809. Greenhouses are not unknown in China. Wathen (Journal of a Voyage to China, &c., 1814) describes the villa (fig. 228.) of Pon-qua-qua, a retired merchant and mandarin, as containing a greenhouse (a), an aviary (b), a banqueting room open on one side, a garden with the walks bordered with porcelain pots of orange trees and camellias, and an immense banyan tree (Ficus benghalensis).