The species differences of Acer are as follows:

Alangium chinense (Lour.) Harms subsp. strigosum Fang:

For comparison A stout small tree or shrub, with branchlets, inflorescences and petioles densely covered with light yellow coarse hairs; leaves are larger, nearly round, about 15-17 cm in length and width, undivided or 3-5 lobed, with thicker veins on the lower side. Remarkably, the petiole is short and only 1-1.2 cm long; the petals are only 0.8-1.2 cm long, the style is hairy, and the filaments are hairy on both sides. The flowering period is from June to July and the fruiting period is from August to September.

Alangium chinense (Lour.) Harms subsp. pauciflorum Fang:

It is a slender shrub or small tree; the leaves are small, oval, and the top is Sharp, often undivided, rarely 3(-5) slightly cleft, 6-9 cm long, 4-6 cm wide, flowers are sparse, only 3-6 flowers per inflorescence, 8 petals and stamens, white filaments Sparsely pubescent.

Alangium chinense (Lour.) Harms subsp. triangulate (Wanger.) Fang:

The leaf base is triangular or nearly round, often 3-5 The lobes are deeply lobed, lanceolate or nearly ovate, and the groove is deep in the middle of the leaf, making it easy to distinguish it from other subspecies.

Species distinction of Acer:

Acer is similar to A. platanifolium (Sieb.etZucc.) Harms. The difference is that the petiole of Acer is 2.5-3.5 cm long, and each inflorescence is There are 7-30 (-50) flowers, petals 1-1.5 cm long; melon petiole length 3.5-5 cm, each inflorescence has only a few flowers, petals more than 1.8 cm long.

Distribution range of octagonal maple:

Aniseed maple is produced in Henan, Shaanxi, Gansu, Jiangsu, Zhejiang, Anhui, Fujian, Taiwan, Jiangxi, Hubei, Hunan, Sichuan, Guizhou, and Yunnan , Guangdong, Guangxi and southern Tibet; born in mountains or sparse forests below 1800 meters above sea level. It is also distributed in countries in Southeast Asia and eastern Africa.

The morphological characteristics of the octagonal maple:

Deciduous trees or shrubs, 3-5 meters high, rarely up to 15 meters, chest height and diameter 20 cm; branchlets are slightly zigzag-shaped, young and The branches are purple-green, hairless or sparsely pubescent. The winter buds are cone-shaped and are born at the base of the petiole. The scales are small.

The leaves are papery, nearly round or oval, ovate, with short sharp or blunt tips at the top. The sides of the base are often asymmetrical, with one side expanding slightly downward and the other side sloping upward, wide and broad. Wedge-shaped, truncate, almost heart-shaped, 13-19 (-2-6) cm long, 9-15 (-22) cm wide, undivided or 3-7 (-9) cleft, lobes short or sharp. Blunt tip, the upper surface of the leaf is dark green and hairless, and the lower surface is light green. Except for the tufted hairs in the vein axils, the rest of the leaf is nearly hairless; 3-5 (-7) veins emerge from the base, palmate, and 3-5 lateral veins Yes; petioles are 2.5-3.5 cm long, purple-green or light yellow, puberulent when young, then hairless. Cymes axillary, 3-4 cm long, sparsely puberulent, with 7-30 (-50) flowers, pedicel 5-15 mm long; bracteoles linear or lanceolate, 3 mm long, often caducous ; The total pedicel is 1-1.5 cm long, often segmented; the corolla is cylindrical, 1-1.5 cm long, the calyx is 2-3 mm long, the top is divided into 5-8 toothed sepals, 0.5-1 mm long, 2.5 wide -3.5 mm; petals 6-8, linear, 1-1.5 cm long, 1 mm wide, glued at the base, the upper part recurved after blooming, with pubescence on the outside, white at first, then turning yellow; stamens and petals are of the same number. Subequal in length, filaments slightly flat, 2-3 mm long, pubescent, anthers 6-8 mm long, septum glabrous, sometimes with wrinkles on the outside; disc nearly spherical; ovary 2-loculed, style glabrous, sparse Pubescent, stigma capitate, often 2-4-lobed. The drupe is oval, about 5-7 mm long and 5-8 mm in diameter. It is green when young and black when mature. There are persistent calyx teeth and flower discs at the top and 1 seed. The flowering period is from May to July and September to October, and the fruiting period is from July to November.