Oreocharis wuxiensis (Gesneriaceae), a new lithophilous species from Northeast Chongqing, China Author Xiong, Chi 0000-0002-9082-2539 Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China & National Gesneriaceae Germplasm Resources Bank of GXIB, Gesneriad Committee of China Wild Plant Conservation Association, Gesneriad Conservation Center of China (GCCC), Guangxi Institute of Botany, Guilin Botanical Garden, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China & guilinxiongchi @ 126. com; https: // orcid. org / 0000 - 0002 - 9082 - 2539 Author Chen, Feng 0000-0003-3398-8900 Chongqing Museum of Natural History, Beibei, Chongqing 400799, China & fengchen 408 @ 163. com; https: // orcid. org / 0000 - 0003 - 3398 - 8900 Author Zhang, Jia-Hui 0000-0002-2259-6402 Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation. Institute of Resources Botany, College of Life Science, Southwest University, Beibei, Chongqing, 400715, China & zjhscxc @ swu. edu. cn; https: // orcid. org / 0000 - 0002 - 2259 - 6402 zjhscxc@swu.edu.cn Author Zhou, Hou-Lin 0000-0002-2566-1345 Chongqing Wulipo National Nature Reserve Management Service Center, Wushan, Chongqing, 404700, China & 674393605 @ qq. com; https: // orcid. org / 0000 - 0002 - 2566 - 1345 674393605@qq.com Author Zheng, Chang-Bing 0000-0002-2044-5096 Chongqing Yintiaoling National Nature Reserve Management Service Center, Wuxi, Chongqing, 405800, China & 552151709 @ qq. com; https: // orcid. org / 0000 - 0002 - 2044 - 5096 552151709@qq.com Author Wen, Fang Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China & National Gesneriaceae Germplasm Resources Bank of GXIB, Gesneriad Committee of China Wild Plant Conservation Association, Gesneriad Conservation Center of China (GCCC), Guangxi Institute of Botany, Guilin Botanical Garden, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China text Phytotaxa 2023 2023-04-24 594 1 73 77 http://dx.doi.org/10.11646/phytotaxa.594.1.5 journal article 255930 10.11646/phytotaxa.594.1.5 122a53db-dc73-415a-85be-5f35ec00a3da 1179-3163 7868949 Oreocharis wuxiensis C.Xiong, F.Chen & F.Wen , sp. nov. ( Figs. 1 & 2A 1–G1 ) FIGURE 1. Oreocharis wuxiensis sp. nov. A. Habitat; B. Plant with fruits; C. Inflorescence; D. Leaf blades; E. Flowers; F. Side view of a flower; G. Dorsal view of a flower; H. Ventral view of a flower; I. Opened corolla showing stamens; J. Pistil with disc and calyx lobes; K. Disc and ovary; L. Capsules. A, C–K were photographed by Chi Xiong, B, and D by Hou-Lin Zhou, and L by Feng Chen. Diagnosis: — Oreocharis wuxiensis resembles O. giraldii ( Figs. 2A2–G2 ) in foliar and floral characteristics, including the shape and indumentum of the leaf blade, the shape, and color of the corolla. It is easily distinguished by its corolla tube tubular to slightly funnelform and not constricted, lobes semiorbicular or elliptic and as long as 1/3 tube length, staminode absent, pistil glabrous, and ovary as long as the style. Type: — CHINA . Chongqing : Wuxi County , Sheliangzi , Yintiaoling National Nature Reserve , 31°28′44″N , 109°54′29″E , elev. ca. 1670 m , 24 June 2021 , Chi Xiong & Feng Chen YTL21-580 ( holotype IBK00445395 !, isotypes IBK00445397 !, CQNM0025460 !) . FIGURE 2. Morphological comparison of Oreocharis wuxiensis sp. nov. (1) and O. giraldii (2) A. Habit; B. Flowers; C. Side view of a flower; D. Dorsal view of a flower; E. Capsule; F. Opened corolla showing stamens; G. Pistil with disc and calyx lobes. A1 were photographed by Feng Chen, A2, and B2 by Yuan-Yuan Li, B1–G1, F2, G2 by Chi Xiong, and C2–E2 by Ren-Bin Zhu. Description: —Perennial herbs, rhizomatous, 5–10 mm long. Leaves all basal; petiole 0.5–3 cm long, 2–3 mm in diameter, adaxially pale green, abaxially gray-green, densely rust-brown villous; leaf blade oblong ovate, 2.5–5.5 × 1.5–3 cm , adaxially green, gray pubescent and rust-brown villous, abaxially pale green to gray-green, rust-brown villous especially on the veins, apex acute, base cuneate to broadly cuneate, margin coarsely dentate-serrate; lateral veins usually 3–5, occasionally 6, on each side of midrib, adaxially sunken, abaxially protuberant. Cymes axillary 1–7, inflorescence dichasial, 1–8-flowered; peduncle 5–15 cm long, ca. 1 mm in diameter, rust-brown villous and glandular-pubescent; bracts 2, light green, narrowly triangular to lanceolate, 3–4 × 1–1.2 mm , abaxially rust-brown villous, adaxially glabrous, margin entire; pedicel light green, 0.8–3.2 cm long, ca. 0.5 mm in diameter, glandular-pubescent. Calyx 5-parted to base, lobes equal, lanceolate, 3.5–4 × 0.6–0.8 mm , outside rust-brown villous and glandular-pubescent, glabrous inside. Corolla dark pink to purplish-red, 1.1–1.3 cm long, outside pubescent and glandular-pubescent, inside in the throat and lobes glandular-pubescent, tube tubular from the side view, slightly funnelform in dorsal and ventral views, base slightly inflated, 0.8–1 cm long, 4 mm in diameter at the mouth in dorsal and ventral views; limb 2-lipped; adaxial lip 2-parted to the middle, lobes semiorbicular, 2–3 × 1–2 mm , abaxial lip 3- parted to near the base, lobes elliptic, 3.5–4 × 2–3 mm . Stamens 4, 4.5–5.5 mm long, adnate to corolla ca. 1 mm from base; filaments white, glabrous, straight, curved at apex, anthers coherent in pairs, thecae hippocrepiform, divergent at base, confluent at apex; staminode absent. Disc wax-yellow, 0.5–1 mm high, glabrous, margin undulate. Pistil glabrous, 5–5.5 mm long; ovary cylindrical, 2–2.5 mm long; style 2.5–3 mm long, nearly as long as ovary; stigma 2, oblate. Capsule linear, glabrous, 2–2.5 cm long. Additional specimens examined: — CHINA . Chongqing : Wuxi County , Lanying Grand Canyon , Yintiaoling National Nature Reserve , 31°26′19″N , 109°52′16″E , elev. ca. 1060 m , 16 June 2022 , Feng Chen YTL22-731 ( paratypes IBK00445396 !, CQNM0025461 !); Wuxi County , Hongqi , Yintiaoling National Nature Reserve , 31°31′18″N , 109°49′49″E , elev. ca. 1330 m , 7 April 2022 , Chi Xiong XC 22-057 ( paratype IBK00445398 !) . Distribution and Ecology: —The new species is endemic to Wuxi County, northeast Chongqing Municipality, bordering Hubei and Shaanxi Province , China . It grows on shady damp moss-covered valley cliffs, at 1060–1670 m . Phenology: —Flowering from May to June; fruiting from June to August. Etymology: —The specific epithet ‘ wuxiensis ’ refers to the type locality where the new species was found, Wuxi County, Chongqing Municipality. The Chinese name is “Wū Xī Mǎ Líng Jù Tái ( ĮḬḼḩssḕ )”. Conservation assessment: —This new species is only found in the type locality and is presently known to occur in three populations with ca. 500 mature individuals. All known populations are located by the roadside, easily disturbed by human activities. Thus, following the IUCN Red List Categories and Criteria ( IUCN 2019 ), it is temporarily assessed as Vulnerable [VU D1 ]. Taxonomic affinities: — Oreocharis wuxiensis morphologically resembles O. giraldii in having leaf blade oblo ng-ovate, gray pubescent and rust-brown villous, margin coarsely dentate-serrate, corolla purplish-red, four fertile stamens, and two stigmas. It can be easily differentiated from O. giraldii by several characteristics, including the shape of the corolla tube and lobes, the absence of staminodes, the indumentum, length of pistil, and the size of the ovary and style. The detailed characteristics of the related species are provided in Table 1 .