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 Nature  of  gall-producing  stimili. 
 Insect  galls. 
 On  lower  plants. 
 Rootgalls.  -   Stem  galls.  -   Leaf  galls.  —  Galls  on  floral  organs.  -   Galls  made  by  
 particular  insects. 
 Fungus  galls  or  mycodomatia.  Root  tubercles.  Tubers  and  tuberization.  
 Anatomical  studies  of  galls. 
 Galls on particular p lant s . 
 Galls  of  particular  geographical  areas. 
 Teratology. 
 General. 
 Philosophy. 
 Compends,  treatises. 
 Bibliography. 
 Collected  works. 
 Abnormalities  of  particular  plants. 
 Union  of  organs,  cohesion,  adhesion. 
 Abnormal  fusions  of  thalloid  structures. 
 Rhizocollesie  or  rootgrafts. 
 Natural  grafts,  union  of  stems. 
 Gnion  of  leaves,  syncotyls. 
 Apogamy  and  parthenogenesis. 
 Sexual  reproduction. 
 Philosophy,  terminology,  etc. 
 Differentiation  of  sex. 
 Alternation  of  generations. 
 Festilization. 
 Pollination.  - ^  Effets  of  self,  and  cross-fertilization.  Anemophily.  —  Entomo-  
 phily.  —  Adaptations  to  other  agents.  -  Dichogamy.  -   Heterogenous  dimorphism  
 and  trimorphism.  -   Diclinism;  Monoe c ism;  Polygamy.  -   Other  
 means  of  insuring  cross  pollination.  -  Cleistogamy.  -   Other  adaptations  
 to  self-pollination. 
 .Artificial  control  of  pollination,  plant  breeding. 
 Pollination  in  particular  species  or  groups. 
 Other  nuclear  fusions. 
 Sexual  reproduction  in  particular  species. 
 Viviparity. 
 Regeneration. 
 Movement. 
 Physical. 
 Stability,  rigidity.  —  Elasticity,  
 ments.  —  Other  physical  
 Anatomic  movements. 
 Nutation. 
 -  Turgidity.  
 movements. 
 Tensions.  - -   Hygroscopic  move- 
 Tropisms. 
 Philosophy  and  terminology. 
 Oeotropism.  —  Statoliths. 
 Thigmotropism.  --  Tendrils.  Sensitive  plants.  
 Hydrotropism.' 
 Osmotropism  and  chemotropism. 
 Rheotropism. 
 Thermotropism. 
 Heliotropism. 
 Other  tropisms.  —  Sleep  movements. 
 Turgor  movements  . 
 Traps,  trigger  hairs,  etc. 
 Gyrations. 
 Cytoplasmic  movements. 
 Streaming. 
 Rotation. 
 Movement  of  plastids. 
 Locomotion.  —  Amoeboid  movements,  By  cilia,  - -   
 Other  means  of  locomotion. 
 Flagella. 
 Locomotion  in  particular  groups,  e.  g.  Diatoms. 
 Taxies. 
 General.  -  Geotaxy.  —  Thigmotaxy.  —‘  Osmotaxy  and  chemotaxy.  -  Rheotaxy.  
 -  Thermotaxy.  —  Phototaxy.  —  Oalvanotax)'.  --  Other  taxies. 
 Movements  in  particular  species  or  groups. 
 Irritability. 
 Guttation, 
 Glandular  action.  —  Nectar. 
 Pigmentation.  —  Anthocyanotin. 
 Products.  ,  f * '   f 
 Variation  and  heredity. 
 General  on  variation. 
 Philosophy  and  classification  of  subject. 
 Text-books   and  popular  presentations. 
 Methods  of  investigating  variation. 
 Biometric  methods. 
 Aids  to  biometry  and  statistical  methode. 
 Physiological,  embryological  and  cytological  aspects. 
 The  production  of   variations. 
 Variation  and  development. 
 Variation  at  particular  developmental  stages. 
 Variation  and  recapitulation. 
 Correlated  variation. 
 Immediate  correlation. 
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