Biennials are those plants which are raised from seeds in the spring or early summer and require the whole season to make their growth preparatory to flowering the next year, dying after ripening seeds.
Perennials differ from the above in living more than two years. All plants, such as hardy border flowers, that die down and spring up again from the root-stock year after year are perennials—herbaceous. Roses and other flowering shrubs are also perennials, but not herbaceous. Orchids. One of the best examples of herbaceous perennials is that of the Orchids, the most popular of which are the Odontoglossums and the Cattleyas.
Florist’s Flowers. This term has been applied to a number of plants which under cultivation and by selection or hybridization have produced from seed varieties of improved form, habit or color. The plants included under this title are constantly being added to, and great impetus given to the cultivation of hardy flowers and plants in recent years. The following are representative of this class:
Begonia. Named in honor of M. Begon, a French patron of botany. All the species of Begonia are interesting and beautiful winter ornaments of the hot-house or green-house, of the simplest culture in any rich soil if allowed an abundant supply of water. There are several tuberous-rooted species and varieties. They have large, showy flowers, and succeed well in a moist, shady border. The tubers should be kept warm and dry during the winter. They are readily propagated by cuttings, seeds, or division of tubers.
Carnation (Dianthus caryophyllus) is an almost hardy herbaceous perennial plant, a native of southern Europe. The Greeks and Romans used it for making chaplets whence it was called “coronation.” It is a favorite exhibition flower, of many varieties, forms and colors; but the red, white, pink and yellow predominate. Carnations are among the plants which can be grown in the atmosphere of cities, but they are intolerant of shade. Propagation is usually effected by the process of layering, but cutting, seeds, and divisions are also employed.
Cattleya. What the rose and carnation are among garden plants, the Cattleya is among Orchids, preëminently beautiful. Not a species but possesses claims of the strongest nature on the culturist’s attention, either for its delicate loveliness or the rich and vivid coloring of its large and handsome flowers. They are natives of the temperate parts of South America, and in cultivation are found to succeed in a lower temperature than is necessary for the majority of plants of the same order. The plants grow vigorously, and consequently flower in perfection. The colors of the flowers run through all the shades of white, rose, rosy-lilac, crimson and carmine, nor is even yellow absent.
Dahlia. This, through constant improvement, has become one of the indispensable flowers. It derived its name from the Swedish botanist Dahl. Dahlias are known as show, fancy, pompon, single and cactus. They vary from the single type, not unlike a daisy, with broad rays, to the tiny, tightly-quilled, formal “pompon,” and to the “cactus-flowered,” resembling a chrysanthemum; and their lines are equally varied. Yellow, lilac, white and the deepest maroon, are found in innumerable combinations. It is necessary to lift the roots in late autumn, and, having ripened them in a shed, to store them for the winter in a cool, dry place, where the temperature will not fall below thirty-two degrees Fahrenheit. In the spring, the separate tubers may be planted in deep, rich soil; or the roots may be placed in February in a hot-bed, and when the young shoots which form are about three and a half inches long, they may be separated, together with a small piece of the tuber, and potted in small pots, which should be placed in the hot-bed until the young plants are ready to be hardened, preparatory to being planted outdoors.
Geranium. Our native species, called “crane’s bill,” from the beak-like appearance of the fruit, have palmately lobed or cleft leaves. The flowers have unusually bright-colored petals. The plants commonly cultivated in gardens and greenhouses under the name of Geraniums are species of Pelargonium. There are about one hundred and twenty-five species, mostly natives of the Cape of Good Hope, prized on account of the brilliant colors, of the flowers and the shape and markings of the leaves.
The most popular method of propagating is by cuttings, which can be rooted in pots or boxes of light soil placed in a greenhouse, or even a cottage window, at any time from spring to autumn, provided the soil is not kept very moist. Good loam is the best potting material, and beyond a little sand it needs no addition. Firm potting is a point to be well observed. Avoid coddling.
Gloxinia is the florists’ name for plants belonging to the genus Sinningia, tropical American plants. They have beautiful, many-colored, funnel-shaped flowers and velvety leaves. Seeds should be sown in February; and if the young plants are carefully potted, they flower the first year. They require the temperature of a warm greenhouse during the summer months; but as the leaves die away in autumn, the roots may be stored in a dry place, merely protected from cold. They like a sandy soil, containing abundance of leaf-mould and heat.