No.13 Z.-Y. GUO, Z.-Y. LI, X.-G. XIANG

Oreocharisduyunensis(Gesneriaceae), a new species fromGuizhou, China

Nordic Journal of Botany doi: 10.1111/njb.01514

ABSTRACT

        Oreocharis duyunensis Z.Y. Li, X.G. Xiang & Z.Y. Guo (Gesneriaceae), endemic to Guizhou, China, is described as a new species. The new species is easily distinguished from other Oreocharis species by having a white, stellate ring-like disc. Morphologically,the species is similar to Oreocharis chienii(Chun) Mich. Möller & A. Weber but differs by its densely white pilose leaves, mixed brown-pilose, pubescent and glandular-pubescent peduncle and pedicle, white stellate ring-like disc, and linear-lanceolatecapsule. Based on phylogenetic reconstruction and interspecifc genetic distances of nuclear ITS and chloroplast trnL-F regions, O. duyunensis is a new species with uncertain phylogenetic position.

Figure 1. Oreocharisduyunensissp. nov. (A) habit, (B) florescence, (C) fruit, (D) stamens and pistil, scale bar=1 mm, (E) calyx, scale bar=1 mm, (F) disc, scale bar=1 mm, (G) indumentum on peduncle and pedicle, scale bar=1 cm, (H) adaxial surface of leaf, scale bar=1 cm, (I) abaxial surface of leaf, scale bar=1 cm, (J)–(K) Oreocharischienii, scale bar=1 cm. Photos from Li Pengwei.

Figure 2. Majority rule consensus tree based on Bayesian inference analysis of Oreocharisbased on ITS (A) and trnL-F region (B). BI-PP/MP-BS values (>50%) are shown above the branches. Te dash represents support values lower than 50%. The new species is highlightedin bold.

Figure 3. Oreocharis duyunensis sp. nov. 2

Figure 4. Oreocharis duyunensis sp. nov. 3

Figure 5. Oreocharis duyunensis sp. nov. 4