. The elements of botany for beginners and for schools. Plants. 110 OVULES. [SECTION 11. Section XL 317. Ovule (from the Latin, meaning a little egg) is the technical name of that which in the flower answers to and becomes the seed. 318. Ovules are naked in gymnospermous plants (as just described); in all others they are enclosed in the ovary. They may be produced along the whole length of the cell or cells of the ovary, and then they are apt to be numerous; or only from some part of it, generally the top or the bottom. In this case they are usually few or single (solitary, as in Fig.
. The elements of botany for beginners and for schools. Plants. 110 OVULES. [SECTION 11. Section XL 317. Ovule (from the Latin, meaning a little egg) is the technical name of that which in the flower answers to and becomes the seed. 318. Ovules are naked in gymnospermous plants (as just described); in all others they are enclosed in the ovary. They may be produced along the whole length of the cell or cells of the ovary, and then they are apt to be numerous; or only from some part of it, generally the top or the bottom. In this case they are usually few or single (solitary, as in Fig. 34-1-343). They may be sessile, i. e. without stalk, or they may be attached by a distinct stalk, the Funicle or Funiculus (Fig. 340). 319. Considered as to their position and direction in the ovary, they are Horizontal, when they are neither turned upward nor downward, as in Podophyllum (Fig. 326); Ascending, when rising obliquely upwards, usually from the side of the cell, not from its very base, as in the But- tercup (Fig. 341), and the Purslane (Fig. 272); Erect, when rising upright from the very base of the cell, as in the Buck- wheat; (Fig. 342); Pendulous, when hauging from the side or from near the top, as in the Flax (Fig. 270); and Suspended, when hanging perpendicularly from the very summit of the cell, as in the Anemone (Fig. 343). All these terms equally apply to seeds. 320. In structure an ovule is a pulpy mass of tissue, usually with one or two coats or coverings. The following parts are to be noted ; viz : — Kernel or Nucleus, the body of the ovule. In the Mistletoe and some related plants, there is only this nucleus, the coats being wanting. Teguments, or coats, sometimes only one, more commonly two. When two, one has been called Primine, the other Secundine. It will serve all purposes to call them simply outer and inner ovule-coats. Orifice, or Foramen, an opening through the coats at the organic apex of the ovule. In the seed it is Micropt/le. Ciialaza, th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplants, bookyear1887
