Acorn Oak Facts: Definition, Species

The Acorns Oak

Oak ( Quercus ) is a genus of trees in the family bokväxter with about 400 species. The genus occurs naturally in Eurasia, North Africa, North America, the Caribbean, Mexico, and south to Colombia.

Scientific name



The Acorn fruit, in the form of nuts, called acorns. They are egg-, cylinder-or cone-shaped, has cemented wall with yellow-brown to dark brown or reddish-brown color in the mature stage. The acorns, which can be included singly or in groups, can in some species become almost 4 cm in length but in others, they are less than 1 cm.

Some species

  • Oak ( Q. robur ), also known as sommarek, stjälkek, oak and common oak
  • Sessile oak ( Q. petraea ), also known as druvek and Vinterek, present in Sweden as well as oak
  • Cork oak ( Q. suber ) gives the cork and Quercus variabilis
  • Acorns from Quercus vallonea and Quercus macrolepis has commercial value as an ingredient in tanning.
  • The bark of kvercitronek or färgek ( Q. velutina ) leaves a useful feature yellow color
  • Turkey oak ( Q. cerris ), red oak ( Q. rubra ), blodek or scharlakansek ( Q. coccinea ), white oak ( Q. alba ) and Karrek ( Q. palustris ) occurs as ornamental and garden plants

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