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Female flowers give way to distinctive clusters of winged seeds that somewhat resemble the hops-like seeds of ironwood. [ 6 ] The fruit is a small nut about 3–6 millimetres ( 1 ⁄ 8 – 1 ⁄ 4 in) long, held in a leafy bract ; the bract may be either trilobed or simple oval, and is slightly asymmetrical.
The fruit has a thick, four-ribbed husk 3 to 4 mm (0.12 to 0.16 in) thick that usually splits from the middle to the base. The nut is distinctly four-angled with a reddish-brown, very hard shell 5 to 6 mm (0.20 to 0.24 in) thick containing a small edible kernel.
The fruit is a small 7–8-millimeter (9 ⁄ 32 – 5 ⁄ 16-inch) long nut, partially surrounded by a three- to seven-pointed leafy involucre 2–3 centimeters (3 ⁄ 4 – 1 + 1 ⁄ 4 in) long; it matures in autumn. The seeds often do not germinate till the spring of the second year after maturating. Bark: On old trees near the base, furrowed.
The plant has separate male and female flowers that can occur on the same tree. Both male and female flowers are small and inconspicuous. The fruit is small (about 6 mm wide) and woody, and contains three small nuts, two of which have three small wings and one with two wings. In most years seed production is poor, but once in a while a 'mast ...
The fruit is a small 7–8 mm (0.28–0.31 in) long nut, partially surrounded by a three-pointed leafy involucre 3–4 cm (1.2–1.6 in) long; it matures in autumn. [ citation needed ] Distribution
The tree produces spiky green fruits about the size of a golf ball, which turn brown and drop off the tree over an extended period beginning in fall and continuing over the winter.
Native ash species, including white ash (pictured), have been declining rapidly this century due to predation by the emerald ash borer. [1]Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees.
The fruit is a dry egg-shaped capsule 3–4 centimetres (1 + 1 ⁄ 8 – 1 + 5 ⁄ 8 in) long, containing numerous tiny seeds. The seeds are winged and disperse by wind and water. Pollarded trees do not produce flowers, as these form only on mature wood. Paulownia tomentosa requires full sun for proper growth.
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