pollen, 477 
Grains, losses from disease, 315 
Gramineae 328 
Grape anthracnose, 316; black-rot, 316; 
downy mildew, 316 
Growing plants, a simple method for, 176 
Growth of Aspergillus niger, effect of salt 
proportions and concentration on the, 
147 
Gymnocladus dioica, 173, 174, 175 
Gymnosporangium, 319 
