Sun-Flower, or Helianthus, L. a genus of exotic plants, consist-ing of 14 species, most of which are cultivated in Britain : the principal, however, are :

1. The annuus (corona soils), or Common Sun-flower: it is easily propagated in any common soil, either by sowing the seeds, or by parting the ryots in the month of March. Within a few weeks, the plants will appear; and, when about 6 inches high, they should be removed into the borders of gardens, or other places selected for their growth, at the distance of 15 or 18 inches, in quincunx order. They must be occasionally watered ; and, if weeds be properly eradicated, they will vegetate with such luxuriance, as to attain the height of six or eight feet: in July they bear flowers, which continue to blow till October, when they produce ripe seeds; which, on expression, yield a large proportion of a sweet, palatable oil. The young flower-cups of this plant may be dressed and eaten like artichokes ; - the stalks are of a considerable size, often exceeding an inch in diameter : hence, they may with advantage be raised in situations where fuel is scarce; indeed, we are not acquainted with any vegetable that is likely to afford greater advantages to an industrious cultivator who possesses a few acres of ground which, is not sufficiently fertile for corn or pasture-grasses. It deserves, however, to be remarked, that it greatly tends to impoverish the land ; as it requires constant moisture, and would not be productive without artificial irrigation. - See KlTCHEN-GAKDEN, vol. iii. p. 50 ; and Paper, p.336.

2. The tuberosus, or Tuberous Sun-flower, a native of Brazil, likewise bears single stalks, which frequently attain the height of 9 feet. Having already described this species, under the head of Artichoke, the Jerusalem, we shall only observe, that it produces no ripe seeds, and bears smaller flowers than the preceding; but it is more easily propagated: for, when the roots are once planted, they in-cessantly vegetate in the same soil, without requiring rich manure, or great attention; and, though left throughout the winter in the ground, they withstand the se-verest frost.

The different species of the Sunflower have, hitherto, been culti-d only for ornament; but it must be obvious, that they may be rendered subservient to many economical purposes, especially as substitutes for hemp, in manufacturing pack-thread from their strong fibrous stalks. Lastly, it deserves to be noticed, that the flowers of these plants regularly take the direction corresponding to the sun's course, while they afford to lees a considerable supply of honey.