Calyx monophyllus, superus, imbricatus. Corolla multiplex. Bacca monolocularis, polysperma.

Empalement one-leafed, above, tiled. Blossom of many folds. Berry of one loculament, many-seeded.

SPECIFIC CHARACTER.

Cactus prolifero-articulatus: articulis ovato-oblongis, sub-inermibus.

Habitat in Mexico.

Tuna cochenillifera.—Dill. Elth. tab. 297.

Cereus proliferous-jointed. Joints are of an ovate and oblong form, and nearly unarmed.

Native of Mexico.

REFERENCE TO THE PLATE.

1. A flower cut open.
2. The same shown from the outer side.
3. A longitudinal section of the seed-bud.
4. The cochineal insect as retailed in the shops.
5. The same shown from the under side.
6. A larger and darker sort.
7. The same shown from the under side and magnified.