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INTRODUCTION TO BOTANY.'

The Class MON'ANDRIA contains two orders.

Monogynm. One Pistil. Example— Salicornia, Glasswoit; Camia,Indian Shot.

Digynia. Two Pistils. Examp.— Callilriche, Water Cliickweed;Biitum, Strawberry Spillage.

DIANDRIC contains also three orders, named from the same : i. e.Monogynia. Examp.— Ligustrum, Privet; Veronica, Speedwell;Ciraea, Enchanter's Nightshade ; Salvia, Sage.Digynia. Examp.— Anlhoxanthum, Sweet-scented Vernal Grass.Trigynia. Examp.— Piper, Pepper.

TRIANDRIA also contains three orders, named from the same.Monogynia, Examp— Valeriana, Valerian : Crocus, Saffron ; andIns.

•/ Darnel-Grass; Festuca, Fescue-Grass;

Digynia. Examp.— L,muTriticum, Wheat.

Tiugynia. Examp. — Monlia, Water-Chickwecu.

TETRANDEIA will also be found to contain three orders, the di-stinctions of which are formed from the same circumstances as the fore-going.

It was observed in our description of this class above, that heedshould be taken to distinguish this from the class Didynamia; but asthe character of these flowers is in some measure distinct, there will beno reason to load the student's mind with any further observation,than that the orders in that class are not formed on the stiles or pistils,but on the seed-vessel.

Monogynia. Examp. — Dipsacus, Teazle; Scahiosa*, Scabious;Ptantago, Plantain.

Digynia. Examp.— Cuscuta, Dodder; dphanes, Parsley-pert.

Teiiiagynia. Examp.— Sagina, Pearl-Wort; Potamogeton, Pond-weed.

PENTANDRIA contains six orders.

Monogynia. Examp. —- Primula, Primrose; Convolvulus, Bind-weed ; Lonicera, Honeysuckle.

Digynia, Examp. — Geniiana, Centaury; Conium, Hemlock;Ulmus, Elm.

Trigynia. Examp.— Vihurnurn, Wayfaring-tree; Sambucus, Elder.

Tetragynia. Examp.— Parnassia, Grass of Parnassus.

Pentagynia. Examp. — Slatice, Thrift; Linum, Flax; Drosera,Sun-Dew.

Poiygynia. Examp.— Myosurus, Mousetail.

* This genus may be mistaken by a young botanist for a flower ofthe class Syagenesia; but he will, on consulting the orders of thatclass, find that the flower of this genus is very distinct, in having fourperfect stamens in each, and being set.