A POLYPET ALOUS COROLLA has its petals distinct and separate from each other, so that each one can be pulled off without disturbing the others.

A GAMOPET ALOUS COROLLA has its petals more or less grown together by their edges, so that if you pull one the whole corolla comes off.

SCHEDULE TWENTY-FOUR, DESCRIBING FIG. 185.

A POLYPHYL'LOUS PERIANTH has its leaves entirely distinct and separate from each other.

A GAMOPHYL'LOUS PERIANTH has its leaves more or less coherent by their edges.

In the schedule will be seen a space where the forms of sepals and petals should be recorded in the same terms used to describe leaves.

A REGULAR CALYX, COROLLA, or PERIANTH, has its parts of the same size and shape.

An IRREGULAR CALYX, COROLLA, or PERIANTH, has its parts unlike in size or form.

EXERCISE XLI.

Parts of Stamens.

FIG. 190.

-Anther.

Pollen.

Filament.

FIL'AMENT.-The stem-like part of a stamen.
AN'THER.-The thickened oblong head of a fila-

ment.

POL'LEN.-The dust, or powder, seen upon the

anther.

Schedule twenty-seven has added to it the new question, Stamens? Write underneath it the name of the parts that compose a stamen of your flower. Count the number of stamens, and write it down, unless they are too numerous, when you will use the character ∞, signifying many. Write free, when they are so; and coherent, when they are grown together.

When the filament is absent, write sessile after anther. To describe the filaments, observe whether they are long or short, slender or thick, flat or round, distinct or grown together.

Observe whether the anthers are one-lobed or two-lobed, that is, whether they are in two parts or pieces; and note also whether they are oblong, round, curved, straight, large or small, longer or shorter than the filaments, distinct or grown together.

NOTE. Our descriptions of pictured flowers are necessarily imperfect, because the pictures are themselves imperfect. As the pollen is not represented in Fig. 191, it is, of course, omitted from the schedule. We can say nothing, in a book, of the color or size of specimens; yet the plan of working is clearly illustrated, and pupils will not find it difficult, at this stage, to add such points without the guidance of a pattern schedule.