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Fraxinus angustifolia subsp. angustifolia has become a weed in many parts of Australia, where it is known as Desert Ash. It has been widely planted as a street and park tree, and has spread to native bushland and grasslands, as well as stream banks and drainage lines, out-competing native plants for moisture, light and nutrients. [7] [8]
Fraxinus americana, the white ash or American ash, is a fast-growing species of ash tree native to eastern and central North America. The species is native to mesophytic hardwood forests from Nova Scotia west to Minnesota , south to northern Florida , and southwest to eastern Texas .
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.
European ash in flower Narrow-leafed ash (Fraxinus angustifolia) shoot with leaves. Fraxinus (/ ˈ f r æ k s ɪ n ə s /), commonly called ash, is a genus of plants in the olive and lilac family, Oleaceae, [4] and comprises 45–65 species of usually medium-to-large trees, most of which are deciduous trees, although some subtropical species are evergreen trees.
Fraxinus velutina is a small deciduous tree growing to 10 m tall, with a trunk up to 30 cm diameter. The bark is rough gray-brown and fissured, and the shoots are velvety-downy. The leaves are 10–25 cm long, pinnately compound with five or seven (occasionally three) leaflets 4 cm or more long, with an entire or finely serrated margin.
Tree bark is corky and spongy. Black ash is a medium-sized deciduous tree reaching 15–20 metres (49–66 ft) (exceptionally 26 metres (85 ft)) tall with a trunk up to 60 cm (24 inches) diameter, or exceptionally to 160 cm (63 inches). The bark is grey, thick and corky even on young trees, becoming scaly and fissured with age. The winter buds ...
Young trees typically grow vigorously for their first 60 years, with their growth slowing considerably in the following years. [4] This particular species of ash is well adapted to soggy ground due to its moderately shallow, but extensive and wide-spreading root system. This also allows for the tree to withstand wind storms exceptionally well.
The rough bark is thin and flaky on younger trees but, with age, it becomes thick, dark grey to black, and furrowed. Young trees have egg-shaped to lance-shaped or curved, bluish green to glaucous leaves that are 60–170 mm (2.4–6.7 in) long and 16–75 mm (0.63–2.95 in) wide.