INDEX TO VOLUME VII 
467 
Lupinus albus, periodicity in rate of growth 
of cells of, 389, 398 
Lymantria dispar, intersexes in, 21 
Macrosporium tomato Cooke, tomato skin 
infected with, 78 
Mercurialis annua, abnormalities in, 21, 95 
Metabolism, modification of vegetative and 
reproductive functions under some vary- 
ing conditions of, 409 
Moisture, absorption of, by gelatin in a 
saturated atmosphere, 318 
Mokrjetsky, C. A. (See C. Rumbold, 3) 
Mycosphaerella BoUeana, 443 
North Dakota plants, geographical distri- 
bution of, 231 
Nucleoli in cambium cells, 428 
Oats, longevity of seeds of, 246 
Ostrya virginiana, effect of ringing on, 115 
Over-growths, relation of catalase, oxidase, 
and H""" concentration to the formation 
of, 211 
Oxidase concentration, relation of, to for- 
mation of over-growths, 211 
Pachypsylla asteriscus, 276; mamma, 276 
Pachypsylla galls, early stages in develop- 
ment of on Celtis, 275 
Palmella cruenta, 334 
Pammel, L. H. (See F. L. Stevens, 305) 
Pandanus, forest of, 156 
Philadelphus pubescens, effect of ringing on, 
102, 107, 292 
Phylogeny of seed plants, 146. (See 
embryo development) 
Pinus, embryogeny of, 125; polyembryony 
in, 127 
Pisum arvense, experiments on secretion of 
invertase by roots of, 373 
Pisum sativum, periodicity in rate of growth 
of cells of, 387, 392 
Plantjcommunities, 62 
Plant injections, history of, I 
Plantago, genus, in Hawaii, 195 
Plantago lanceolata, sex intergrades in, 31 
Plantago princeps, 198, var. Queleniana, 
199, var. elata, 200, var, laxifolia, 201, 
var. hirtella, 202, var. denticulata, 202, 
var. anomala, 203, pi. XIII, , var. 
longibracteata, 203, var, acaulis, 204; 
pachyphylla, 205, var. mauiensis, 205, 
forma mentis eeka, 205, var. hawiiensis, 
206, var. kauaiensis, 206, forma robusta, 
207, forma intermedia, 207, var. pusilla, 
208, var. rotundifolia, 208, forma cras- 
sicaudex, 208, var. glabrifolia, 209, var. 
muscicola, 209; major, 210; lanceolata, 210; 
virginica, 210; Gaudichaudiana, 210 
Plantago Queleniana, 199; Queleana, 203; 
princeps var. aquatilis, 203; Fauriei, 204 
Pleurage curvicolla, spore discharge of, 75 
Polyembryony in relation to the phylogeny 
of conifers, 125 
Porphyridium cruentum, cytology and sys- 
tematic position of, 333 
Potoniea adiantiformis, 163 
Potter, George F. An apparatus for 
automatically changing the temperature 
of a chamber, 39 
Protococcus miniatiis, 333 
Pyrus communis, effect of ringing on, 113, 
287 
Pyrus malus, effect of ringing on, 104,' 109, 
288 
Pythium debaryanum, infection with, on 
potato, 78 
Ramaley, Francis. Subalpine lake-shore 
vegetation in north-central Colorado, 57 
Rankin, W. H. (See C. Rumbold, 5) 
Reed, H. S. Slow and rapid growth, 327 
RiCKETT, H. W. The development of the 
thallus of Sphaerocarpos Donnellii Aust., 
182 
Ringing, effect of on growth of Acer sac- 
charum, 113, 289; Crataegus sp,, in; 
Fagus grandifolia, 113, 291; Ligustrum 
ovalifolium, 104, 292; Ostrya virginiana, 
115; Philadelphus pubescens, 102, 107, 
292; Pyrus communis, 113, 287; Pyrus 
malus, 104, 109, 288 
Rock, Joseph F. The genus Plantago in 
Hawaii, 195 
Roots, secretion of invertase by, 371; cell 
division in, 380 
ROSENBAUM, J., AND ChARLES E. SANDO. 
Correlation between size of the fruit and 
the resistance of the tomato skin to 
puncture and its relation to infection 
with Macrosporium tomato Cooke, 78 
Rumbold, Caroline. Effect on chestnuts 
of substances injected into their trunks, 
45; injection of chemicals into chestnut 
trees, i 
