Sprout white; the top, as it breaks ground, purple; size very large, sometimes measuring an inch and three-fourths in diameter, but greatly affected by soil and cultivation.
A hundred sprouts of this variety have been produced which weighed twenty-five pounds.
Green-Top.
This variety, when grown under the same conditions as the Giant Purple-top, is generally smaller or more slender. The top of the sprout, and the scales on the sides, are often slightly tinged with purple. The plant, when full grown, is perceptibly more green than that of the Giant Purple-top. From most nursery-beds, plants of both varieties will probably be obtained, with every intervening grade of size and color.
CARDOON.
Chardon. Chardoon. Cynara cardunculus.
In its general character and appearance, the Cardoon resembles the Artichoke. Its full size is not attained until the second year, when it is "truly a gigantic herbaceous plant," of five or six feet in height. The flowers, which are smaller than those of the artichoke, are produced in July and August of the second year, and are composed of numerous small blue florets, enclosed by somewhat fleshy, pointed scales. The seeds are oblong, a little flattened, of a grayish or grayish-green color, spotted and streaked with deep brown; and, when perfectly grown, are similar in size and form to those of the apple. About six hundred are contained in an ounce; and they retain their vitality seven years.
Soil, Propagation, and Culture.—The best soil for the Cardoon is a light and deep but not over-rich loam. It is raised from seed; which, as the plant is used in the first year of its growth and is liable to be injured by the winter, should be sown annually, although the Cardoon is really a perennial. It succeeds best when sown where the plants are to remain; for, if removed, the plants recover slowly, are more liable to run to seed, and, besides, seldom attain the size of those that have not been transplanted.
The seed should be sown as early in spring as the weather becomes warm and settled, in drills three feet apart, an inch and a half in depth, and the young plants afterwards thinned to twelve inches asunder in the drills. The leaves are blanched before being used.