﻿AbstractSedumjinglanii, a new species ofCrassulaceaefrom Mount Danxia in Guangdong, China, is described and illustrated. Phylogenetic analysis based on the internal transcribed spacer (ITS) region ofnrDNA suggests that the new species belongs toS.sect.SedumsensuFu and Ohba (2001)in the “Flora of China”, and is sister to a clade comprisingS.alfrediandS.emarginatumwith high support values (SH-aLRT= 84,UFBS= 95) but is distantly related toS.baileyi. The new species is morphologically similar toS.alfredibut it can be distinguished from the latter in its opposite leaves (vs. alternate leaves), its usually wider leaves (0.4–1.2 cm vs. 0.2–0.6 cm), its usually shorter petals (3.4–4.5 mm vs. 4–6 mm), its shorter nectar scales (0.4–0.5 mm vs. 0.5–1 mm), its shorter carpels (1.5–2.6 mm vs. 4–5 mm), and its shorter styles (0.6–0.9 mm vs. 1–2 mm). The new species can be easily distinguished fromS.emarginatumwhich both have opposite leaves by its short, erect or ascending rhizome (vs. long and prostrate rhizome in the latter), shorter petals (3.4–4.5 mm vs. 6–8 mm) and shorter carpels (1.5–2.6 mm vs. 4–5 mm). It can also be easily distinguished fromS.baileyiby its short, erect or ascending rhizome (vs. long and prostrate rhizome) and its shorter style (0.6–0.9 mm vs. 1–1.5 mm).