- Quercus robur has a wide spreading crown, short sturdy trunk, and deeply fissured gray brown bark. It can grow to 140 ft (42.7 m) tall with a rounded spread of 80 ft (24.4 m) or more, but is usually smaller in cultivation. It is native to Asia and Europe.
- The small deciduous leaves, 3-5 in (7.6-12.7 cm) long, with 3-7 pairs of rounded lobes, and extremely short petioles. They remain deep green long into autumn before turning brown and then persisting on the tree well into winter.
- The flowers are hanging catkins which appear with the emerging leaves in early spring.
- The fruits are acorns which are elongate, about 1 in (2.5 cm) long, with a cup that covers 1/3 of the nut. They are born singly or in clusters of 2-5 which dangle on a single long 1-4 in (5.1-10.2 cm) peduncle.
- Ecological Threat
- Q. robur is easily grown in average, medium, well-drained soils in full sun. It prefers moist well-drained soils, but adapts to a wide range of soil conditions. Can take up to 25-30 years for this tree to bear a first crop of acorns.
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EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
Invasive Listing Sources
CategoriesCategory: Hardwood Trees
|Common Name Reference:|| USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|