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Quercus trungkhanhensis | |
Author | Binh & Ngoc 2018 |
Synonyms | |
Local names | |
Range |
North-East Vietnam : Trung Khanh District, Cao Vit Gibbon Conservation Area, Cao Bang Province; 760 m; |
Growth habit | 5-10 m. tall; |
Leaves |
9-12.5 cm X 2.5-5.8; evergreen; leathery; ovale or elliptic-ovate; apex acute acuminate; base rouded or slightly cordate; margin serrate in 2/3 to 4/5 apically; adaxially hairless except some stellate hairs near base; abaxially glabrescent or soon glabrous except some persistant hairs at axils; fruit-bearing twigs have glabrous leaves; 8-10 vein pairs, at an angle of 50-60° with the midrib, raised on both faces, as for the midrib; petiole 1.8-2.4 cm long, at first yellowish pubescent, then glabrescent. |
Flowers | inflorescences erect, terminal or at axils; |
Fruits |
acorn cylindrical, 1-1.5 cm long X 1-1.2 wide, with apex truncate or slightly depressed; stylopodium 2 mm lon; solitary or paired, on a 1-1.5 cm long stalk; sessile; cup bowl-shaped, 8-10 mm high X 12-14 mm wide; cupscales with blackish, acuminate apex, pubescent both sides; acorn enclosed 1/3 or 1/2 by cup; basal scar 5-6 mm in diameter; |
Bark, twigs and |
bark pale grey, with deep vertical furrows; young twig with stellate, appressed, yellowish-brown hairs, then glabrescent; some lenticels; bud broadly ovoid, 3-4 mm long X 2-3 mm wide; |
Hardiness zone, habitat | |
Miscellaneous |
-- Sub-genus Cerris, section Ilex |
Subspecies and varieties |
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Pictures |
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