taxonID	type	description	language	source
96F587139F285FF3BB78857B00B7396A.taxon	description	Fig. 4	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	diagnosis	Diagnosis. Quercus sontraensis is morphologically similar to Q. cambodiensis and Q. langbianensis in leaf shape (lanceolate to elliptic), cupules with 6 - 9 rings and cupule enclosing less than 1 / 2 of the nut. However, Q. sontraensis is distinguished from Q. cambodiensis by its leaf margin regularly and distinctly serrate on the upper 1 / 3 - 1 / 4 (- 1 / 5) of the lamina (vs. almost entire or with a few low teeth in upper 1 / 4), bowl-shaped cupule (vs. cup-shaped), cupule bract margin distinctly toothed in all rings, except two upper rings (vs. entire, except distinctly toothed in two lower rings) and differs from Q. langbianensis in having bowl-shaped cupule (vs. cup-shaped), cupule bract margin distinctly toothed in all rings, except two upper rings (vs. distinctly toothed in all rings), broadly ellipsoid nut (vs. obovoid to ellipsoid) and slightly convex nut scar (vs. convex).	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	materials_examined	Type. Vietnam. Da Nang City, Son Tra Peninsula, Son Tra Nature Reserve, in evergreen forest, alt. 340 m, 16 ° 08 ' 22.90 " N, 108 ° 15 ' 28.85 " E, 9 October 2016, Son H. T., Binh H. T., Ngoc N. V. QC 201 (holotype DLU!, isotypes HN!, VNM!, VAFS!).	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	description	Description. Tree, 12 m tall. Terminal and lateral buds ovoid, 3 - 5 mm long, 1.5 - 3 mm in diam., scales in 3 - 5 rows, imbricate, ovate-triangular, ca. 1.5 x 2 mm, apex obtuse, margin yellowish-brown ciliate, appressed hairy on both surfaces. Young twigs greyish-brown, 1.5 - 2 mm in diam., densely curly golden hairy, sometimes sulcate, old twigs greyish-brown, glabrous, lenticellate. Leaves alternate; blades elliptic to elliptic-lanceolate, 7 - 12.5 x 2.2 - 3.5 cm, acuminate or sometimes acute at apex, cuneate at base, margin regularly and distinctly serrate in the upper 1 / 3 - 1 / 4 (- 1 / 5), densely golden hair on both surfaces when young, glabrescent, midrib sunken adaxially, prominent abaxially, lateral veins (8 -) 11 - 14 pairs, straight and running into the teeth of margin, slightly sunken adaxially, prominent abaxially, at an angle of 45 - 50 (- 52) degrees from midrib, tertiary veins scalariform, faint on the upper surfaces and conspicuous on the lower surfaces; petioles (0.7 -) 1 - 1.5 cm long, densely curly golden hairy when young, soon glabrous. Male inflorescence 7 - 9 cm long. Female inflorescence 2.5 - 3.5 cm long, female flowers solitary. Infructescences axillary or terminal, erect, rachis 0.5 - 0.8 (- 1.2) cm long, 3 - 4 (- 6) mm in diam., densely golden hairy. Fruits 1 - 3, 3 - 3.3 cm long (including cupule), sessile; cupules bowl-shaped, 1.2 - 1.7 (- 1.9) cm long, 1.3 - 2.2 cm in diam., enclosing 1 / 3 of the nut when mature, both outside and inside covered with densely appressed yellowish-brown hairs, wall ca. 1.5 - 3 mm thick, comprising scales, scales arranged in 7 - 8 rings, margin of the ring distinctly toothed in all rings, except two upper rings; nut broadly ellipsoid 2.3 - 2.6 cm long, 1.7 - 2.0 cm in diam., densely golden hairy, apex nearly flat, densely appressed curly golden hairs around stylopodia, stylopodia up to 1.5 mm long, basal scar 1.1 - 1.3 cm in diam., slightly convex, glabrous.	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	distribution	Distribution. Vietnam. Da Nang City, Son Tra Nature Reserve.	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	etymology	Etymology. The specific epithet is derived from the district name of the type locality, Son Tra Nature Reserve, Son Tra Peninsula, Da Nang City, Central Vietnam.	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
96F587139F285FF3BB78857B00B7396A.taxon	materials_examined	Additional specimens examined. Vietnam. Da Nang City, Son Tra Peninsula, Son Tra Nature Reserve, in evergreen forest, 385 m elev., 16 ° 07 ' 41.7 " N, 108 ° 15 ' 55.7 " E, 20 September 2019, Son H. T. QC 202 [fr.] (DLU!, VAFS!); ibid., 428 m elev., 16 ° 07 ' 00.3 " N, 108 ° 17 ' 40.5 " E, 20 September 2019, Son H. T. QC 203 [fl.] (DLU!, VAFS!).	en	Ngoc, Nguyen Van, Binh, Hoang Thi, Son, Hoang Thanh, Suyama, Yoshihisa, Yahara, Tetsukazu (2022): A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam. PhytoKeys 206: 61-73, DOI: http://dx.doi.org/10.3897/phytokeys.206.85635, URL: http://dx.doi.org/10.3897/phytokeys.206.85635
