466 
INDEX TO VOLUME VII 
Conifers, phylogeny of, 125 
Conocephalum conicum, germination of 
spores in, 458 
Cook, Mel T. (See F. L. Stevens, 305) 
Cordaiteans, origin and relationship of, 162 
Correlation between size of fruit and resis- 
tance of the tomato skin to puncture and 
its relation to infection with Macro- 
sporium tomato Cooke, 78 
Crataegus sp., effect of ringing on, ill 
Cucurbita Pepo, periodicity in rate of growth 
of cells of, 391 
Curtis, Otis F. The upward transloca- 
tion of foods in woody plants. 1. Tissues 
concerned in translocation, loi; II. Is 
there normally an upward transfer of 
storage foods from the roots or trunk to 
the growing shoots? 286 
Cycadeoids, distribution and relationship 
of, 154; size of spores, 163 
Cycads, the living, and the phylogeny of 
seed plants, 146; relation of, 161 
Cycadofilicales, 146 
Cytological phenomena in the cambium, 417 
Cytology and systematic position of Por- 
phyridium cruentum Naegeli, 333 
Daphnia, sex intergrades in, 22 
Disease, and injection of chemicals in 
plants, 2 
Dolerophyllum, size of spores of, 163 
Ellen, Sister M. The germination of 
the spores of Conocephalum conicum, 458 
Embryo development in relation to the 
phylogeny of conifers, 125 
Endothia parasitica, i 
Fagiis grandifolia, effect of ringing on, 113, 
291 
Farlow, William Gilson, life of, 173; por- 
trait of, Plate VIII; publications of, 175 
Friesner, Ray C. Daily rhythms of 
elongation and cell division in roots, 
380 
Functions, modification of vegetative and 
reproductive, under some varying con- 
ditions of metabolism, 409 
Gaunersdorfer, J. (See C. Rumbold, 2) 
Gelatin absorption of moisture in a satur- 
ated atmosphere, 318 
Geographical distribution of Colorado 
plants, 57; .of North Dakota plants, 231 
Germ cells, varying potencies in, 30 
Germination of spores of Conocephalum 
conicum, 458 
Ginkgos, phylogeny of, 149, 164 
Gnetales, polyembryony in, 142 
Goldschmidt, R. (See C. Yampolsky, 21) 
Growth, slow and rapid, 327, 380 
Gymnosperms, size variations of cambial 
initials in, 355 
H+ concentration, relation of, to formation 
of over-growths, 211 
Halsted, Byron David, life of, 305; portrait 
of, Plate XIX; publications of, 306 
Hampton, H. C. (See L. G. M. Baas 
Becking, 261) 
Harvey, R. B., 78; Relation of catalase, 
oxidase, and H+ concentration to the 
formation of over-growths, 211 
Hawkins, L. A., 78. (See J. Rosenbaum, 
78) 
Hermaphroditic flowers 21, 95 
HiGGiNS, B. B. Morphology and life his- 
tory of some Ascomycetes with special 
reference to the presence and function of 
spermatia, 435 
Inheritance of sex intergradation in plants, 
21 
Injection in plants, effect of, on various 
structures, 49 
Invertase, secretion of, by plant roots, 371 
Juniperus communis, 156 
Knudson, L. The secretion of invertase 
by plant roots, 371 
Kraus, E. J. The modification of vegeta- 
tive and reproductive functions under 
some varying conditions of metabolism, 
409 
Lewis, Ivey F., and Conway Zirkle. 
Cytology and systematic position of 
Porphyridium cruentum Naegeli, 333 
Ligustrum ovalifolium, effect of ringing on, 
104, 292 
Limocephalus, intersexes in, 22 
Lithium sulphate, effect of, on plants, 2 
Liverworts, spore germination of, 182 
Longevity of seeds of cereals, clover, and 
timothy, 243 
