. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE PIIiENOGAMIA—HOW DEVELOPED. 23 may, in turn, generate buds and branchlets in the axils of their own leaves in like manner. 108. By the continual repetitiok op this simple process the vegetable fabric arises, ever advancing in tlie direction of all its growing points, clothing itself with leaves as it advances, and enlarging the diameter of its axis, until it reachea the limit of existence assigned by its Creator. 109. Th
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE PIIiENOGAMIA—HOW DEVELOPED. 23 may, in turn, generate buds and branchlets in the axils of their own leaves in like manner. 108. By the continual repetitiok op this simple process the vegetable fabric arises, ever advancing in tlie direction of all its growing points, clothing itself with leaves as it advances, and enlarging the diameter of its axis, until it reachea the limit of existence assigned by its Creator. 109. The organs of nutrition. Beared by this process alono the plant cod-' .sists of such organs only as were designed for its own individual nourishment—roots to absorb its food, stem and branches to transmit it, and leaves to digest it. These are called organs of nutrition. But the divine command which caused the tribes of vegetation in their diversified beauty to spring from the earth, required that each plant should have its "seed within itself" fotthe perpetuation of its kind. 110. How THE FLOWER ORIGINATES. In the third stage of vegeta- tion, therefore, a change occurs in the development of some of the buds. The growing point ceases to advance as hitherto, expands its leaves in crowded whorls, each successive whorl undergoing a gradual transfor- mation departing from the original type,—the leaf. Thus, instead of a leafy branch, the ordinary progeny of the bud, a, flower is the result. 111. Nature of the flower. A flower may be considered as a transformed branch, having the leaves crowded together by the non- development of the axis, moulded into more delicate structures, and tinged with more brilliant hues, not only to adorn the face of nature, but to fulfill the important office of 10, PsBony, with eomo of lU petals removed to sliow the stamens and pistils. 11 to 22, the organs, graduated from the leaf to the Please note that these images
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