- Scientific Name: Actinidia polygama (Siebold & Zucc.) Planch. ex Maxim.
- Ref: Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans. 9:64. 1859
- English Common Name: silver vine, cat powder
- Chinese Common Name: 葛枣猕猴桃 gězǎo míhóutáo, 葛枣 gězǎo, 木天寥 mùtiānliáo
- Japanese Common Name: マタタビ [木天蓼] matatabi
- Family: Actinidiaceae
- Genus: Actinidia
- Distribution: Mountain forests, also widely cultivated; 500-1900 m. Anhui, Chongqing, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jilin, Liaoning, Shaanxi, Shandong, Sichuan, Yunnan [Japan, Korea, Russia].
- Photo: 06/15/2013, Mt. Tianmu, Zhejiang
Climbing shrubs, large, deciduous. Branchlets glabrous, lenticels inconspicuous; pith white, large, solid. Petiole purplish red, 1.5-3.5 cm, glabrous; leaf blade abaxially pale green, adaxially green to entirely white, sometimes only upper half white or yellowish, ovate to oblong-ovate, 7-14 × 4.5-8 cm, membranous to thinly papery, abaxially glabrous or sparsely curly-tomentose to strigillose on midvein and lateral veins, adaxially sparsely strigillose, veins conspicuous abaxially, subconspicuous adaxially, lateral veins 6 or 7 pairs, arcuate-ascending, veinlets reticulate, abaxially subconspicuous with parallel cross-bars, inconspicuous adaxially, base broadly cuneate to rounded, margin serrulate, apex acuminate to abruptly acuminate. Inflorescences 1-flowered, or 2- or 3-flowered in a fascicle; pedicels 6-8 mm, slightly puberulent. Flowers white. Sepals (4 or)5, ovate to oblong-ovate, 5-7 mm, both surfaces glabrous or sparsely puberulent. Petals 5, obovate to oblong-obovate, 0.8-1.3 cm. Filaments 5-6 mm; anthers yellow, ovoid, 1-1.5 mm, sagittate at base. Ovary bottle-shaped, 4-6 mm, glabrous; styles 3-4 mm. Fruit orange when mature, ovoid to cylindric-ovoid to oblong-ovoid, 2.5-3 cm, glabrous, lenticels absent, rostrate at apex. Seeds 1.5-2 mm. Fl. Jun-Jul, fr. Sep-Oct. 2n = 58, 116. (Flora of China)
