What is the latest information about maple trees?

There are 199 species of Acer in the world, and many of them are world-famous ornamental species, distributed in Asia, Europe, North America and the northern margin of Africa. China is also the country with the largest number of maple species in the world. at present, there are 151 species, which are distributed all over the country, mainly in the Yangtze River basin and its southern provinces, and is the modern distribution center of maples in the world.

Maple trees are mostly tall trees with a height of 24 meters and a crown width of 16 meters. The flowering period is from April to May and the fruiting period is from September to October. As the tree grows older, the crown gradually opens into a circle. The branches are reddish brown to brown, with small holes, and black-brown or gray in winter. Maple leaves are gorgeous in color, chic and beautiful in shape, can make bookmarks, specimens, etc., turn fiery red in autumn and crimson when they fall on the ground.

Maple leaves opposite, leaf axis 9-17 cm long, grayish brown, glabrous, leaflets 3, sparse for 5, papery, oblong-elliptic or long-ovate, 8-10 cm long, 3.5-4.5 cm wide, apex long acuminate, base broadly cuneate, margin slightly reflexed, serrate, dark green above, glabrous, abaxially light, sparsely white puberulent toward basal vein axils (both sides of midrib), remaining glabrous, main veins obvious on both sides Lateral veins 6-7, and reticulate veins obvious on both sides, lateral and petiole long by Yao Wang usurped half, middle and petiole 2.5-3.5 cm long.

Maple racemes axillary, flowers numerous, petiolules 9-15 mm long, stipules small, stipules linear, flowers 9-12 mm long, calyx 5, linear triangle, 7-9 mm long, base about 9 mm wide, both surfaces glabrous or outside base sparsely pilose, petals 5, inserted on edge of disk, spatulate, ca. 9 mm long, both surfaces glabrous, stamens 5, opposite petals, arising at inner base of petals Filaments ca. 7 mm, base glabrous, anthers ca. 2 mm, styles 3, long (connected to ovary) ca. 7 mm, base extremely sparsely white pilose, stigma shaped, ovary 1-loculed, ovules numerous.

There are many kinds and varieties of maple, and their habits are not the same. In garden application, reasonable cultivation should be adopted according to the suitable environment of various places. If the new leaves are red or yellow in spring, they should generally be planted in shady, moist and fertile places to avoid direct sunlight and shrinking leaves, while those with red leaves in autumn should have sufficient sunshine. Grow well in plenty of sunlight, suitable for full shade and wet to dry, well-drained soil. The pH value of soil is required to be less than 7.0 acidity. Clay and acid soils can be tolerated.