Oaks of the World

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  Quercus estremadurensis
Author O. Schwarz 1935
Synonyms robur subsp. estremadurensis (O. Schwarz) A. Camus 1935
racemosa Brot. 1804 non Lam. 1785
robur subsp. broteroana auct. pl. non Schwarz 1935
robur var. conimbricensis Camus 1934
Local names
Range Central-West Iberian Penisula, specially Portugal
Growth habit reaches 20 m tall
Leaves 7-14 cm x 4-7; marcescent or sometimes evergreen; flat, rather irregular, rhomboid, slightly leathery; adaxially shiny and hairless; dull abaxially, hairless ou glabrescent (sometimes with multiradiate and/or simple trichomes, mainly on the midvein), almost glaucous; base auricled; margin sinuate-lobate with 6-7 unequal, short, pointed, sometimes mucronate lobes; sinus rather narrow, shallow; 6-8 veins pairs, sinuous, slightly or not prominent, at an acute angle with the midrib; no sinusal veins; tertiary veins thin; summer leaves are narrower, more irregular, with less secondary veins and some sinusal ones; petiole pinkish, short (5-15 mm)
Fruits acorn ovate-oblong, with persistent stylopodium; peduncle to 8 cm and more, slender, more or less glabrous; aborted acorns frequent; cup with numerous, appressed, pubescent scales, those of the base larger than those near the rib;

Bark, twigs and

tortuous twigs, slightly sulcate, with scattered round lenticels;
Hardiness zone, habitat

in deep valleys with constant moisture and temperature; mainly on siliceous soils;

Miscellaneous This taxon is, for the Spanish and Portuguese Authors, a true species, regarding its range, its habitat, its ecological behaviour, its morpholigical features (pubescence and shape of the leaves, among others), and the shape and development of its embryo.
Subspecies and