Oaks of the World

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  Quercus gussonei

(Borzi) Brullo 1984 Not. Fitosoc. 19: 205 1984.

Synonyms cerris var. gussonei Borzi 1911 Bol. R. Orto Bot. Giard. Colon. Palermo 10: 65 1911.
Local names cerro di Gussone
Range endemic to Sicilia; 700-1000 m;
Growth habit reaches 25 m;

10-18 cm x 5-10, deciduous, oblong to elliptic, base truncate to cuneate, margin with 4-8 deep lobes (less deep than in Q. cerris), lobes acute or rounded, adaxially light green and glabrous, abaxially greyish pubescent; petiole 0.5-2 cm long;

Flowers male flowers with pubescent perianth, 5-6 stamens longer than perianth, with pubescent anthers; pistillate flowers 2 to 7 together on a tomentose rachis;

acorn oblong to ellipsoid, truncate-umbilicate at apex, 3-4.2 cm long, 1.8-2.3 cm wide, bigger than in Q. cerris ; cup halfround enclosing 1/3 to 1/2 of acorn , with long scales to 15 mm near the rim.

Bark, twigs and

bark thick, corky, greyish, fissured; young twig densely tomentose;
Hardiness zone, habitat

-- Sub-genus Cerris, Section Cerris
-- Often considered as a variety of Q. cerris, but for Plants of the World Online 2021 it is a true species, different in the port and some morphological features (leaves and fruits larger, marge strongly variable);

Subspecies and