Quercus sontraensis

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.