Oaks of the World

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  Quercus dalechampii
Author Tenore 1830 Index Seminum (NAP) 1830: 15
Synonyms lanuginosa 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;

Range Central 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, habitat prefers dry, rocky soils;

-- Sub-genus Quercus, Section Quercus, Series Roburoid;
-- 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.
Moreover, the trees from Central Europ belonging to Q. petraea s.l. and named "Q. dalechampii" have been studied by Peter Kucera (Slovak Academy of Sciences 2018) who suggests naming them Q. banatus P. Kucera, nom. nov. and to give up with the confusing term "dalechampii".

Subspecies and