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Updated: May 2, 2025
What part grows first? What becomes of the seed-covering? What appears between the first pair of leaves? Was this to be seen in the seed? How many leaves are there at each joint of stem after the first pair? How do they differ from the first pair? What are the parts of the seed? What is there in the Morning-Glory seed that this has not? How do the first leaves change as the seedling grows?
Vertical section, dividing the embryo, a, caulicle: b, cotyledon; c, plumule. 3. Monocotyledons. These are more difficult. Perhaps it is not worth while to attempt to make the pupils see the embryo in Wheat and Oats. But the embryo of Indian Corn is larger and can be easily examined after long soaking. Removing the seed-covering, we find the greater part of the seed to be albumen.
Apart from this, botanists are generally agreed that the concrescence of parts of the flower-whorls in the gynaeceum as the seed-covering, and in the corolla as the seat of attraction, more than in the androecium and the calyx is an indication of advance, as is also the concrescence that gives the condition of epigyny.
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