Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

  Quercus oocarpa
Author Liebm. 1854
Synonyms glabrescens Seem. 1854, non Benth. 1840
insignis var. ou subsp oocarpa (Liebm.) E.Murray 1983
warszewiczii Liebm. 1854
yunckeri Trel. 1938
Local names  
Range

Mexico (Chiapas, Guerrero, Jalisco, Nayarit); Guatemala; Costa Rica; Panama; 1200-2000 m;

Growth habit 6-25 m; trunk to 1 m in diameter and more;
Leaves 12-40 cm x 3-13; subevergreen; slightly coriaceous, chartaceous; oblong, obovate or elliptic; apex acuminate or acute; base cuneate, obtuse or cordate; margin thick, flat or remotely revolute, entire, slightly wavy or dentate, with 3-20 pairs of mucronate teeth; adaxially green slightly lustrous, almost glabrous, with stellate, sessile trichomes having few arms, mainly on the veins; abaxially yellowish green, slightly lustrous, with rough, sessile trichomes scattered on the blade, essentially on veins; 12-22 veins pairs; the net of the secondary and tertiary veins is conspicuous; epiderm papillose, not bullate; petiole 3-5 mm long, with a rough tomentum;
Flowers  
Fruits acorn flattened, 2-3 cm long, 2.5-5 cm wide; singly or paired on a 1-2 cm long peduncle; cup half-round 3-6 cm wide, with pubescent scales, enclosing 1/4 to 1/2 of the nut; maturation the same year, in October;

Bark, twigs and
buds

bark scaly, grey; twigs grey or yellowish, sulcate, 3-5 mm thick, with tomentum persistent more than one season, made of numerous, rough, multiradiate, sessile trichomes, 1 mm long; lenticels hardly visible; bud ovoid 4-7 mm long, brown, with scales pubescent along margins; stipules linear 1-1.3 cm long, pubescent, deciduous, sometimes persistent.
Hardiness zone, habitat  
Miscellaneous -- Section Quercus;
-- For Linares, J.L. 2005 (El Salvador), Q. oocarpa is a synonym of Q. insignis.
Subspecies and
varieties
 
Pictures