taxonID	type	description	language	source
EC6F7123EBD3D3CC8419103B5821FBB2.taxon	diagnosis	Diagnosis. Quercus xuanlienensis is morphologically similar to Q. edithiae of China and Vietnam in leaf size (7 - 15 x 3 - 5.8 cm), cuneate leaf base, petiole length (1.5 - 2.8 cm long), number of secondary veins (8 - 11 pairs), bowl-shaped cupule, ellipsoid to cylindrical-ellipsoid nut and basally convex nut but differs in leaf margin serrulate only at apical 1 / 5 - 1 / 7 (vs. serrate in the upper 2 / 3), entire bracts of cupule (vs. almost denticulate except basal 2 or 3 rings which is entire), cupule enclosing 1 / 5 of the nut (vs. enclosing 1 / 4 - 1 / 3 of the nut) and longer nut (5 - 6 cm long vs. 4 - 4.5 cm long).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EC6F7123EBD3D3CC8419103B5821FBB2.taxon	materials_examined	Type. VIETNAM. Thanh Hoa Province, Thuong Xuan District, Xuan Lien Nature Reserve, in evergreen forest around waterfall, alt. 810 m, 19 ° 52 ' 46.7 " N, 105 ° 11 ' 34.4 " E, 6 Mar. 2017, Binh HT, Ngoc NV, Bon TN V 6967 (holotype KYO!; isotypes DLU!, FU!, P!, VNM!).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EC6F7123EBD3D3CC8419103B5821FBB2.taxon	description	Description. Tree, ca. 18 m tall. Buds ellipsoid, ca. 9 mm long, ca. 4 mm in diam., scales imbricate, in 4 - 5 rows, ovate-triangular, ca. 3 x 2.5 mm, apex obtuse, margin ciliate, appressed whitish to yellowish brown hairy on both surfaces. Twigs glabrous when old, lenticellate. Stipules linear-lanceolate, 10 - 14 mm long, densely appressed hairy, glabrescent outside, glabrous inside. Leaves alternate; blade leathery, oblong-elliptic or obovate, (6 -) 8 - 11 (- 15) x 3 - 4.5 (- 5) cm, apex acuminate, acumen up to 0.6 cm long, base cuneate, margin recurved, serrulate in the upper 1 / 5 - 1 / 7, pale brown on the upper surface, yellowish brown to reddish brown on the lower surface when dry, glabrous on both surfaces; midribs + / - flat on upper surface, prominent and distinct on lower surface, lateral veins 8 - 11 pairs, prominent on lower surface, at an angle of 40 - 45 degrees from midrib, straight and running into the margin, tertiary veins scalariform, indistinct on upper surface, prominent and distinct on lower surface; petioles 1 - 2 cm long, glabrous. Male and female inflorescences not seen. Infructescences axillary or terminal, erect, rachis 8 - 10 mm long, 4 - 5 mm in diam., glabrous, brownish red when fresh, blackish when dried. Fruits 6 - 6.5 cm high (including cupule), solitary or twin, sessile; cupules bowl-shaped, 1.3 - 1.7 cm high, 1.9 - 2.1 cm in diam., enclosing ca. 1 / 5 of the nut when mature, outside whitish to yellowish brown tomentose to glabrous, inside densely appressed yellowish brown hairy, wall ca. 1 - 2 mm thick, comprising of bracts, bracts arranged in 7 - 8 rings, margin of rings entire; nuts ellipsoid to cylindrical-ellipsoid, 5 - 6 cm high, 2 - 2.3 cm in diam., apex acute, densely appressed yellowish brown hairy around stylopodia, with stylopodia up to 4 mm long, basal scar 9 - 10 mm in diam., convex, to 3 mm high, glabrous.	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EC6F7123EBD3D3CC8419103B5821FBB2.taxon	distribution	Distribution. Vietnam. Thanh Hoa Province, Thuong Xuan District, Xuan Lien Nature Reserve.	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EC6F7123EBD3D3CC8419103B5821FBB2.taxon	etymology	Etymology. The specific epithet is derived from the district name of the type locality, Xuan Lien Nature Reserve, Thuong Xuan District, Thanh Hoa Province, North Central Coast of Vietnam.	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EE464698F900583587155F201064C04A.taxon	materials_examined	Type. CHINA. " Fang-Cheng Hsien, Shi-Wan-Ta Shan ", alt. 200 - 250 m, in sparsely wooded ravine along stream on moist sites, 24 Mar. 1944, S. H. Chun 4772 (IBSC [catalogue no. 0039624, image!]).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EE464698F900583587155F201064C04A.taxon	materials_examined	Specimens examined in Vietnam. Ha Noi, Ba Vi District, Ba Vi National Park, in evergreen forest: alt. 600 m, 21 ° 04 ' 40.6 " N, 105 ° 22 ' 17.2 " E, 11 Sep. 2016, Binh et al. V 6044, V 6038 [fr.] (FU); alt. 703 m, 21 ° 04 ' 59.6 " N, 105 ° 22 ' 03.6 " E, 21 Sep. 2017, Yahara et. al. V 6981 [fr.] (DLU, FU); alt. 1023 m, 21 ° 03 ' 33.7 " N, 105 ° 21 ' 39.4 " E, 11 Sep. 2016, Binh et al. V 6031 [fr.] (FU).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
EE464698F900583587155F201064C04A.taxon	distribution	Distribution. China (Guangdong, Guangxi, Hainan) and Vietnam (Ba Vi National Park, Fig. 1).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
BAA4755AE045504EBE76BC5CB5D178BC.taxon	materials_examined	Type. CHINA. " Hsin-I Hsien, Ling-Tung Pao, Chung-Tung ", 3 Aug. 1931, C. Wang 31087 (holotype-IBK [catalogue no. IBK 00081941, image!], isotype-IBSC [catalogue no. 0117316, image!]).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
BAA4755AE045504EBE76BC5CB5D178BC.taxon	materials_examined	Specimens examined in Vietnam. Ha Noi, Ba Vi District, Ba Vi National Park, in evergreen forest: alt. 737 m, 21 ° 04 ' 33.88 " N, 105 ° 22 ' 03 " E, 12 Sept. 2016, Binh et al. V 6052, V 6053, V 6058 [fr.] (FU); alt. 1172 m, 21 ° 03 ' 34.1 " N, 105 ° 21 ' 54.1 " E, 11 Sep. 2016, Binh et al. V 6040 [fr.] (FU).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
BAA4755AE045504EBE76BC5CB5D178BC.taxon	distribution	Distribution. China (Guangdong, Guangxi, Guizhou, Hainan, Hunan) and Vietnam (Ba Vi National Park).	en	Binh, Hoang Thi, Ngoc, Nguyen Van, Bon, Trinh Ngoc, Tagane, Shuichiro, Suyama, Yoshihisa, Yahara, Tetsukazu (2018): A new species and two new records of Quercus (Fagaceae) from northern Vietnam. PhytoKeys 92: 1-15, DOI: http://dx.doi.org/10.3897/phytokeys.92.21831, URL: http://dx.doi.org/10.3897/phytokeys.92.21831
