— 26o — 



Médiate corrélation. — Homotyposis. 

 Variation and the germ-plasm. 

 Variation of chromosomes corresponding to variation of some. 



Variation in relation to its causes. 

 Extrinsic causes of variation. 

 Geographical and clematic. — Water. — Food. Solutions. — Qravity. — Heat. - 

 Light. — Electricity. — Other agents. 

 Intrinsic causes of variation. 



Hybridization. — Crafting. — Mutation. 



Variation of particular characters. 

 General laws. 



Varietal vs. spécifie characters. 

 New vs. old characters. 

 Secondary sexual characters. 

 Variation in characters of wide ranging species. 

 Variation in respect to sexual dimorphism. 

 Variation in respect to polymorphism. 

 Secular variation and periodicity. 

 Natural sélection, and other methods of adjustment. 

 Variation and sexual sélection. 

 Degeneration, retrogressive variation. 

 Variation in particular groups of plants. 

 Heredity. 



Reproduction. 



Philosophy, terminology, etc. 



Spontaneous génération and the origin of life. — Artificial protoplasm. 



Végétative propagation. 



Fission and fragmentation. — Budding (unicellular). — Qemmae, bulbils, brood- 

 organs. — Bulbs, tubers, vvinterbuds (as of Protamogeton), etc. — Offsets, 

 runners, etc. — Shedding of branches or other parts. — Végétative repro- 

 duction in particular species. — Others means of végétative reproduction. 

 Physiology and interprétations regarding the clematic history of the earth. 

 EmbryoUogy and morphology of fossil plants. 

 Anatomy. 



Stratigraphie, paleobotany of particular géologie formations a and âges. 

 Eozoic. 



Paleozoic: Cambrian. — Silurian. — Devonian. — Carboniferous. 

 Cenozoic: Triassic. — Jurassic. — Cretaceous. 

 Neozoic: Tertiary. — Quaternary. — Modem. 

 Remains of particular systematic groups. 

 Succession of dominant groups. Discussions of philogeny and évolution from 

 paleobotanical data. — Thallophyta. — Bryophyta. — Pteridophyta. — Sper- 

 maphyta : Pteridospermae ; Gymnospermae ; Angiospermae. 

 Problematical material of unknown relationship. 



