1	Leaves simple, undivided or 3-5-divided, but not deeply so to base		(2)
+	Leaves palmately or pinnately compound		(13)
2 (1)	Branchlets, petioles, and leaf blade glabrous or abaxially with tufts of hairs limited to vein axils		(3)
+	Branchlets, petioles, and leaf blade abaxially pubescent with soft hairs or villous		(7)
3 (2)	Leaves conspicuously 3-5-divided		(4)
+	Leaves undivided or slightly 3-5-cleft		(5)
4 (3)	Leaves with 3-5 broad lobes (lobed up to middle), notch obtuse or acute.		6 A. humulifolia
+	Leaves with 3-5 deep lobes, notch rounded.		7 A. acerifolia
5 (3)	Leaf margin irregularly toothed, usually with large, elliptic, triangular, or narrowly triangular teeth (to 1 cm).		3 A. acutidentata
+	Leaf margin with shallow, broadly triangular teeth		(6)
6 (5)	Leaf abaxially pale green, upper two lobes short or inconspicuous.		1 A. bodinieri
+	Leaf abaxially green, upper two lobes triangular, conspicuous, and slightly extending outward.		2 A. glandulosa
7 (2)	Leaves 3-5-divided, lobed conspicuously to middle, rarely only slightly lobed or undivided		(8)
+	Leaves undivided or slightly 3-5-cleft		(10)
8 (7)	Pedicels usually 1-1.5 mm, rarely to 2 mm.		2 A. glandulosa
+	Pedicels 2-3 mm		(9)
9 (8)	Leaves elliptic-ovate, usually 5-divided, abaxially with dense grayish hairs.		1 A. bodinieri
+	Leaves elliptical-pentangular or cordate-pentangular, usually 3-divided with lobes to middle, abaxially with short hairs.		6 A. humulifolia
10 (7)	Leaves pentangular-ovate or cordate, 3-5-lobed, margin with large, sharp teeth.		2 A. glandulosa
+	Leaves ovate or cordate, margin with rounded teeth		(11)
11 (10)	Blades undivided, base conspicuously cordate, margin with regular teeth, both surfaces pubescent.		2 A. glandulosa
+	Blades slightly 3-5-divided, margin with irregular teeth		(12)
12 (11)	Upper part of leaves irregularly divided, leaves with dense grayish appressed hairs.		4 A. mollifolia
+	Upper part of leaves conspicuously 3-lobed, leaves densely scabrous.		5 A. tomentosa
13 (1)	Leaves 3-7-palmate		(14)
+	Leaves pinnate to bipinnate		(17)
14 (13)	Branchlets, petioles, or leaf blade abaxially sparsely pubescent; leaves 3- or 5-foliolate		(15)
+	Branchlets, petioles, and leaf blade abaxially glabrous; leaves 3-5-foliolate		(16)
15 (14)	Leaves 3-foliolate, leaflets undivided, or only base of lateral leaflets divided.		8 A. delavayana
+	Leaves 5-foliolate, leaflets pinnatifidly divided, or margin with coarse teeth.		9 A. aconitifolia
16 (14)	Leaflets pinnatipartite, lower half attenuate into wings.		10 A. japonica
+	Leaflets toothed or lobed at margin, not pinnatipartite.		8 A. delavayana
17 (13)	Branchlets, petioles, and inflorescences glabrous		(18)
+	Branchlets, petioles, and inflorescence rachises pubescent		(21)
18 (17)	Leaves green on both surfaces, leaflet margin with large, conspicuous teeth		(19)
+	Leaves abaxially strongly glaucous, leaflet margin entire or with fine teeth		(20)
19 (18)	Tendril trifurcate; leaflets 4-12 × 2-6 cm.		11 A. megalophylla
+	Tendril bifurcate; leaflets 2-5 × 1-2.5 cm.		17 A. grossedentata
20 (18)	Leaflets 2 or 3 pairs, blades 7-15 × 3-7 cm.		14 A. chaffanjonii
+	Leaflets usually 4-6 pairs, blades 2.5-6 × 1-3.5 cm.		16 A. hypoglauca
21 (17)	Branchlets, petioles, and inflorescence rachises pubescent with short gray hairs; branchlets terete		(22)
+	Branchlets, petioles, rachises, pedicels, and leaflets abaxially ferruginous pilose; branchlets conspicuously 4-6-ridged		(23)
22 (21)	Dried leaflets light green, margin coarsely toothed, central leaflet ovate-elliptic.		11 A. megalophylla
+	Dried leaflets abaxially yellowish brown, margin ± undulate, central leaflet obovate or ovate.		13 A. cantoniensis
23 (21)	Leaflets 3.5-14 × 2-6.5 cm, margin 5-15-toothed, abaxially densely ferruginous pilose; berries 8-15 mm in diam.		12 A. rubifolia
+	Leaflets 3-6 × 0.5-3 cm, margin entire or with 1 to several inconspicuous teeth, midvein abaxially sparsely pilose; berries 5-7 mm in diam.		15 A. gongshanensis