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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).
Male flowers have stamens about 3 mm (0.12 in) long with a sterile carpel about 0.3 mm (0.012 in) long. Female flowers lack stamens and usually have a single carpel about 1.5 mm (0.059 in) long. Flowering occurs in summer and the fruit is a spherical red or brown to black follicle 6–7 mm (0.24–0.28 in) wide. [4] [5]
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; Swamp ash – Fraxinus ...
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 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]
Eucalyptus sieberi, commonly known as the silvertop ash or black ash, [2] is a species of medium-sized to tall tree that is endemic to south-eastern Australia. It has rough bark on the trunk and the base of larger branches, and smooth bark above.
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The fruit is a samara comprising a single seed 1–2 cm long with an elongated apical wing 2.5–4 cm long and 5–7 mm broad. [1] It is closely related to Fraxinus nigra (black ash) from eastern North America, and has been treated as a subspecies or variety of it by some authors, as F. nigra subsp. mandschurica (Rupr.)