| Quercus x warburgii | |
| Author | A. Camus 1939 Chênes Texte 2: 621, 793 |
| Synonyms | robur
x rugosa = obtusata Henry, not Bonpl. |
| Local names | |
| Range | |
| Growth habit | tall semi-evergreen tree; |
| Leaves | 6-12 cm long, 3-7 cm wide; leathery, obovate to oblanceolate; apex rounded; base tapered, sometimes weakly auricled; margin with shallow, small lobes; dull green, rough above; lighter green beneath; both sides glabrous; copper-coloured leaves in spring; |
| Flowers | |
| Fruits | 2.5 cm long, single or paired; rather thin stalk; cup hemispherical enclosing 1/3 of nut; |
|
Bark, twigs and |
young shoots glabrous, greenish brown; |
| Hardiness zone, habitat | hardy zone 7; |
| Miscellaneous | -- Before
1939, date of taxon description by A. Camus, it was named Q.obtusata
; in 1933, Warburg admitted it is a hybrid; -- It is not quite sure that parents are robur and rugosa. -- At Cambridge, one of the 2 original trees (the other being at Kew) reaches 20 m high, for a trunk 2m in diameter. |
| Subspecies and varieties |
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