- Scientific Name: Acer caudatum subsp. ukurunduense (Trautv. & C.A.Mey.) E.Murr.
- Ref: Arbor. Bull., Washington 17:51. 1966
- Synonym: Acer ukurunduense Trautv. & C.A.Mey.
- English Common Name: Ukurundu Maple, Arahaga Maple
- Chinese Common Name: 花楷枫 huākǎifēng, 花楷槭 huākǎiqì
- Japanese Common Name: オガラバナ [麻幹花] ogarabana
- Family: Sapindaceae
- Genus: Acer
- Distribution: Coniferous or mixed forests, thickets on stony slopes, riverbanks; 500-2500 m. Heilongjiang, Jilin, Liaoning [Japan, Korea, E Russia].
- Photo: 07/22/2010, Mt. Changbai, Jilin
Trees 8-10 m tall, andromonoecious. Bark light grayish brown, slightly fissured. Branchlets light grayish brown or purplish brown, glabrous; winter buds shortly conical, densely yellow pubescent, scales 2 or 3 pairs. Leaves deciduous; petiole 5-8 cm, slightly pubescent or glabrescent; leaf blade adaxially dark green, suborbicular, 10-12 × 7-9 cm, membranous or papery, abaxially densely yellowish tomentose, adaxially glabrescent, primary veins slightly prominent abaxially, secondary reticulate veins conspicuous abaxially, base truncate or subcordate, 5(or 7)-lobed; lobes broadly ovate, rarely triangular-ovate, margin coarsely serrate, with broad acute or ± obtuse teeth, apex acuminate. Inflorescence terminal, erect, racemose-paniculate, compact, from leafy branchlets; peduncles (8-)10-12 cm. Pedicel (5-)8 mm, pubescent. Sepals 5, lanceolate, ca. 2 mm, outside pubescent. Petals 5, narrowly oblanceolate, ca. 3 mm. Stamens 8, or 7-10, glabrous, inserted at middle of disk. Disk extrastaminal, glabrous, lobed. Ovary densely pubescent. Nutlets flat, ca. 6 mm in diam., puberulent; wing including nutlet 1.5-2 cm × ca. 6 mm, wings spreading erectly. Fl. May, fr. Sep. 2n = 26. (Flora of China)
