Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

  Quercus x diegoi
Author F.M. Vazquez, C. Pinto-Gomes & al. Folia Bot. Extrem. 8: 95 (2014)
Synonyms Q. fruticosa Lam. X Q. pyrenaica Willd.

Diagnosis : Arbor mediocris, 4-6 m, cortice rimoso nigricante, ramis griseis pubescentis, ramulis petiolisque fuscescenti-tomentosis; foliis 3,5-6(7) x 1-3,5(4,2) cm, juvenilibus utrinque tomento denso crasso, adultis crassiusculis supra obscure virentibus multistellato-pubescentibus subtus canescenti- et velutino-tomentosis, ovatis vel obovatis, breviter petiolatis 4-9 mm tomentosis, basi rotundatis, lobulatis vel serratis, lobis lineari-lanceolatis obtusis vel acutiusculis, inter Quercus lusitanica et Quercus pyrenaica. Sterilis
Local names
Range Estremadura (Spain)
Growth habit

up to 6 m.

Leaves 3,5-6 (-7) x 1-3,5(-4,2) cm, ovate to obovate, lobate or serrate, base and apex rounded, margin entire near base; young leaves pubescent adaxially; mature leaves glabrescent with multistellate hairs; abaxially greyish tomentose with numerous fasciate hairs, mixed with the same number of multistellate ones; simple hairs on veins; petiole tomentose, 4-9 mm long;
Fruits sterile, without fruits;

Bark, twigs and

bark fissured, blackish; mature twigs glabrous, greyish; young twigs pubescent, covered with greyish fasciate trichomes;
Hardiness zone, habitat rocky or clayish calcareous, moist soils;

-- Differs from Q. lusitanica (= Q. fruticosa) in having a longer petiole (less than 4-5 mm in fruticosa);
-- Differs from Q. pyrenaica in having smaller leaves with multistellate and fasciate hairs underneath (versus essentially fasciate in pyrenaica), and a shorter petiole.

Subspecies and