Volume 26: Wei Jiangchun: Umbilicariaceae. 2026. illus. 130 p. gr8vo. Hardcover. - Chinese, with Latin nomenclature.

This volume, *Flora Lichenum Sinicorum* (Vol. 26) Umbilicariaceae, presents the research findings on genera and species. It is divided into two parts: a general overview and specialized sections. The general overview discusses the concept and systematic analysis of basotrophic co-ancestor systematization, which combines genotype and phenotype. Basal-phenotypic co-ancestor systematization differs from phenotypic biological systematics, genotypic systematics based on genes or multi-gene fragments, and basotrophic comprehensive systematics. Its key advantage lies in its ability to effectively distinguish homomorphic traits resulting from convergent or parallel evolution, as well as homologous traits arising from divergent evolution, thus providing a feasible approach for identifying monophyletic groups. The general overview also includes biogeographical analysis and discusses the relationship between lichens and human health and development. The specialized sections, based on the basotrophic co-ancestor systematization analysis of the genera, cite the proper names, original synonyms, and related synonyms and their sources for 72 species in 2 genera. For each species, a characteristic summary, description, and locality record are provided. The location, collector, and depositary information for each species are clearly recorded. This volume includes 8 color plates with 61 color illustrations, 41 illustrations in the text, and 5 tables.