Search results
Results from the WOW.Com Content Network
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.
The emerald ash borer (Agrilus planipennis), also commonly known by the acronym EAB, is a green beetle native to Asia; its larvae kill ash trees. [1] In North America, the EAB is an invasive species, highly destructive to ash trees in its introduced range. The damage of this insect rivals that of chestnut blight and Dutch elm disease. [17]
Fraxinus excelsior, known as the ash, or European ash or common ash to distinguish it from other types of ash, is a flowering plant species in the olive family Oleaceae.It is native throughout mainland Europe [2] east to the Caucasus and Alborz mountains, and west to Great Britain and Ireland, the latter determining its western boundary.
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.
Fraxinus pennsylvanica, the green ash or red ash, [3] 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.
Image of black ash trunk. Tree is located in a seasonally wet, riparian habitat near a small-scale stream. 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).
Oregon ash sprouts vigorously from cut stumps or fire-killed trees. 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.
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.