Paraphlomis kuankuoshuiensis (Lamiaceae), a new species found in the limestone areas of northern Guizhou, China, is described and illustrated in this paper. Based on its tubular-campanulate calyx, this taxon should be a member of sect. Paraphlomis Prain. The new species resembles P. patentisetulosa C., but differs from these three taxa in the following aspects: the stems are very short (<7 cm), with one or two short internodes, giving the impression of having a tuft of basal leaves; it has sparsely setose hairs on the outer surface of the calyces and short fruiting calyces. The florescence, fruit period, habitat, and the geographical distribution of P. kuankuoshuiensis are also quite different from the three closely related species.

Primulina serrulata R.B.Zhang &amp; F. Wen, a new species from a limestone area in southeastern Guizhou, China, is described and illustrated here. The new species is morphologically related to P. fimbrisepala (Hand.-Mazz.) Y.Z.Wang. We examined the morphological differences between these congeners and provide illustrations and photographs of this new species in this paper.

Petrocodon tongziensis R.B.Zhang & F.Wen, a new species from northern Guizhou province, China, is described and illustrated based on molecular and morphological evidence. The new species was found growing in crevices and on tufa of moist surfaces of limestone hills in Tongzi County. A maximum parsimony (MP) analysis based on the combined ITS and trnL‐F DNA regions showed that the new species falls within a large polytomy within Petrocodon, but is resolved as most closely related to an unidentified species (WF2014) and these two taxa are in turn resolved as sister to Petrocodon hunanensis X.L.Yu & Ming Li. This is congruent with the fact that both P. hunanensis and P. tongziensis have four fertile stamens, a character state likely to be an ancestral state distinguishing this clade from the rest of Petrocodon. Petrocodon tongziensis differs from P. hunanensis by lacking a terrestrial stem, as well as by the number of bracts, presence of bracteoles, shape of the lobes of the upper lip, and reduced number and length of staminodes.

We describe and illustrate Sedum lipingense (Crassulaceae), a new species of stonecrop found in the limestone areas of SE Guizhou, China. Based on the presence of adaxially gibbous carpels and follicles, this taxon belongs to sect. Sedum S.H. Fu. The new species superficially resembles S. subtile Miquel and S. bulbiferum Makino but differs from these two taxa in its development of a basal leaf rosette during florescence. The nrDNA internal transcribed spacer (ITS) sequences also support the claim that this plant is a new species in the Sedum genus.

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