SUBJECT INDEX 



451 



Cocos, 33 



Coffea, 33 



Coleus, 1.30 



Color in flowers: effects of carbon dioxide, 403 



Color in hydrangea: acidity of soil, aluminum, iron 



effects, 423-424 

 Comespenna, 30 



Composts: improved by addition of peats, 425 

 Constant^condition rooms: for studying effect on 



grow-th of plants, 2S6-290 

 Convallaria majalis: dormancy and germination of 



seeds, 120-123 

 Convolvulus, 35 



Copper: in Bordeaux mixture solubilized by fun- 

 gus spores, 368-369 

 Copper fungicides: action, 366-369 

 Coral-berry: (See Sijmphoricarpos orbiculatiis) 

 Corethra larvae: effects on nerves, muscles and hy- 



podermis by insecticides, 348-350 

 Cornus, 90, 419 

 Cornus ca7iadensis, 112 

 Cotoneaster : 106 



after-ripening, dormancv, germination of seeds, 



111 

 Cotoneaster acutifolia. 111 

 Cotoneaster apiculata. 111 

 Cotoneaster Dielsiana, 111 

 Cotoneaster divaricata, 111, 112 

 Cotoneaster horizontalis, 111, 112 

 Cotoneaster lucida. 111 

 Cotoneaster Zabelii, 111 

 Cotton: (See Gossypium hirsutum) 

 Crassula arborescens, 148, 150, 151 

 Crassula rubicunda: 337, 340 



low temperature effects on dormancy of buds, 230 

 Crataegus: 89, 90, 92, 96, 97, 106 



after-ripening, dormancy, germination of seeds, 



109-111 

 Crataegus arnoldiana , 111 

 Crataegus carrierei, 111 

 Crataegus coccinea, 109 

 Crataegus cordata, 109 

 Crataegus Crus-gaUi, 109, 112, 1.30 

 Crataegus flara, 109, 110, 112 

 Crataegus mollis. 111 

 Crataegus Oxyacantha, 112 

 Crataegus punctata, 109, 112 

 Crataegus rotundifolia, 109, 110, 112 

 Crataegus sanguinea. 111 

 Crataegus tomentosa. 111 

 Crepis tectorum, 62 

 Cucurbita, 79 

 Culex Quinquefasciatus: larvae as test objects for 



insecticides, 354 

 Cumulative error terms: in fungicide tests, 379 

 Cunniiigliamella blakesleeana: vahie in detecting 



phosphorus and nitrogen deficiencies in soils, 



428 

 Cupressus, 90 

 Cuscuta, 3.5 



Cyanamide: effect on composts, 425 

 Cynoglossum, 43 

 Cyperus, 35 

 Cytisus, 29, 30, 31 



Dahlia: 11 



mosaic diseases, 433 



Dandelion: effect of storage on seeds, 57 



Datura, 35, 40, 43, G2 



Daucus, 40 



Day-length, effect on flowering: constant-condition 

 rooms for study, 286-290 



Delphinium: effects of storage on seeds, 56-57 



Deutzia, 245 

 » Diagnosis of tree and shrub injury by artificial il- 

 luminating gas, 178-179 



Diehloroethyl ether, /S,/3'-: fumigation, 353, 356-3.57 

 Dichloroethylene: effects on dormant potato tubers, 



233-234 

 2,4-Dichlorophenoxyacetic acid, 209, 218 

 2,5-Dichlorophenoxyacetic acid, 218, 222 

 a-f2,4-Dichlorophenoxy)-n-butyric acid, 209, 218 

 a-(2,4-Dichlorophenoxy)-propionic acid, 209, 218 

 Dictamnus, 90 



Digitalis, 42, 307, 323, 336, 339 

 Digitalis purpurea: light, low temperature effects on 



flowering. 334-337 

 2,4-Diiodobenzoic acid, 223 

 3,.5-Diiodobenzoic acid, 223 

 2,4-Dimethylphenoxyacetic acid, 222 

 3,4-Dimethylphenoxyacetic acid, 218, 222 

 3,5-Dimethylphenoxyacetic acid, 222 

 o:-(2,4-Dimethylphenoxj-)-n-butyric acid, 222 

 a-(2,5-Dimethylphenoxy)-«-butyric acid, 218, 222 

 a-(3,4-Dimethylphenoxy)-n-butyric acid, 222 

 a-(3,5-Dimethylphenoxy)-n-butyric acid, 222 

 /3-(3,.5-Dimethylphenoxy)-n-butyric acid, 222 

 a-(3,5-Dimethylphenoxy)-malonic acid, 222 

 a-(2,4-Dimethylphenoxy)-propionic acid, 222 

 a-(2,5-Dimethylphenoxy)-propionic acid, 218, 222 

 a-(3,4-Dimethylphenoxy)-propionic acid, 218, 222 

 a-(3,5-Dimethylphenoxy)-propionic acid, 222 

 Dioclea, 29 

 Diospyros, 90 

 Diurnal changes in leaves: 408-412 



comparison of methods of computing, 410-411 

 Dormancy: chemical treatments for shortening rest 

 period of deciduous trees and shrubs, 243- 

 246 

 effects of carbon dioxide on potato tubers, 400 

 effects of ethylene chlorohydrin on lilac buds, 245 

 in potato buds, 2.50-251 

 Dormancy in buds: 230-2,50 



low temperature effects, 230 

 Dormancy in gladiolus: respiration rate, 39 



temperature effects, 41 

 Dormancy in gladiolus cormels: effects of ethylene 



chlorohydrin, 241-243 

 Dormancy in gladiolus corms: as affected by ethyl- 

 ene chlorohydrin, temperature, 241 



effects of ethjlene chlorohydrin, 240 



maintenance, 241 

 Dormancy in imbibed seeds: causes, 43—45 

 Dormancy in lily bulbs: effects of oxygen, 431 



effects of temperature, 431 

 Dormancy in potato buds: 230-240 



effects of methyl ester of a-naphthaleneacetic 

 acid vapor, 239-240 



effects of oxygen, 230-231 



metabolic changes induced by chemicals, 246 



use of anesthetics, 230 

 Dormancy in potato tubers: as affected by gluta- 

 thione, 251-2.52 



chemical effects, 231-238 



growth substances effects, 231-238 



sulphur compounds effects, 234 



thiourea effects, 234-235 

 Dormancy in seeds: 67-132 



advantage to man, 68-70 



after-ripening in dry storage, 123-127 



Amaranthus retrojlexus, 127-128 



Arceuthobium oxycedri, 123 



Calochortus macrocarpus, 127 



Camassia Leichtlinii, 127 



Caulophyllum thalictroides, 120-121 



chemicals as forcing agents, 131 



Convallaria majalis, 120-123 



Cotoneaster, 111 



Crataegus, 109-111 



dormant embryos, 86-101 



drving effects, 32 



epicotyl, 113-119 



