Oaks of the World

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  Quercus rotundifolia
Author Lam. 1785 Encycl. 1: 723
Synonyms ilex var. rotundifolia (Lam.) Trab. in Batt. & Trab. 1905
ballota Desf. 1791
ilex subsp ballota (Desf.) Sampaio 1909
avellaniformis Colmeiro & Boulelou 1854
ilex subsp. rotundifolia (Lam.) O.Schwarz ex Tab.-
Morais 1940
ilex var. ballota (Desf.) A.DC 1864
alzina Lapeyr. 1813
Local names
Range South Europe, Algeria, North Africa; 0-2200 m;
Growth habit 10 m tall;
Leaves 1.5-4 cm, rounded on young trees, becoming oval and obtuse; margin sometimes pubescent and toothed (always toothed when young); ash-green or glaucous, slightly pubescent above; pubescent and whiter beneath than those of Q. ilex, with stellate trichomes (9-10 rays, 135-150 µm long); petiole 3-12 mm long; only 5-8 vein pairs, not evident beneath;
Flowers male perianths with glabrous, obtuse lobes; 5-12 stamens;
Fruits acorn larger than ilex, and sweet; apex round to pointed;

Bark, twigs and
buds

bark, buds, twigs like Q. ilex;
Hardiness zone, habitat not quite hardy;
Miscellaneous -- Today, this taxon is considered as a true species.
-- See HERE the main differences with Q. ilex

-- The natural hybrids of Q. rotundifolia are : Q. x airensis, Q. x autumnalis, Q. x diosdadoi, Q. x mixta, Q. x senneniana

Subspecies and
varieties
-- there are some varieties :
_var. planifolia : leaves 4 cm long, flat, orbicular, entire or nearly so, dark green on both sides, hairless (some stellate hairs beneath); soft bark.
_ var. ballota : leaves elliptic-oval, 1.5 times longer than  wide.
_ var. parviflora : leaves entire, lanceolate, 2-3 X 0.7 cm, with yellowish white pubescence.
_ var. grandifolia : leaves 6 x 4 cm.
_ var. macrocarpa : very big, elongate, sweet acorn; South Spain.

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