. Botany for beginners: an introduction to Mrs. Lincoln's Lectures on botany. Plants. Oh. XII.] THE COROLLA. 69 may sometimes find a difficulty in determining whether the co- rolla is in one piece or more; for monopetalous flowers often have deep divisions, extending almost to the base of the corolla; but a corolla must be divided at the base, or be in separate pieces, in order to be considered as polypetalous. It is a good rule to consider the parts into which a corolla naturally falls, as so many petals 277. Monopetalous corollas (see Fig. 44,) consists of the tube, throat, and limb. The tub
. Botany for beginners: an introduction to Mrs. Lincoln's Lectures on botany. Plants. Oh. XII.] THE COROLLA. 69 may sometimes find a difficulty in determining whether the co- rolla is in one piece or more; for monopetalous flowers often have deep divisions, extending almost to the base of the corolla; but a corolla must be divided at the base, or be in separate pieces, in order to be considered as polypetalous. It is a good rule to consider the parts into which a corolla naturally falls, as so many petals 277. Monopetalous corollas (see Fig. 44,) consists of the tube, throat, and limb. The tube, is the lower part, having more or less the form of a tunnel. The throat is the entrance into the tube ; it is either open, or closed by scales or hairs. The limb is the upper border of the corolla. Fig. 43. 278. Polypetalous corollas consist of several petals. Each petal consists of two parts, the Lamina and claw. 279. The lamina, (Fig. 43, a) is the upper and usually thinner part of the pe- tal ; its margin is sometimes entire, or without divisions, as in the Rose; some- times notched, or crenate, as in the Pink. The lamina corresponds to the limb of monopetalous corollas. 280. The claw (Fig. 43,&,) is the lower part of the petal, and inserted upon the receptacle; it is sometimes very short as in the Rose; in the Pink, as seen at Fig. 43, it is long and slender. The claw is analogous to the tube of monopetalous corollas. 281. The corolla is superior when it is inserted above the germ; inferior, when below. It is regular when each divi- sion corresponds to the other. The Rose and Pink have regular corollas. When the parts do not correspond with each other, a corolla is irregular, as in the Pea and Violet. Different forms of Monopetalous Corollas. _ Monopetalous corollas may, according to their forms, be di- vided as follows;. 277. What are the parts of a monopetalous corolla 1 278. What are the parts of a polypetalous corolla 1 279. What is the lamina 1 280. What is the
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