Quercus robur L.

Europe except regions bordering on the Mediterranean Sea; continental Spain; NE Russia; SW Asia; North Africa; 0-1000 m;

30 m tall and more; trunk to 3 m in diameter; crown broadly domed;

5-12(-17) x 3-8(-11) cm; base auricled, asymmetrical; 2-5 pairs of rounded lobes, with sinuses obtuse and variable in depth; the blade is wider near apical 1/3; almost glabrous on both sides (possible uniseriate and solitary trichomes adaxially; the same ones abaxially, mostly on the midrib and at axils, and a lack of wax on the stigmas); dark dull green above; pale glaucous beneath; 5-7 vein pairs; petiole half-round in cross-section, hairless, yellowish, 0.4-0.7 cm long;

spring; male catkins yellow green, 2-6 cm long, with axis hairless; male perianth with 5-8 hairless stamens; pistillate inflorescences 3-10 cm long, hairless; female perianth with 4-6 short lobes;

acorn 1.5-4 cm, ovoid; dark brown; paired or several together on a long, thin, 4-10 cm long peduncle; enclosed 1/4 to 1/2 by cup; cup half-round, with triangular, appressed, slightly tomentose scales; maturing in 1 year;

– A. Camus : n°163 ; – Sub-genus Quercus, Section Quercus, Series Roburoid; – “lanuginosa” is a term frequently used by Authors, so it is better not to use it, in order to avoid confusions ! - Q. lanuginosa Franchet 1899 nom. illeg. = Q. franchetii - Q. lanuginosa (Lam.)Thuill.1799 nom. illeg. = Q. pubescens - Q. lanuginosa Beck 1890 nom. illeg. = Q. robur (sic !) - Q. lanuginosa sensu Lam. 1778 nom. illeg. = Q. cerris L. 1753 - Q. lanuginosa D.Don 1825 nom. illeg. = Q. lanata – The natural hybrids of Q. robur are : Q. x andegavensis , Q. x cantabrica , Q. x coutinhoi , Q. x gallaecica , Q. x haynaldiana , Q. x kerneri , Q. x rosacea , Q. x turneri – Q. medwedewii Sosnowsky 1943 is for Menitsky an ecotype of Q. robur , in the Teberda River Valley (Caucasus), but for todays Authors and Botanists (Galushko, Melamud) this taxon is a true species, differing from robur in its small, greyish leaves and the short peduncle. Do not confuse the name “ medwedewii “ with “ medwediewii “ witch is the name given by A. Camus to a subspecies of Q. petraea ! – OOTW reports hybrid: Q. × pendulina (Q. robur × Q. virgiliana) – OOTW reports hybrid: Q. × thellungii (Q. pubescens × Q. robur × Q. petraea) [syn. Q. × helvetica; complex triple hybrid]