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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 .
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 genus is widespread throughout much of Europe, Asia, and ...
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).
Ash – Fraxinus spp. Black ash – Acer negundo, Fraxinus nigra; Blue ash – Fraxinus quadrangulata; Cane ash – Fraxinus americana; European ash – Fraxinus excelsior [1] Green ash – Fraxinus pennsylvanica lanceolata; Maple ash – Acer negundo; Red ash – Fraxinus pennsylvanica lanceolata; River ash – Fraxinus pennsylvanica
Fraxinus latifolia is a medium-sized deciduous tree that can grow to heights of 20–25 metres (65–80 feet) in height, with a trunk diameter of 40–75 centimetres (16–30 inches) in its 100−150-year average life span. [4]
It is brown when fully formed, finally black, but green at first. Once the leaves have fallen, the galls, filled with mites, are obvious and may remain for a year or more. Leaflets or entire leaves and petioles may also be involved, with additional distortions such as thickening and leaf lamina rolling, especially when the tree is heavily infested.
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.
Fraxinus uhdei is locally known as fresno blanco in Spanish; other English vernacular names include Hawaiian ash and Mexican ash. [3] The name Shamel ash refers to Archie Shamel, who introduced the trees to California in the 1920s. [7] It is known as urapan in Colombia, where it was introduced in the 1950s. [8]