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An oak is a tree or shrub in the genus Quercus (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 600 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably Lithocarpus (stone oaks), as well as in those of unrelated species such as Grevillea robusta (silky oaks) and the Casuarinaceae (she-oaks). The genus Quercus is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America contains the largest number of oak species, with approximately 90 occurring in the United States, while Mexico has 160 species of which 109 are endemic. The second greatest center of oak diversity is China, which contains approximately 100 species. Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. Many deciduous species are marcescent, not dropping dead leaves until spring. In spring, a single oak tree produces both male flowers (in the form of catkins) and small female flowers. The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on their species.
Great elm. - Elm planted with flowers.
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Great elm.

Added 3 weeks ago by Zeta

116

Animals. - A lions resting on the tree.
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Animals.

Added month ago by Grażyna

64

Stopped in Time ... - Beauty and Delicate Ease of Moment
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Stopped in Time ...

Added month ago by SU-

29

Lone Tree. - A lonely tree among fields.
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Lone Tree.

Added 2 months ago by Zeta

56

The market in Szydłowiec - Szydłowiecki market square, city hall
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The market in Szydłowiec

Added 4 months ago by Ewela

155

Tree shaker - colorful jigsaw puzzle
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Tree shaker

Added year ago by andi

81

Jigsaw puzzle - colorful jigsaw puzzle
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Jigsaw puzzle

Added year ago by andi

17

Nicaragua tree - A tree in a state in Central America, located between Honduras in the north and Costa Rica in the so
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Nicaragua tree

Added year ago by tosia

269

tree for children - deciduous tree game for children
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tree for children

Added year ago by mariolka

68 1

Kolorowy salon - Ogród barw w salonie.
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Kolorowy salon

Added over a year ago by aberade

94

wyspa dębów - niezwykłe,drzewo,rozłożyste,gałęzie
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wyspa dębów

Added over a year ago by wieslawa

140

Hawaje, to jest to - taki widok tylko na Hawajach
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Hawaje, to jest to

Added over a year ago by Romina

248

podlaskie klimaty - z daleka widać panoramę wsi
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podlaskie klimaty

Added over a year ago by Regina

165

Lipa - drzewo - Poukładaj puzzle.Obraz przedstawia Lipę.
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Lipa - drzewo

Added over a year ago by Dominik

67

buk drzewo - Stwórz własne puzzle, zagraj i baw się!
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buk drzewo

Added over a year ago by Emilia Jóźwiak

51

kasztanowiec - drzewo - Poukładaj puzzle. Obrazek przedstawia drzewo kasztanowiec.
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kasztanowiec - drzewo

Added over a year ago by Igor Sikora

58

dąb - drzewo - Poukładaj puzzle we właściwej kolejności ! Obraz przedstawia dąb.
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dąb - drzewo

Added over a year ago by Klaudia Czapiewska

320

lipa - drzewo - Poukładaj puzzle. Obraz przedstawia drzewo lipa.
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lipa - drzewo

Added over a year ago by Igor Sikora

92

drzewo olbrzym - wiele odnóg,zielone,brązowe,dające cień
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drzewo olbrzym

Added over a year ago by wieslawa

309

Italia-Tivoli;Villa d'Este - Italia-Tivoli;Villa d'Este
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Italia-Tivoli;Villa d'Este

Added over a year ago by Anabell

34

stare drzewo,wygięte konary - stare drzewo,wygięte konary,wzgórze
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stare drzewo,wygięte konary

Added over a year ago by Ilona

137

Kwitnące drzewo - Czereśnia w wiosennej szacie
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Kwitnące drzewo

Added over a year ago by Iwona

77

aleja z krzywymi drzewami - aleja z krzywymi drzewami
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aleja z krzywymi drzewami

Added over a year ago by mamusia

226