18.1 Each genus should be illustrated fully by at least one species, with the remaining species of the genus being shown by their respective diagnostic characters. All illustrations should be done with waterproof black ink on white drawing paper, on tracing paper or on bristol board. Lines should be clear enough to withstand reduction. It is advisable not to crowd full drawings of more than two species into a single plate illustrations. Also, avoid placing drawings of species of unrelated genera on the same plate. Line scales must appear on the plate to indicate size and magnification. All plates should be numbered in Arabic. The included figures on each plate should be identified with a letter (e.g., Plate 1a-g or Plate 2a-e).
18.2 Legend(s) should be submitted on separate sheets together with the illustration(s). It should begin with the plate number followed by the inclusive figure letters, the name of a taxon, and the information of voucher specimen placed inside a parenthesis. For example, Plate 1a-e. Trematodon longicollis (Xinjing, Wu 350, PE). -a. Plant habit; -b. Stem cross-section; -c. Leaf cells; -d. Capsule; -e. Peristome.
18.3 All drawings must be original and they are not taken from illustrations of published floras or references. If no new illustrations are provided for a species, references to previously published illustrations, especially to those published in the Bryophyte Flora of China (Chinese version) should be cited after the species discussion section.
18.4 All Chinese endemics and new taxa described in the Flora should be fully illustrated. Authors are encouraged to provide illustrations of East Asiatic taxa that are of taxonomic importance.