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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]
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 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 .
Description. Fraxinus ornus is a medium-sized deciduous tree growing to 15–25 m (49–82 ft) tall with a trunk up to 1 m diameter. The bark is dark grey, remaining smooth even on old trees. The buds are pale pinkish-brown to grey-brown, with a dense covering of short grey hairs.
Hymenoscyphus fraxineus is an ascomycete fungus that causes ash dieback, a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. The fungus was first scientifically described in 2006 under the name Chalara fraxinea. Four years later it was discovered that Chalara fraxinea is the asexual ...
The Ash Archive is a project founded in 2019 [1] to restore ash trees to the landscape in England. English ash trees experienced massive dieback beginning in 2012 as a result of a fungal pathogen, Hymenoscyphus fraxineus. [2][3] The archive contains over 3,000 trees, all of which propagated from the shoots of trees that had demonstrated some ...
Fraxinus griffithii. Fraxinus griffithii, the Himalayan ash or evergreen ash is a species of flowering tree. It has been recorded in the Philippines, Indonesia, Vietnam, Myanmar, Taiwan, China, Bangladesh and India. This plant is commonly grown as an ornamental in Australia, where it is an invasive species. [2][3][4]
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]