Korea Flora: Trees up to 3-4m, barks gray and smooth, winter buds terminal, ellipsoid with 2 scales, terminal bud larger than lateral, 4-6 mm long, branchlet reddish to gray, leaf scars V or U shate, Leaves opposite, ovate, 3-5 lobed, abaxially brown pubescent along the vein, 5-9cm × 5-10cm, margin serrate, middle lobes serrate apically, petioile reddish, 2-5 cm long, Inflorescence terminal, racemose, 6-8 cm long, 6-8(-10)-flowered, glabrous, andromonoecious, Sepals 5, Petals 5, almost equal to sepals. Disk glabrous, flat, intrastaminal. Ovary reddish, purple when young. Nutlets flat, smooth, wing including nutlet 20-25 × 5mm,wings lanceolate.
Flowering mid May to early June
Fruting late Sept to mid Oct.
Distribution; Northeastern and northern China, far Eastern Russia; far North, North (Baekdudae-gan)

Taxonomic notes: This taxon was treated as a variety of Acer tschonoskii Maxim. (i.e., var. rubripes Kom.) which is distributed in Japan. Compared to A. tschnonoskii in Japan, the number of flowers and the length of this taxon is smaller (6-8 vs 8-20) and shorter (3-6 vs 6-12mm). Also, the size of the seeds is larger (10-17 × 6-9 vs 9-18 × 6-12mm) than that of Acer tschonoskii . Therefore, taxonomic treatment of this taxon should be treated as an independent species and supported Pojarkova's (1949) and Fang's (1982) treatment.

Russia Flora: Shrubs up to 10 m height. (rarely up to 13-15m), 12-20 cm in diameter. Top. poch. with one pair of outer chesh., short-petiolate (black up to 1.5 mm long.), lanceolate-ellipsoidal, 5-6 mm long., shiny, glabrous. Leaves 5-7-lobed, 10 cm long., 4-10.5 cm wide, heart-shaped to rounded in outline, heart - shaped base, thin, glabrous above or with single hairs along the veins, below along the veins b. m. densely brown-haired; lobe drawn -pointed, doubly finely serrate, center lobes noticeably longer and wider side. Cher. 4-9 cm long, are equal to l. reservoir or slightly shorter, thin, red, sparsely hairy to glabrous. Inflorescence few-flowered simple raceme, 4-6 cm long., naked or slightly pubescent. petals 7-8.5 mm in dia., yellow, naked; sepals about 3.5 mm long, slightly longer than cups, lanceolate-spatulate, obtuse bowl. such the same form; flowers 8, 2 times shorter than cups. fruits about 2.5 cm long., diverge at an obtuse angle their wings taper towards the ends.

Ussur. (yu. ). - In the second tier of black-fir-broad-leaved forests, more often on the northern slopes. Color. V. Very decorative. Honey plant. Included in the lists of rare and endangered plants. USSR and SDV.

Distribution : Jap.-Kit. (North -East. China, peninsulas of Korea, Japan - islands of Honshu, Shikoku and Kyushu). Described from Primor.: “Regione austro-ussuriensi, Kedrovaja Padj, leg. Bassargin" (type - LE).

China Flora: Small deciduous tree, about 5 meters high; bark is smooth, gray. Branches are glabrous. Leaves are papery, triangular-ovate or oblong, 6-10 cm long, 6-8 cm wide, often 5-lobed, rarely 3-lobed, lobes with short tails at the tip, heart-shaped or nearly heart-shaped at the base, densely serrated with sharp points, and reddish-brown pubescent veins on the underside when young; petioles are 4-5 cm long, purple or reddish-purple. Racemes, terminal, unisexual flowers, dioecious. Flowers are yellow-green; sepals are ovate-oblong; petals are oblong-obovate; stamens are nearly the same length as sepals, ovary is purple-red, glabrous, style is short, stigma is recurved. Winged fruits are yellow-brown when ripe, 2-2.5 cm long, with two wings at an obtuse angle; fruit stalk is 7 mm long. Flowering period is May, fruiting period is September.
It is produced in Heilongjiang, Jilin and Liaoning, and grows in sparse forests at an altitude of 800-1200 meters.

It is also distributed in Russia and North Korea.

[translated from Higher Plants of China]