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| Primulina pingnanensis Xin Hong, Z.L.Li & W.C.Chou., in Li, Kuang, Xu, Chou, Hong et Ding, 2023. |
Abstract
A new species of Primulina, P. pingnanensis, from the Guangxi Zhuangzu Autonomous Region, China, is described and illustrated here. It is morphologically similar to P. orthandra but has significant differences in the bracts, corolla tube and lobes shape, as well as in the indumentum of the outer surface of the corolla, the filaments, the staminodes and the anthers. Colorful photographs and essential information of this new taxon are also provided, including detailed taxonomic description, distribution, habitat, the comparison table, and the IUCN conservation status. We also discuss a validation of new combination P. crassifolia and Chirita crassifolia.
Key words: Flora of Guangxi, Gesneriaceae, limestone flora, new taxon, Primulina orthandra, taxonomy
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| Primulina pingnanensis Xin Hong, Z.L.Li & W.C.Chou A plants in natural habitat B cymes C opened corolla and dissected calyx lobes with pistil D leaves (up: adaxial surface, down: abaxial surface) E young fruit F bracts G stigmas H stamens. |
Primulina pingnanensis Xin Hong, Z.L.Li & W.C.Chou., sp. nov.
Diagnosis: Primulina pingnanensis morphologically resembles P. orthandra but is distinguished from the latter by bracts lanceolate (vs. ovate), corolla tube funnel-form and no constriction in the middle (vs. tube near tubular with constriction in the middle), outer corolla surface sparsely white puberulent (vs. glabrous), corolla lobes oblong (vs. broadly ovate), filaments strongly curved at the middle (vs. straight), anthers fused from the entire adaxial surface and sparsely barbate (vs. confluent at apex, glabrous), staminodes obvious, 1–1.3 cm long, sparsely pubescent (vs.ca. 1.5 mm long, glabrous). Detailed morphological comparisons with P. orthandra are provided in Table 1 and Fig. 2.
Etymology: The specific epithet is derived from the type locality, Pingnan County. This county is the birthplace of Mr. Chou’s mother. Thus, Mr. Chou strongly suggested using “pingnanensis” as the scientific name.
Vernacular name: Píng Nán Bào Chūn Jù Tái (Chinese pronunciation); 平南报春苣苔 (Chinese name).
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| Morphological comparisons between Primulina pingnanensis and P. orthandra A habit of P. pingnanensis B habit of P. orthandra C lateral view of mature flower of P. pingnanensis D lateral view of mature flower of P. orthandra E staminodes of P. pingnanensis F staminodes of P. orthandra G filaments of P. pingnanensis H filaments of P. orthandra I bracts of P. pingnanensis J bracts of P. orthandra. |
Zheng-Long Li, Yan-Yun Kuang, Qing-Qing Xu, Wei-Chuen Chou, Xin Hong and Li Ding. 2023. Primulina pingnanensis, A New Species of Gesneriaceae from Guangxi, China. PhytoKeys. 229: 157-165. DOI: 10.3897/phytokeys.229.103735
