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| Petrocodon dahuaensis M.L.Mo, Chen Feng & Z.C.Lu, in Mo, Chang, Wu, Zhang, Lu et Feng, 2026. |
Abstract
Petrocodon dahuaensis, a new species from a limestone area of Guangxi, China, is described and illustrated. The new species is similar to P. asterostriatus but differs in its leaf blade, cordate to subrounded, margin crenate to serrate; bracts, bracteoles, and calyx smaller; corolla purple, base straight to slightly inflated; filaments purple; and style densely glandular-puberulent. Molecular evidence also supports its close relationship with P. asterostriatus. According to the IUCN Red List Categories and Criteria, the provisional conservation status of P. dahuaensis is assessed as Data Deficient (DD).
Key words: Morphology, new taxon, Petrocodon asterostriatus, taxonomy
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Petrocodon dahuaensis sp. nov. A. Habit; B. Flowering plant; C. Cyme and bracts; D. Opened corolla; E. Lateral view of flower; F. Back view of flower; G. Pistils and calyces; H. Frontal view of flower; I. Stamens; J. Adaxial view of leaf blade; K. Abaxial view of leaf blade; L. Capsules. |
Petrocodon dahuaensis M.L.Mo, Chen Feng & Z.C.Lu, sp. nov.
Chinese name. dà huà shí shān jù tái (大化石山苣苔).
Diagnostic. The new species is similar to Petrocodon asterostriatus F.Wen, Y.G.Wei & W.C.Chou, but differs by its leaf blades cordate to subrounded, margin crenate or serrate (vs. broadly ovate to subcordate, margin entire), bracts 4–9 mm long (vs. 10–25 mm long), bracteoles ca. 2 mm long (vs. 9–18 mm long), calyx 5–7 mm long (vs. 8–16 mm long), corolla purple (vs. pale purplish-maroon), base straight to slightly inflated (vs. near spherical), filaments purple (vs. white), and style densely glandular-puberulent (vs. densely puberulent).
Ming-Lin Mo, Shi-Li Chang, You-Dong Wu, Yi Zhang, Zhao-Cen Lu and Chen Feng. 2026. Petrocodon dahuaensis (Gesneriaceae), A New Species from the Limestone Area of Guangxi, China. PhytoKeys. 272: 121-132. DOI: doi.org/10.3897/phytokeys.272.181552 [31 Mar 2026]
