The plants the florist grows under this name are both white and silvery leaved plants.
C. candidissima (this I think should be ragusina) is a very fine, silvery leaved plant and was once more largely grown than at present. Its fine entire leaf was grand for the edge of beds or long ribbon borders.
It is an almost hardy plant and except when being propagated requires but little heat in the winter time. One reason why this good bedding plant is not more often grown is that it has the bad habit of rotting off in summer and leaving an unsightly gap in the bed or border.
If raised from seed sow not later than September and grow along on a light, cool shelf all winter. By bedding out time you will have a plant in a 3-inch pot, which is none too large. If propagated by cuttings lift a number of old plants in October. A good many of the old leaves can be shortened or cut away. During winter cut up the old plant, from which you will get a number of cuttings. They are really more nearly divisions or offshoots. They root with ordinary care in the sand, and must be grown on cool and light.
C. gymnocarpa, the kind with divided, feathery leaves, is not as clear and distinct a bedding plant, but is more generally useful. It is used largely in our vases and veranda boxes as well as for the edging of large beds.
It is always raised from seed, which sow in flats in January. They should be grown on light and cool, but not starved for want of pot room. A hotbed makes them jump, but produces too rank a growth. By middle of April they should go into a 3 or 3 1/2-inch pot and be plunged in a coldframe, where they will make sturdy, useful plants.