The Eschscholtzia is the last genus of the order Papaveraceæ that I shall mention here, and it deserves a particular description, both from its popularity and the beauty of its flowers, and from the singularity of its botanical construction. The bud when it first appears is enfolded in a calyx, which is pointed at its upper extremity, and appears to have a kind of rim near its base. When the flower is ready to expand, the calyx detaches itself all round from the projecting rim, and rises gradually without opening, till the flower actually pushes it off. The detached calyx resembles an extinguisher, and hence it is called calyptrate, which has that signification. The flower is cup-shaped; there are four petals and four stigmas, two of which are much longer than the others. The capsules are elongated like those of the Horned Poppy, but they are distinguished by the projection of the flat fleshy disk at their base; they are two-valved and two-celled. The leaves are glaucous, and finely cut. There are three species, or perhaps varieties, which differ principally in the degree of enlargement of the receptacle or disk. They have all large fleshy roots, which bleed copiously if wounded, and for this reason the plants are difficult to remove unless when quite young. ORDER XII. FUMARIACEÆ.—THE FUMITORY TRIBE. The flowers of plants of this order are so peculiar in their shape, as when once seen to be easily remembered. There are two small sepals, which soon fall off, and four petals of an irregular shape, two of them being drawn out into a kind of spur. There are six stamens, and the fruit is silique-formed. The plants have somewhat of a smoky smell, and when broken yield a watery juice. The principal genera are Fumaria, Corydalis, and Diclytra. ORDER XIII. CRUCIFERÆ.—CRUCIFEROUS PLANTS. [Illustration: FIG. 113.—THE FLOWER AND STAMENS AND PISTIL OF THE SEA-KALE, TO ILLUSTRATE THE CRUCIFERÆ.] [Illustration: FIG. 114.—A SILLICLE.]