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Malus

Malus is a genus of 32–57 species of small deciduous trees or shrubs in the Rosaceae family, including domesticated and wild apples. These trees typically grow 4–12 meters tall and have serrated leaves and corymbs of flowers that can be white, pink, or red. Cross-pollination by insects, particularly bees, is essential for many apple species as they are self-sterile.

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13 views1 page

Malus

Malus is a genus of 32–57 species of small deciduous trees or shrubs in the Rosaceae family, including domesticated and wild apples. These trees typically grow 4–12 meters tall and have serrated leaves and corymbs of flowers that can be white, pink, or red. Cross-pollination by insects, particularly bees, is essential for many apple species as they are self-sterile.

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Malus (/ˈmeɪləs/[3] or /ˈmæləs/) is a genus of about 32–57 species[4] of small deciduous trees or shrubs

in the family Rosaceae, including the domesticated orchard apple, crab apples (sometimes known in
North America as crabapples) and wild apples.

The genus is native to the temperate zone of the Northern Hemisphere.

Description

Apple trees are typically 4–12 metres (13–39 feet) tall at maturity, with a dense, twiggy crown. The
leaves are 3–10 centimetres (1+1⁄4–4 inches) long, alternate, simple, with a serrated margin. The flowers
are borne in corymbs, and have five petals, which may be white, pink, or red, and are perfect, with
usually red stamens that produce copious pollen, and a half-inferior ovary; flowering occurs in the spring
after 50–80 growing degree days (varying greatly according to subspecies and cultivar).[citation needed]

Many apples require cross-pollination between individuals by insects (typically bees, which freely visit
the flowers for both nectar and pollen); these are called self-sterile, so self-pollination is impossible,
making pollinating insects essential.[5]

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