The nearly related Ficoideae replace the new-world Cactaceae, but the habit of the latter is simulated by fleshy Euphorbias and Asclepiads, just as that of A gave is by the liliaceous Aloe.
When we have mentioned vanilla, which consists of the fleshy pods of an orchid, we have mentioned about the only economic product that now comes into market.
The jointed leaves are fleshy or leathery; the flowers are generally large with a well-developed lip.
The absence of the ordinary bright green colours of vegetation is another peculiarity of this flora, almost all the plants having glaucous or whitened stems. Foliage is reduced to a minimum, the moisture of the plant being stored up in massive or fleshy stems against the long-continued drought.
Laterally the foot gives rise to a pair of mobile fleshy lobes, the parapodia (ep), which can be thrown up so as to cover in the dorsal surface of the animal.