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The fruit is a pair of samaras (winged seeds). The seeds are globose, 7–10 mm (9 ⁄ 32 – 13 ⁄ 32 in) in diameter, the wing 2–3 cm (3 ⁄ 4 – 1 + 1 ⁄ 4 in) long. The seeds fall from the tree in autumn, where they must be exposed to 45 days of temperatures below 4 °C (39 °F) to break their coating down.
Maples flower in late winter or early spring, in most species with or just after the appearance of the leaves, but in some before the trees leaf out. [8] Maple flowers are green, yellow, orange or red. Though individually small, the effect of an entire tree in flower can be striking in several species.
Soil acidity can influence the color of the foliage and trees with female flowers are more likely to produce orange coloration while male trees produce red. The fall colors of red maple are most spectacular in the northern part of its range where climates are cooler. A. rubrum leaf in the autumn, top, compared to striped maple, which turns ...
The seeds of both trees have no epigeal dormancy and will germinate immediately. Seed production begins at 11 years of age and large crops are produced most years. Like most maples, silver maple can be variably dioecious (separate male or female trees) or monoecious (male and female flowers on the same tree) but dioecious trees are far more common.
Norway maple seeds are flattened, while those of sugar maple are globose. [citation needed] The sugar maple usually has a brighter orange autumn color, where the Norway maple is usually yellow, although some of the red-leaved cultivars appear more orange. The flowers emerge in spring before the leaves and last 2-3 weeks.
Acer opalus is a medium-sized deciduous tree growing to 20 metres (66 ft) tall, with a trunk up to 1 m diameter. The leaves are glossy green, 7–13 centimetres (2.8–5.1 in) long and 5–16 centimetres (2.0–6.3 in) across, palmately lobed with blunt teeth.
The fruit is a paired samara (two winged seeds joined at the base), green to reddish-pink in color, maturing brown in early fall; each seed is globose, 7–10 mm (1 ⁄ 4 – 3 ⁄ 8 in) diameter, with a single wing 2–3 cm (3 ⁄ 4 – 1 + 1 ⁄ 4 in) long.
Acer floridanum (syn. Acer saccharum subsp. floridanum (Chapm.) Desmarais, Acer barbatum auct. non Michx.), commonly known as the Florida maple and occasionally as the southern sugar maple or hammock maple, is a tree that occurs in mesic and usually calcareous woodlands of the Atlantic and Gulf coastal plain in the United States, from southeastern Virginia in the north, south to central ...