Quercus dalechampii

	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 aurea Wierzb. ex Rchb. 1840 sessilis var. aurea (Wierzb. ex Rochel) Schur 1857
Local names	Oak of Daléchamp;
Range	Central and SE Europe to Austria and Sicily; 800-1800 m;
Growth habit	to 20 m;
Leaves	6-15 cm long, 4-10 cm wide; the greatest width of the leaf blade is located in the distal third of the leaf; 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, strongly pubescent beneath (but less than in Q. pubescens); petiole glabrescent 1.5-3 cm;
Flowers	male catkin 3-5 cm, with 8-10 stamens shorter than the perianth; rachis of the female catkin 0.5-6 cm long, bearing 1-5 flowers;
Fruits	acorn ovoid to el1ipsoid, rounded or truncate at apex, mucronate, 1.2-2.3 cm long; cup halfround, with diamond-shaped, warty, densely hairy (less than in Q. pubescens), greyish scales; enclosed 1/3 to 2/3 in the cup. Mature in October.
Bark, twigs and buds	bark very thick, deeply furrowed, brown or blackish; yoiung twigs pubescent, then hairless; terminal buds often with persistent stipules;
Hardiness zone, habitat	prefers dry, rocky, siliceous soils;
Miscellaneous	-- 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, according to A. Camus, 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. to give up with the confusing term "dalechampii". For POWO this species is named Q. aurea Wierzb. 1835 which has many synonyms, among them : banatus, dalechampii var. aurea, robur var. aurea, sessilis var. aurea, strigosa Wierzb. and many varieties or forma of dalechampii (var. aurea, var. breviloba, var. cochleata, var. grandifolia, f. apatini, f. lancifolia, etc...).
Subspecies and varieties
Pictures	More pictures Here

Oaks of the World