Oaks of the World

General data Classifications List of species Local names Back to
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  Quercus x andegavensis
Author Hy 1895
Synonyms pyrenaica x robur (pyrenaica dominant)
= x henriquezii Franco & Vasc. 1954
= x rechinii Hy 1896 (when robur is dominant)
Local names  
Range France, Spain (Navarra, near Roncesvalles);
Growth habit  
Leaves 6-10 cm x 3-5; pinnatilobate; dark green above, becoming nearly hairless; below with thick tomentum at first, then glabrescent with only rare axil tufts; apex rather obtuse; base cordate or truncate, often asymmetrical; lobes ovate, obtuse, sometimes lobulate; 5-8 vein pairs, prominent below, with intercalary veins; petiole tomentose 0.5-1 cm long;
Flowers  
Fruits acorn on a tomentose peduncle 1-3 cm long; cup with tomentose scales ending in elongate obtuse tip;

Bark, twigs and
buds

twig tomentose; bud 4-8 mm long, with tomentose scales ciliate at rim; stipules sometimes persistent;
Hardiness zone, habitat  
Miscellaneous

-- Actually one must distinguish Q.x rechinii, in which Q.robur is dominant = twigs glabrous; bud glabrescent, 3-5 mm; leaves 7-12 x 5-7 cm, glabrous on both sides (or sometimes some simple hairs along midrib), lobes often lobulate, 5-8 vein pairs with numerous intercalary veins; petiole glabrous or nearly so, 3-7 mm long; acorn with hairless, 2-4.5 cm peduncle;

-- The hybrid between Q. pyrenaica and Q. robur subsp estremadurensis has a name : Q. x subandegavensis A. Camus 1935
acute lobes, foliar margin more or less pinnate, adaxially glabrescent, abaxially tomentose, petiole short and reddish;

Subspecies and
varieties
-- nothosubsp. henriquezii (Franco & Vasc.) Rivas-Mart. & Saenz 1991
= x henriquezii Franco & Vasc. 1954
= Q. pyrenaica X Q. robur subsp broteroana
twigs with partly deciduous indumentum (stipitate fasciate hairs); blade with a polymorphic shape, pinnatilobate with 3-6 pairs of irregular rounded lobes; dark green, pubescent (fasciate and simple hairs) adaxially; abaxially glaucous with denser pubescence, with many fasciate hairs; petiole sulcate, 4-16 mm long;
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