Oaks of the World

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 Quercus dalechampii
Author Tenore 1830 Index Seminum (NAP) 1830: 15
Synonymslanuginosa subsp dalechampii (Ten.) A.Camus 1936
robur var. dalechampii (Ten.) Fiori & Paol. 1908
petraea var. dalechampii (Ten.) Cristur. 1972
sessileis var. aurea (Wierzb. ex Rochel) Schur 1857
Local names

Oak of Daléchamp;

RangeCentral and SE Europe to Austria and Sicily; 800-1300 m;
Growth habit 
Leaves 6-15 cm long, 4-10 cm wide; resembles Q.petraea, but leaves are thinner, obovate, , more lobed (3-6 pairs of narrow, irregular, subacute lobes, the lobe at the middle being often lobulate), base rounded or cordate; hairless above, slightly pubescent beneath (less than in Q.pubescens); petiole glabrescent 1.5-3 cm;
Flowers male with 8-10 stamens shorter than the perianth; rachis of the female catkin 0.5-6 cm long, bearing 1-5 flowers;
Fruits acorn 1.2-2.3 cm long; cup halfround, with diamond-shaped, warty, slightly hairy, greyish scales; enclosed 1/3 to 2/3 in the cup.

Bark, twigs and

bark very thick, deeply furrowed, brown or blackish; twigs hairless; terminal buds often with persistent stipules;
Hardiness zone, habitatprefers dry, rocky soils;

-- this taxon is perhaps a hybrid between Q. pubescens and Q.petraea; it shows, like Q.pubescens, buds often silky, leaves with tertiary veins and pubescence beneath; like Q.petraea, it shows a long petiole, and mature leaves nearly glabrous;
-- for Govaerts & Frodin (1998), it is a true species.
-- for Menitsky (1974), it a synonym of Q.petraea subsp medwediewii, itself product of the introgression of genes of Q.pubescens into Q.petraea.
for recent Authors (Di Pietro 2012), this taxon belongs to the Q. pubescens Group, and one must consider that trees featuring glabrous new twigs and leaves must be placed as belonging to Q. petraea s.l.

Subspecies and