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Red Maple

(Acer rubrum) 

Red Maples are easily recognisable deciduous trees which grow to 18-27m in height.

They are often found in swampy areas as well as near houses where they are used as decorative trees.

They differ from Sugar Maples in that the Red Maple’s leaves grow after they blossom.

Their leaves are red tinged in spring, green in the summer, then turn bright red in the fall

They have smooth, grey bark which becomes scaly on older trees.

Female maple flowers are bright red and have long stems.

The twigs are red, hairless with white specks.

Male maple flowers are greenish yellow with shorter stems.

Notice the leaf bud at the tip.

This shows a group of male flowers still in bud.

Notice how they appear red before blooming. This can cause confusion with the female flowers.

 

Trees may bear all male flowers, all female flowers or a mixture of both, but on any individual branch all of the flowers are generally of the same sex.

New leaves emerging from leaf buds

By June the male flowers have fallen and the female flowers have developed into seeds or ‘samaras’.

  Choosing your tree

  • Choose a tree with male flowers in an area that you visit regularly
  • Avoid trees which are within 10 metres of any buildings.
  • Tag your chosen tree using a ribbon or other marker

    What to record

  • Record when the first male (yellow/green) flowers open (in three different places on the tree)
  • Make a note of when 50% of the male flowers are open.
  • Finally, record when the first leaves push out of their buds and unfold completely (in three places on the tree)

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