Summary ⁶

Fraxinus pennsylvanica, the green ash or red ash, is a species of ash native to eastern and central North America, from Nova Scotia west to southeastern Alberta and eastern Colorado, south to northern Florida, and southwest to Oklahoma and eastern Texas. It has spread and become naturalized in much of the western United States and also in Europe from Spain to Russia.

Fraxinus pennsylvanica is a medium-sized deciduous tree reaching 12–25 metres (39–82 feet) (rarely to 45 m or 148 ft) tall with a trunk up to 60 centimetres (24 inches) in diameter. The bark is smooth and gray on young trees, becoming thick and fissured with age. The winter buds are reddish-brown, with a velvety texture. The leaves are oppositely arranged, pinnately compound with seven to nine (occasionally five or eleven) leaflets, these with serrated margins and short but distinct, downy petiolules a few millimeters long. They are green both above and below. The autumn color is golden-yellow and depending on the climate, green ash's leaves may begin changing color the first week of September

Green ash is the most widely distributed of all the American ashes, although its range centers on the midwestern U.S. and Great Plains. Its natural habitat is almost exclusively stream sides and bottomlands. The large seed crops provide food to many kinds of wildlife.

Green ash is threatened by the emerald ash borer, a beetle introduced accidentally from Asia. Asian ashes have a high tannin content in their leaves which makes them unpalatable to the beetle, while most American species (with the notable exception of blue ash) do not.[

Fontes e Créditos

1. (c) Keith Kanoti, Maine Forest Service, USA, alguns direitos reservados (CC BY), http://commons.wikimedia.org/wiki/File:Fraxinus_pennsylvanica_leaf.jpg
2. (c) michaelgold, alguns direitos reservados (CC BY-NC), uploaded by michaelgold
3. (c) Nicholas A. Tonelli, alguns direitos reservados (CC BY), https://www.flickr.com/photos/nicholas_t/19052549854/
4. (c) Nate Martineau, alguns direitos reservados (CC BY-NC), uploaded by Nate Martineau
5. (c) Summit Metro Parks, alguns direitos reservados (CC BY-NC), uploaded by Summit Metro Parks
6. Adaptado por Tom Pollard de uma obra de (c) Wikipedia, alguns direitos reservados (CC BY-SA), https://en.wikipedia.org/wiki/Fraxinus_pennsylvanica

Mais informações

• BioDiversity4All taxon page
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