 |
| Hemiboea kaiyangensis T.Peng & S.Z.He, in Peng, He, Wang, Huang & Zhou, 2022. |
Abstract
A new species of Gesneriaceae from Guizhou, China, Hemiboea kaiyangensis sp. nov., is described and illustrated. We investigated its phylogenetic position and relationships with 13 other species of Hemiboea C.B.Clarke, which present large morphological diversity in the genus, based on molecular analyses of the nuclear ribosomal internal transcribed spacer (ITS) and the chloroplast trnL-F intron-spacer sequences. The molecular phylogenetic analyses revealed that the new species is most closely related to H. ovalifolia. A diagnostic table and discussion of morphological characters are provided to differentiate the new species from H. longisepala, H. flaccida and H. ovalifolia.
Keywords: Gesneriad, ITS, morphology, phylogeny, taxonomy, trnL-F
 |
Hemiboea kaiyangensis T.Peng & S.Z.He A habit, showing flowering branch B opened corolla, showing stamens, staminodes and ring of hairs at base of tube C calyx, pistil and disc D stigma E stamens F infructescence G cross section of ovary, showing parietal placentation. Drawing by S.Q.He and Y.X.Zhu. |
 |
Hemiboea kaiyangensis T.Peng & S.Z.He A habitat B plant with flowering branches C involucrum, early deciduous, before flower opening D pair-flowered cymes E calyx, disc and pistil F opened corolla, showing stamens, staminodes and ring of hairs at base of tube G cross section of capsule, showing two parietal placentation H seeds. Scale bar: 0.5 mm (Based on the holotype Shun-Zhi He 90819). |
Hemiboea kaiyangensis T.Peng & S.Z.He, sp. nov.
Diagnosis: Hemiboea kaiyangensis is most similar to H. longisepala Z.Y.Li, H. flaccida Chun ex Z.Y.Li and H. ovalifolia (W.T.Wang) A.Weber & Mich.Möller in the glabrous pistil, but it differs in the cordate involucre bracts that are early deciduous, the corolla densely glandular puberulent outside and glabrous inside, and pale yellowish-green to pale yellowish-white outside.
Distribution and ecology: Known only from a single limestone gorge in Kaiyang county, Guizhou Province, China. Only five populations were found, growing on the mouth of caves in shady and damp forests, close to a road, between 900 and 930 m in elevation.
Etymology: The name of the new species, kaiyangensis, refers to the type locality, Kaiyang County, Guiyang, Guizhou Province, China.
Tao Peng, Shun-Zhi He, Shun-Li Wang, Dan Huang and Xu-Ping Zhou. 2022. Hemiboea kaiyangensis, A New Species of Gesneriaceae endemic to Guizhou, China. PhytoKeys. 211: 63-73. DOI: 10.3897/phytokeys.211.85630
