Petrocodon asterostriatus (Gesneriaceae), a New Species from Guangxi, China

Petrocodon wui (Gesneriaceae), a new species from Guizhou, China

“…Of the 370 (23.21%) variable characters, 222 (13.93%) were parsimony informative. The phylogenetic trees revealed that all sampled Petrocodon taxa clustered together as a monophyletic group (BP = 100%), which is consistent with previous studies ( Yang et al 2022 ). Three strongly-supported clades are attributed to Petrocodon .…”

“…The nuclear ribosomal internal transcribed spacer ( ITS ) region and plastid trnL-F intron spacer region ( trnL-F ) were used in the study. Primers, DNA extraction, PCR amplification and sequencing followed Yang et al (2022) . To elucidate the phylogenetic affinities of the undescribed species within the genus, we incorporated 39 samples representing 25 species (Table 1 ), following Yang et al (2022) .…”

“…Primers, DNA extraction, PCR amplification and sequencing followed Yang et al (2022) . To elucidate the phylogenetic affinities of the undescribed species within the genus, we incorporated 39 samples representing 25 species (Table 1 ), following Yang et al (2022) . The ingroup contained 37 samples from 23 species of Petrocodon .…”

“…The genus, Petrocodon Hance (subfamily Didymocarpoideae , family Gesneriaceae ), has 47 species, including the newly-published taxon P. asterostriatus F.Wen, Y.G.Wei & W.C.Chou ( Möller 2019 ; GRC 2022 ; Yang et al 2022 ). All known species of this genus are lithophytes (= rock dwelling), either growing in karst topographies or in Danxia landforms.…”

A new lithophilous species of Gesneriaceae, Petrocodon rubrostriatus, from the karst area of South Yunnan, China

“… Petrocodon Hance is a genus of lithophytic perennial herbs in the Gesneriaceae with currently 49 species and one variety ( P. dealbatus var. denticulatus ), mainly distributed in the limestone regions of southwestern China, and four species distributed on the northern Indo-China Peninsular ( Huang et al 2022 ; Yang et al 2022 ; GRC 2023; POWO 2023 ; Zhang et al 2023 ). Most species of Petrocodon are endemic to karst landscapes ( Fan et al 2020 ; Li et al 2020 a, b), except for three species, Petrocodon asterocalyx F.Wen, Y.G.Wei & R.L.Zhang ( Zhang et al 2018 ), P. chishuiensis Z.B.Xin, F.Wen & S.B.Zhou ( Xin et al 2020 ), and P. wui F.Wen & R.B.Zhang ( Zhang et al 2023 ), which are distributed in Danxia landforms.…”