. Botany of the southern states. In two parts. Botany. STIPULES AND TENDRILS. 61 which are called stipules. (Fig. 93.) Stipules frequently fall off upon the development of the leaf, when they are called cadu- cous ; at other times they remain as long as the leaf, and are called persistent. In the former case they are attached only by their base to the stem; in the latter, they are connected with the petiole and fall only with it. In opposite leaved plants, the stipules corresponding to the two leaves are generally united, forming but two stipules instead of four. The Hop affords an example of
. Botany of the southern states. In two parts. Botany. STIPULES AND TENDRILS. 61 which are called stipules. (Fig. 93.) Stipules frequently fall off upon the development of the leaf, when they are called cadu- cous ; at other times they remain as long as the leaf, and are called persistent. In the former case they are attached only by their base to the stem; in the latter, they are connected with the petiole and fall only with it. In opposite leaved plants, the stipules corresponding to the two leaves are generally united, forming but two stipules instead of four. The Hop affords an example of this kind. The stipules are in many respects analogous to leaves, and even have buds in their axils, as in the Peach, and in some instances are very much like them in appearance, as in the Pea. In others, they bear no resemblance to the leaves, but are simple membranous append- ages, as in the Hickory, or fine bristles, as in the Cherry. They assume a great variety of appearances, by various modifi- cations of structure and attachment. In the Rose, they are attached to the petiole, forming a leaf-like margin to that organ. In the Polygonum and Rhubarb, they form a sheath round the stem by the union of their edges, and are then called ochrejs. In some plants, they become hardened and conical, and form spines. In climbing plants, they often lengthen into a slender thread-like appendage, and become the organ by which the plant attaches itself to objects over which it climbs; thus forming for the plant the means of support. But, how- ever various may be their appearances, and however unlike in structure, yet if they originate from the base of a leaf, they are stipules. Fig. 93. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darby, John, 1804-1877. [from old catalog]. New York, A. S. Barnes & co.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbotany, bookyear1866
