taxonID	type	description	language	source
077082FA4BD458FAA6F7565B75B40D28.taxon	description	Fig. 2	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	diagnosis	Diagnosis. Quercus mangdenensis is morphologically most similar to Q. bidoupensis and Q. kontumensis with a lanceolate to oblong-lanceolate leaf shape, cuneate leaf base, and bracts of cupule fusing in 5 - 7 rings. However, Q. mangdenensis is distinguished from Q. bidoupensis by its entire leaf margin (vs. undulate, distinctly serrate in the upper 1 / 2), longer petioles 2.5 - 4 cm long (vs. 1.3 - 2 cm long), broadly bowl-shaped cupules (vs. obconical-shaped), larger cupule (2.6 - 3.5 cm high x 4 - 5 cm in diam. vs. 1.3 - 1.5 cm high x 1.3 - 1.7 cm in diam.), enclosure of cupule (1 / 5 vs. 1 / 3 of the nut), cylindrical-ellipsoid nut (vs. ovoid), larger nut (4.5 - 7.5 cm high x 3 - 4 cm in diam. vs. 2.2 cm high x 1.4 cm in diam.), and flat basal scar of the nut (vs. convex). It differs from Q. kontumensis in having larger cupule enclosing 1 / 5 of the nut (2.6 - 3.5 cm high x 4 - 5 cm in diam. vs. 1 - 1.2 cm long x 1.5 - 2 cm in diam., enclosing 1 / 2 of the nut), larger cylindrical-ellipsoid nut 4.5 - 7.5 cm high x 3 - 4 cm in diam. (vs. cylindrical-ovoid, 2 cm high x 1.5 cm in diam.), and scales of cupule fusing into 5 - 7 entire ridges (vs. undulate) (Table 1).	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	materials_examined	Type. Vietnam. Kontum Province, Kon Plong District, Mang Den Town, alt. 1179 m, 14 ° 36 ' 39.1 " N, 108 ° 15 ' 00.5 " E, 23 July 2022, H. T. Binh & N. V. Ngoc QC 204 (holotype DLU!; isotypes HN!, VNM!)	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	description	Description. Tree, evergreen, 20 - 25 m tall, 60 - 80 cm girth. Bark whitish gray. Buds perulate, globose to oblate, 2.5 - 4 mm high, 2.5 - 3.5 mm in diam., bud scales imbricate, in 2 - 3 rows, ovate-triangular, 2.0 - 3.0 x 1.5 - 2.0 mm, apex obtuse, margin ciliate, covered with appressed white hairy outside, glabrous inside. Young twigs dark pale green, hairy, old twigs grayish-brown, glabrous, sometimes sulcate, lenticellate. Leave alternate; blades thickly coriaceous, lanceolate to oblong-lanceolate, (5.5 -) 11 - 16.5 (- 19.5) x (2.6 -) 3.5 - 5.5 cm, acute at apex, broadly cuneate at base, margin entire, glossy green adaxially, bright green abaxially, conspicuously pale creamy brown to yellowish brown in sicco, glabrous on both surfaces, midrib slightly raised on the upper surface, prominently raised on the lower surface, lateral veins (5 -) 7 - 9 pairs, prominent on the lower surface, at an angle of 45 - 55 degree from the midrib, straight and then curved near margin, tertiary veins scalariform-reticulate, faintly visible on both surfaces; petioles (1.3 -) 2.5 - 4 cm long, yellowish brown when dry, glabrous. Male and female inflorescences not seen. Infructescences axillary or pseudo-terminal (sometimes in upper leaf-scars), erect, rachis 1 - 1.5 cm long, 1 - 1.3 cm in diam., woody, glabrous, dark yellow in vivo, yellowish brown in sicco, lenticellate. Mature fruits 6 - 10.5 cm high (including cupule), solitary, sessile on woody rachis; nuts cylindrical-ellipsoid, 4.5 - 7.5 cm high, 3 - 4 cm in diam., rounded at the top, white tomentose around stylopodia, stylopodia 1.5 - 2.5 mm long, basal scar 2 - 2.5 cm in diam., flat; cupules broadly bowl-shaped, 2.6 - 3.5 cm high, 4 - 5 cm in diam., enclosing 1 / 5 of the nut when mature, outside tomentose with reddish hairs to glabrous, inside with appressed densely reddish hairs, wall 0.5 - 1.3 cm thick, woody, bracts fusing and arranged in 5 - 7 ridges (rings), the rings' margin completely entire (without scale-like structure).	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	distribution	Distribution. Vietnam. Kon Tum Province, Kon Plong District, Mang Den Town (Fig. 1).	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	etymology	Etymology. The specific epithet is derived from its type locality, Mang Den Town, Kon Plong District, Kon Tum Province, Vietnam.	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
077082FA4BD458FAA6F7565B75B40D28.taxon	materials_examined	Additional specimens examined. Vietnam. Kontum Province, Kon Plong District, Mang Den, alt. 1168 m, 14 ° 36 ' 37.4 " N, 108 ° 15 ' 11.6 " E, 23 July 2022, H. T. Binh & N. V. Ngoc QC 205 [fr.] (DLU!, HN!, VNM!); ibid., 1180 m elev., 14 ° 36 ' 32.5 " N, 108 ° 15 ' 18.2 " E, 23 July 2022, H. T. Binh & N. V. Ngoc QC 207 [fr.] (DLU!, HN!, VNM); ibid., 1130 m elev., 14 ° 36 ' 36.5 " N, 108 ° 15 ' 31.3 " E, 23 July 2022, H. T. Binh & N. V. Ngoc QC 208 [fr.] (DLU!, HN!, VNM); ibid., 1065 m elev., 14 ° 36 ' 36.5 " N, 108 ° 15 ' 31.3 " E, 23 July 2022, H. T. Binh & N. V. Ngoc QC 209 [fr.] (DLU!, HN!, VNM!).	en	Ngoc, Nguyen Van, Binh, Hoang Thi (2022): Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam. PhytoKeys 215: 73-79, DOI: http://dx.doi.org/10.3897/phytokeys.215.93684, URL: http://dx.doi.org/10.3897/phytokeys.215.93684
