There is an accompanying volume with illustrations.
Volume 11 covers 35 plant families. Some examples of the many that have economic and horticultural importance are: Aceraceae, of which the numerous Acer or maple trees have a distribution range centered in China; Anacardiaceae, including the cashew nut and mango; Aquifoliaceae, with hundreds of holly trees and shrubs in the genus Ilex; Buxaceae, best known for the boxwoods; Euphorbiaceae, or spurge family, containing the rubber and Chinese tallow trees as well as the food staple tapioca; Geraniaceae, comprising mainly the cranesbills and geraniums; Linaceae, notable for Linum, or flax, which is cultivated for its stem fiber and seed oil; Polygalaceae, with plants of medicinal value; Rutaceae, or citrus fruit family, including also Sichuan pepper from the genus Zanthoxylum; and Staphyleaceae, which includes the ornamental bladder nut shrubs.