Rosa tomurensis, a new species of Rosa (Rosaceae) from China Author Deng, Tong 0000-0003-4707-4333 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & dt _ ton 118 @ 163. com; https: // orcid. org / 0000 - 0003 - 4707 - 4333 Author Luo, Le 0000-0002-8143-1931 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & luolebjfu @ 163. com; https: // orcid. org / 0000 - 0002 - 8143 - 1931 Author Yu, Chao 0000-0002-8096-5333 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & yuchao @ bjfu. edu. cn; https: // orcid. org / 0000 - 0002 - 8096 - 5333 yuchao@bjfu.edu.cn Author Zhang, Qi-Xiang 0000-0001-5690-0065 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & zqxbjfu @ 126. com; https: // orcid. org / 0000 - 0001 - 5690 - 0065 Author Liu, Xue-Sen 0000-0002-0240-2551 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & 2538059065 @ qq. com; https: // orcid. org / 0000 - 0002 - 0240 - 2551 2538059065@qq.com Author Deng, Ze-Yi 0000-0002-6355-0283 Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of Landscape Environment of Ministry of Education, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China & dzybfu 1999 @ 163. com; https: // orcid. org / 0000 - 0002 - 6355 - 0283 text Phytotaxa 2022 2022-08-04 556 2 169 177 http://dx.doi.org/10.11646/phytotaxa.556.2.6 journal article 116163 10.11646/phytotaxa.556.2.6 02247731-fbe5-430e-a9d0-8312ea59eb36 1179-3163 6965990 Rosa tomurensis L. Luo, C. Yu & Q. X. Zhang ( Figures 3 , 4 , 5 ) Type: — CHINA . Xinjiang Uygur autonomous region, Akesu Prefecture , Wensu County , Tuomuerfeng Natural Preservation Areas , in river valleys, ca. 1800m , 10 June 2017 , L. Luo , C. Yu , Y. J. Sui , F. Yang & S. Zhao 171022 ( holotype BJFC00107674!) . Diagnosis: — R. tomurensis is different from R. laxa in the following characteristics: prickles are rare, single prickles are larger, and the tip of prickles is not curved significantly; leaf blade apex serrate only, subbase one-third entire; flowers often solitary, and single flowers are larger than R. laxa ; receptacles purplish red, occasionally green; pedicels very long, purplish red or green; sepals are purplish red or green; hips are larger than R. laxa , often pendulous, hip apex without short neck; hip pedicels slightly inflated at base; sepals abaxially, receptacle and pedicel glandular or glandless together, the glands in the pedicel sometimes shed at anaphase. ( Table 2 ). Description: —Shrubs, erect, 2.5–3 m tall, basal branching. Branchlets slender, brownish red; branchial spines are rare, scattered, rarely opposite, pale yellow and white, unequal in length, slender, broad at base, apex slightly downward curved. Leaflets 5–9, usually 7, elliptic, obovoid, ovoid or oblong, 0.6–2 × 0.5–1 cm , abaxially sparsely pilose, adaxially smooth; leaf margin simple serrate, often entire subbase one-third. Stipules usually wider, base mostly adnate to petiole, free portion ovate, triangulate, margin glandular spot. Flowers often solitary, sometimes 2–3 in corymbose cymes, (3) 3.5–6.5 (7) cm in diam; pedicel 1.5–3.5 cm , pedicel and calyx tube glabrous or tomentose and sparsely glandular hairs; bracts ovate, margin glandular teeth, abaxially with distinct midrib and lateral veins; sepals long lanceolate, margin entire, apex elongated widened into appendages, abaxially glandular and densely tomentose, adaxially densely pubescent, margin more densely; petals white, sparse pink,or pale pink, at bud stage, petal tips are often pink or pale pink. Hip subglobose or ovoid, red, shiny, 1–2.1cm in diam, 1.5–2 cm long, sepals persistent and spreading; fruit pedicel straight or bent. TABLE 2. Differences in morphological characteristics between R. tomurensis and R. laxa .

R. tomurensis	R. laxa
Prickle	Quantity Prickle length	Rare 0.6–1.6 cm	More than R. tomurensis 0.3–1.4 cm
Apex morphology	Bending is not significant	Usually bend down
Leaflet	Margin	Subbase 1/3 often entire	Serrated margin, few subbase 1/4 entire
Growth way	Often solitary, sometimes 2–3 in corymbose cymes	Often 3–6 in corymb, sometimes solitary
Single flower diameter	(3)3.5–6.5(7) cm in diam	2.5–3.5(4) cm in diam
Flower	Receptacle color	Purplish red, occasionally green	Green
Pedicel length	1.5–3.5 cm	1–1.6 cm
Pedicel color	Purplish red or green	Green
Sepal color	Purplish red or green	Green
Size	1–2.1 cm in diam	1–1.8 cm in diam
Hip	morphology Hip pedicel length	Subglobose or ovoid, apex without a short neck 1.5–3.5 cm	Oblong or ovoid, apex with a short neck 1–1.6 cm
Hip pedicel morphology	Slightly inflated at base, often pendulous	No inflating at base
Gland	sepals abaxially, receptacle and pedicel glandular or glandless together, the glands in the pedicel sometimes shed at anaphase.	No glands or only the receptacle and pedicel have glands, and sepals abaxially, receptacle and pedicel sometimes glandular together

Distribution and habitat: —This species is produced in the Tuomuerfeng Natural Preservation Areas of Wensu County in Aksu Perfecture, the Pamir Plateau Mountain Area of Kizilsu Kirgiz Autonomous Prefecture, Tajik Autonomous County of Taxkorgan in Kashgar Prefecture and the south slope of Duku Highway, Xinjiang Uygur Autonomous Region. It borns in arid mountains, river valleys and riparian thickets, at elevations between 1700 m and 3000 m . The associated woody plants in this area are R. laxa , R. albertii , Berberis sp. , Caragana sp. , etc. Phenology: —Flowering from June to July, fruiting from August to October. Etymology: —The specific epithet refers to the distribution where the new species was first discovered. Paratypes : — CHINA . Xinjiang Uygur autonomous region, Akesu Prefecture , Wensu County , Tuomuerfeng Natural Preservation Areas , in river valleys, ca. 1800m , 24 September 2017 , L. Luo , C. Yu , Y. J. Sui , F. Yang & S. Zhao 171023 (BJFC00107688!); the same locality, 8 June 2017 , L. Luo , C. Yu , Y. J. Sui , F. Yang & S. Zhao 171024 (BJFC00107671!) . Conservation status: —Based on currently available data, the species should be assigned to the ‘Data Deficient’ (DD) category of IUCN (2022) . There is little human interference in this species’ distribution areas, so these populations are not easy to be destroyed.