Oaks of the World

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  Quercus dilacerata

Hickel & A. Camus 1929 Fl. Indo-Chine 5: 960

Local names
Range Vietnam; 1800 m;
Growth habit 12-15 m; trunc to 1.20 m girth;

10-13 cm x 3-4; oblong-lanceolate or oblanceolate; base long attenuate; apex slightly acuminate; both side glabrous or nearly so; adaxially lustrous; beneath dull; margin not undulate, serrate in the apical 1/3; 12-14 pairs of secondary veins, slightly impressed above, prominent abaxially, at an angle of 30-34° from midrib; tertiary veins visible beneath, most of them at a right angle with lateral veins; petiole 1-1.4 cm long, hairless;

Flowers 3 styles, short and glabrous; thick stigmas;

acorn subglobose, 2 to 3 on a 1-3 cm long peduncle, hairless except near mucro, brown; cupule thick, covering 2/3 of the nut, 1.5-2 cm in diameter, almost half-round, with 6-8 concentric rings of scales strongly indented at margin; basal scar convex; cotyledons free; maturing in 2 years;

Bark, twigs and

twig golden tomentose at first, becoming hairless; bu ovoid, densely whitish tomentose;
Hardiness zone, habitat deep clay soil, in wet climate;

-- A. Camus : tome 1, p. 214, n° 16
-- Sub-genus Cerris, section Cyclobalanopsis;
-- Threatened (IUCN Red List Category : CR)

-- This taxon, often considered as synonym of Q. langbianensis, is today included by Binh & Ngoc 2018 in the "Q. langbianensis Complex"


Subspecies and