Temperature and Flower Induction Vernalization

It is sufficiently well known that our winter cereals thrive and bear corn only after they have been subjected to the cold of winter. In 1918, Gassner established that the cold can be effective even during germination. He spoke of a cold requirement, which can also be met by an experimental cold treatment. Experimental cold treatments aimed at flower in- 

In addition to our winter cereals many other winter annuals (page 253) and biennials (two-year plants) are dependent on vernalization. In many cases the biennials form a rosette of leaves which is attached to the soil in the first year with which they pass the winter. In the second year when the days become long enough shoots sprout forth and flowers are formed. 

Let us now compile facts derived from a few more closely investigated plants. 

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