344 
a 
BOTANICAL GAZETTE [MAY 
Water, amount and quality requisite. 
Light, amount requisite for photosynthetic work, least, best, and most. 
How far carried by stored food, and when its own nutrition begins. 
Adult life: 
Demand for water, and interadjustment of absorption, transfer, and tran- 
spiration. 
Demand for the important minerals. 
Dependence upon mycorhiza or other organic aids. 
Form and size of vegetative parts, and plasticity thereof. 
Temperature demands. 
Light demands. 
Flowering and fruiting (sporification): 
Conditions determining beginning of reproduction. 
Vegetative powers of reproduction. 
Arrangements for uniting the sexes, and extent of dependence thereon. 
Duration of vitality, and the resting period of the seed. 
Dissemination conditions. 
—W. F. Ganone, Smith College, Northampton, Mass. 
