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Male flowers Seeds of Fraxinus excelsior, popularly known as "keys" or "helicopter seeds", are a type of fruit known as a samara. It is a large deciduous tree growing to 12–18 m (39–59 ft) (exceptionally to 43 m or 141 ft) tall with a trunk up to 2 m (6.6 ft) (exceptionally to 3.5 m or 11 ft) diameter, with a tall, narrow crown. [2]
Fraxinus excelsior 'Hessei', also known as one-leaved ash [1] or simple-leaved ash, [2] is a cultivar of the Fraxinus excelsior species native to Europe and Western Asia. It is known for being vigorous, seedless, and pest resistant. [2] It is widely cultivated as a shade tree, having lustrous, dark-green foliage. [2]
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.
Articles relating to Fraxinus excelsior (European ash) and its cultural importance. It is a flowering plant species in the olive family Oleaceae.It is native throughout mainland Europe east to the Caucasus and Alborz mountains, and Great Britain and Ireland, the latter determining its western boundary.
Fraxinus americana, the white ash or American ash, is a fast-growing species of ash tree native to eastern and central North America. White ash trees are threatened by the invasive emerald ash borer .
Minneapolis and Hennepin County residents should soon have access to $18 million in federal funding to help low-income homeowners remove and replace trees infested with the emerald ash borer. The ...
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.
So far the fungus has mainly affected the European ash (Fraxinus excelsior) and its cultivars, but it is also known to attack the narrow-leafed ash (Fraxinus angustifolia). [28] The manna ash (Fraxinus ornus) is also a known host, although it is less susceptible than the other European ash species. [28]