1	Stamens not less than 10; leaf blade broadly ovate to cordate or orbicular, membranous to subleathery		(2)
+	Stamens not more than 10; leaf blade ovate or orbicular, rarely linear-lanceolate, papery, rarely leathery		(4)
2 (1)	Leaf blade broadly ovate to ovate, sometimes obovate.		8 A. premnifolium
+	Leaf blade oblong, cordate, or orbicular		(3)
3 (2)	Leaf blade oblong.		10 A. salviifolium
+	Leaf blade cordate or orbicular.		7 A. platanifolium var. trilobum
4 (1)	Flowers small, petals usually shorter than 1 cm		(5)
+	Flowers large, petals ca. 1 cm or longer		(7)
5 (4)	Leaf blade suborbicular; styles pubescent.		11 A. yunnanense
+	Leaf blade oblong or broadly elliptic; styles glabrous		(6)
6 (5)	Leaf blade oblong or lanceolate, pubescent when young, glabrescent; anthers basally pubescent.		4 A. faberi
+	Leaf blade broadly elliptic or ovate-oblong, both surfaces pubescent; anthers inside with soft hairs		2 A. barbatum
7 (4)	Connectives of stamens glabrous		(8)
+	Connectives of stamens pubescent		(9)
8 (7)	Inflorescences 7-30(-50)-flowered, petals lanceolate, 1-1.5 cm; leaf blade suborbicular, elliptic, or ovate, petiole 4-6 cm; drupe ovoid, 5-7 mm.		3 A. chinense
+	Inflorescences 1-5-flowered, petals linear, 1.8-2.3 cm; leaf blade ovate or suborbicular, petiole 1-4 cm; drupe ellipsoid, 1.3-2 cm.		1 A. alpinum
9 (7)	Climbing shrub; petals 5; inflorescences 5-12-flowered; leaf blade oblong.		6 A. kwangsiense
+	Erect small tree or shrub; petals 6-10; inflorescences 2-7-flowered; leaf blade ovate to broadly ovate or suborbicular		(10)
10 (9)	Leaf blade suborbicular or broadly ovate, 12-14 × 7-9 cm, petiole 2.5-4 cm; inflorescences 5-7-flowered, petals 6-8(-10), 2-2.5 cm.		5 A. kurzii
+	Leaf blade narrowly to broadly ovate, 4-7 × 2.7-4 cm, petiole 1-1.6 cm; inflorescences 2- or 3-flowered, petals 7, ca. 1 cm.		9 A. qingchuanense