2025/12/15 by Lang Huang, Wei-Hao Yao, Yan-Bing Yang +4 · 1 voice
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Plant Diversity and Evolution #Plant and Fungal Species Descriptions #Plant and animal studies
paper · pdf · doi:10.3897/phytokeys.268.152287
openalex created_date 2025/12/15 · openalex publication_date 2025/12/15 · openalex updated_date 2026/07/02
Dysosma xishuiensis Y. B. Yang, M. T. An & C. H. Yang is described and illustrated as a new species from Xishui County in northern Guizhou Province, China. This species is morphologically similar to D. versipellis , but differs by its glabrous abaxial leaf surface, pedicels, and sepals; inflorescences bearing more flowers (8–20 vs. 5–8); larger obovate–oblong petals (2.8–3.4 × 1.5–2.0 cm vs. 2.5 × 0.8 cm); and an obpyriform ovary (vs. ellipsoid). The phylogenetic relationships reconstructed using ITS, matK , and rbcL sequences further confirm that it is a new species within Dysosma . This species is currently known only from the Xishui National Nature Reserve in Guizhou. According to IUCN criteria (B2, D), due to its limited distribution and low population numbers, D. xishuiensis is assessed as Endangered (EN).