206 BOTANICAL GAZETTE. 



laboratory work in both the elementary and advanced classes is ac- 

 companied with lectures twice a week upon topics similar to the 

 following: 



Structure of, and useful plants in, Polypetalous, Monopetal- 

 ous and Apetalous divisions. 



Same in regard to Gymnosperms. 



Morphology of Bracts, and an examination of inflorescence. 



Morphology of calyx, corolla, stamens, carpels, ovules, seeds 

 and fruits. 



Movements in plants. 



General laws of adaptation in the vegetable world. 



Plants of former times. 



Plants of extremes of climate. 



Plants of the temperate zones. 



General laws ot plant distribution. 



Relation of plant structure to functions. 



Relation of plants to water; percentage of water in composi- 

 tion; root absorption; absorption by other parts: transpiration 

 and its results: selection of dissolved salts and their appropriation 

 by the plants. 



Soil, its physical and chemical structure. 



Relation of plants to the atmosphere; gaseous absorption; 

 transfer of gases in plants. 



Assimilation; structure of the leaf; chlorophyll, its proper- 

 ties; relation to light; products of assimilation; effects on the air; 

 storing up of elaborated products. 



Metastasis; changes which elaborated products undergo in the 

 plant. 



Production of active principles: relations of this to heat. 



Respiration in plants. 



Nitrogenous food; insectivorous plants. 



Phenomena of growth. 



Laws of growth. 



Movements; autonomic; following shocks; associated with 

 growth. 



Buds and their transfer. 



Fertilization in gymnosperms. 



Fertilization in angiosperms; color, fragrance, etc., in flowers. 



Fertilization; close, cross and hybridization. — J. Troop. 



Remarks on Dentaria as a Subgenus of Cardamine. 



Bentham and Hooker in their "Genera PlantarunT have unit- 

 ed Dentaria with Cardamine, arranging the species of the former 

 as a subgenus under the latter. This, with our species, was done 

 by Alphonso Wood in his ''Botanist and Florist" in 1870. and he is 

 credited with the names under Cardamine. 



The only differences between the two genera, at least so far as 



