This section is from the book "A Dictionary Of Modern Gardening", by George William Johnson, David Landreth. Also available from Amazon: The Winter Harvest Handbook: Year Round Vegetable Production Using Deep Organic Techniques and Unheated Greenhouses.
Fifty-eight species and some varieties. Hardy plants. The herbaceous kinds for the most part grow well in a rich peaty soil, and may be increased by division. The annuals and biennials by seeds. Common soil.
Gentiana acaulis. Is a hardy and herbaceous creeper. Sow the seeds of this as soon as they are ripe, (otherwise they soon lose the power of vegetation,) in pans filled with rather heavy peat. Sow on the surface, without any covering except a slight sprinkling of silver sand; then place the pans either in a cold frame facing the north, and kept close, or on the north side of a wall, where they are completely screened from the sun, and cover them with a hand-glass.
A light loam suits it best; manured annually with leaf mould. If the subsoil is dry, the soil may be advantageously more clayey.
The Amphidasis of some entomologists, is a genus of moths; including G. polosaria. Pale Brindled Beauty Moth which appears in March; eggs deposited in bands round a twig, as done by the Lacky Moth. Caterpillars appear with the opening leaves of the elm, lime, lilac, and apple tree. They are at first a light green.
G. defoliaria, Lime Looper, or Mottled Umbre Moth, feeds on the leaves of the lime and apple. Moth appears in November. Caterpillar reddish, with a bright yellow stripe on each side. Female moth has no wings, so that a piece of cloth dipped in tar and bound round a tree's stem prevents its ascent.
G. piniaria attacks the pine and fir tribe.
Six species. Palms. Seed. Rich sandy loam, and a strong heat.
Fifty-one species and some varieties. Chiefly hardy herbaceous perennials. The green-house and frame kinds increase from cuttings or seeds, and grow well in a mixture of loam and peat, and vegetable soil. The hardy species and the annuals increase from seeds, and require only common soil. See Pelargonium.
Seven species. Hardy annuals, biennials, and herbaceous perennials. Seed or cuttings. Peaty soil.
Gerbera crenata. Green-house biennial. Seeds. Sandy loam and peat.
Old Man's Beard. Three species. Hardy annuals. G. calyculatus an herbaceous perennial. Seeds. Common soil.
Thirty species, and two varieties. Stove herbaceous perennials, or evergreen shrubs. Cuttings. Rich light soil.
Five species. Greenhouse bulbous perennials. Offsets or seeds. Sandy loam and peat.
Two species. Stove evergreen climbers. Cuttings. Loam and peat.
Twenty-three species, and a few varieties. Hardy herbaceous perennials. Division or seeds. Rich light loamy soil.
Eight species, and one variety. Hardy annuals. Seeds. - Common soil. G. aggregata; a greenhouse biennial.
Two species. Hardy herbaceous perennials. Division. Peat and loam.
See Mathiola.
Parin-arium macrophyllum.
See bombyx.
 
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