1	Inflorescence a compact compound corymb, more than 20-flowered; petals white, spreading; leaves large, more than 2.5 cm.		(2)
+	Inflorescence a lax corymb; less than 20-flowered, sometimes reduced to a solitary flower; petals pink and erect, or white and spreading; leaves often smaller.		(10)
2 (1)	Leaf blade abaxially initially pilose, glabrate.		(3)
+	Leaf blade abaxially persistently densely tomentose.		(4)
3 (2)	Leaf blade elliptic to ovate, apex obtuse or acute; fruit reddish yellow, ovoid to obovoid, 6–7 mm in diam.		8 C. glaucophyllus
+	Leaf blade oblong-lanceolate to oblong-oblanceolate, apex acuminate or acute; fruit red, globose, 4–5 mm in diam.		9 C. glabratus
4 (2)	Deciduous shrub to small tree.		(5)
+	Evergreen or semievergreen shrub.		(6)
5 (4)	Leaf blade narrowly elliptic to ovate-lanceolate; fruit bright red, ellipsoid, 4–5 mm in diam.		6 C. frigidus
+	Leaf blade ovate or elliptic-ovate; fruit purplish brown to black, ovoid, 6–8 mm in diam.		7 C. affinis
6 (4)	Leaf blade abaxially persistently densely tomentose, apex obtuse or acute.		(7)
+	Leaf blade abaxially initially tomentose, glabrescent, apex acute to acuminate.		(8)
7 (6)	Inflorescences densely yellow tomentose; fruit obovoid; leaf blade obovate to elliptic.		4 C. coriaceus
+	Inflorescences densely gray tomentose; fruit turbinate; leaf blade obovate-lanceolate to oblong- lanceolate.		5 C. turbinatus
8 (6)	Pedicel very short or nearly absent; inflorescences 2–3.5 cm; fruit ellipsoid; pyrenes always 2.		3 C. harrovianus
+	Pedicel 2–4 mm; inflorescences 3–5 cm; fruit subglobose or pyriform; pyrenes 2–4.		(9)
9 (8)	Leaf blade adaxially shallowly rugose, abaxially glaucous and tomentose; fruit subglobose.		1 C. salicifolius
+	Leaf blade adaxially deeply rugose, abaxially yellow tomentose; fruit pyriform.		2 C. rhytidophyllus
10 (1)	Corymb 3–15(–20)-flowered, sometimes reduced to a solitary flower; leaf blade longer than 2 cm, rarely slightly shorter.		(11)
+	Inflorescence a solitary flower, rarely 2 or 3(–7)-flowered (but 3–9(–11)-flowered in C. sherriffii); leaf blade often less than 2 cm, rarely slightly longer.		(38)
11 (10)	Petals white, spreading; fruit red.		(12)
+	Petals pink, very rarely white, erect; fruit red, rarely black (C. melanocarpus, C. tenuipes).		(18)
12 (11)	Leaf blade abaxially glabrous or slightly pilose.		(13)
+	Leaf blade abaxially tomentose, rarely tomentose-villous.		(14)
13 (12)	Pedicel and abaxial surfaces of leaf blade and hypanthium sparsely pilose.		15 C. submultiflorus
+	Pedicel and abaxial surfaces of leaf blade and hypanthium glabrous.		16 C. multiflorus
14 (12)	Hypanthium abaxially glabrous.		(15)
+	Hypanthium abaxially tomentose or villous.		(16)
15 (14)	Leaf blade oblong-elliptic, abaxially gray tomentose, sometimes adaxially initially pubescent; petals 3.5–4 mm; fruit purplish red, with slightly glaucous bloom, obovoid.		13 C. mongolicus
+	Leaf blade elliptic to broadly ovate, abaxially tomentose-villous, with glaucous bloom, always adaxially glabrous; petals 5–6 mm; fruit dark red, ovoid, rarely oblong.		14 C. hebephyllus
16 (14)	Semievergreen shrub; anthers purplish red; leaf blade leathery; fruit with 2 pyrenes.		10 C. pannosus
+	Deciduous shrub; anthers yellow; leaf blade herbaceous; fruit with 1 or 2 pyrenes.		(17)
17 (16)	Leaf blade apically obtuse, abaxially white tomentose; hypanthium abaxially tomentose; petals 2.5–3.5 mm; fruit ovoid to ellipsoid.		11 C. soongoricus
+	Leaf blade apically acute, rarely obtuse, abaxially gray tomentose; hypanthium abaxially villous; petals 4–5 mm; fruit subglobose.		12 C. silvestrii
18 (11)	Leaf blade abaxially tomentose; fruit red, rarely black.		(19)
+	Leaf blade abaxially glabrous or pilose.		(31)
19 (18)	Hypanthium abaxially glabrous or slightly puberulous.		(20)
+	Hypanthium abaxially densely tomentose or pilose.		(23)
20 (19)	Fruit black; inflorescences 3–15-flowered, rachis tomentose.		29 C. melanocarpus
+	Fruit red; inflorescences 2–7-flowered, rachis glabrous to pilose.		(21)
21 (20)	Hypanthium abaxially puberulous; flowers 2–4 in short fascicles, nearly 1/2 as long as leaves.		26 C. oliganthus
+	Hypanthium abaxially glabrous; flowers 2–7 in corymbs.		(22)
22 (21)	Inflorescence nearly 1/2 as long as leaves; rachis and pedicels glabrous, rarely puberulous; leaf blade broadly elliptic, broadly ovate, or suborbicular; fruit subglobose, rarely ovoid, glabrous.		27 C. integerrimus
+	Inflorescence nearly as long as leaves; rachis and pedicels pilose; leaf blade ovate to oblong- ovate; fruit obovoid, puberulous.		28 C. gracilis
23 (19)	Leaf blade apically obtuse, rarely acute.		(24)
+	Leaf blade apically acute to acuminate.		(26)
24 (23)	Fruit black, ovoid, with 1 or 2 pyrenes; inflorescence 2–4-flowered.		19 C. tenuipes
+	Fruit red, globose to ovoid or obovoid, with 2 or 3 pyrenes; inflorescence 3–15-flowered.		(25)
25 (24)	Leaf blade elliptic to ovate; inflorescence 3- to more than 10-flowered; fruit obovoid or ovoid- globose, with 2 pyrenes.		17 C. zabelii
+	Leaf blade broadly ovate to suborbicular; inflorescence 10–15-flowered; fruit oblong, with 3 pyrenes.		18 C. fangianus
26 (23)	Rachis, pedicels, and hypanthium abaxially glabrous; fruit purplish black, subglobose, with 5 pyrenes.		25 C. reticulatus
+	Rachis, pedicels, and hypanthium abaxially pubescent; fruit red or orangish red, obovoid, ovoid, or subglobose, with 2–5 pyrenes.		(27)
27 (26)	Rachis, pedicels, and hypanthium abaxially densely white tomentose; petals white; fruit obovoid, pyrenes 2.		20 C. wardii
+	Rachis, pedicels, and hypanthium abaxially pilose; petals usually pink, sometimes white or red; fruit subglobose to obovoid, pyrenes 3–5 or if pyrenes 2, then fruit ovoid.		(28)
28 (27)	Inflorescences 5–11-flowered; fruit orangish red, with 3–5 pyrenes.		24 C. franchetii
+	Inflorescences 3–7(–11)-flowered; fruit dark or bright red, with 2–5 pyrenes.		(29)
29 (28)	Fruit ovoid, dark red, with 2 or 3 pyrenes; petals red.		23 C. obscurus
+	Fruit subglobose or obovoid, bright red, with 3–5 pyrenes; petals white or pink.		(30)
30 (29)	Inflorescence 2-flowered; petals pink; leaf blade elliptic to ovate, abaxially densely tomentose; fruit subglobose or obovoid, with 3–5 pyrenes.		21 C. dielsianus
+	Inflorescence 3–11-flowered; petals white; leaf blade ovate-lanceolate to oblong-ovate, abaxially sparsely tomentose; fruit subglobose, with 5 pyrenes.		22 C. glomerulatus
31 (18)	Fruit red.		(32)
+	Fruit black.		(35)
32 (31)	Hypanthium abaxially glabrous when old; flowers 5–13 in corymbs; leaf blade adaxially conspicuously rugose, veins prominently raised abaxially; styles 4 or 5; fruit with 4 or 5 pyrenes.		33 C. bullatus
+	Hypanthium abaxially slightly puberulous; flowers 1–9; leaf blade adaxially not rugose, veins raised but not prominently; styles 2; fruit with 2 pyrenes.		(33)
33 (32)	Flowers (1 or)2 or 3(–5); leaf blade elliptic-ovate to ovate-lanceolate, adaxially pilose; fruit ellipsoid.		30 C. acuminatus
+	Flowers 3–9; leaf blade elliptic-lanceolate, adaxially glabrous or initially pilose, glabrescent; fruit subglobose or obovoid.		(34)
34 (33)	Leaf blade elliptic-lanceolate; fruit subglobose, glabrous.		31 C. nitidifolius
+	Leaf blade broadly elliptic or broadly ovate, sometimes obovate or suborbicular; fruit obovoid, pilose or subglabrous.		32 C. schantungensis
35 (31)	Hypanthium abaxially glabrous or subglabrous; inflorescences 5–10-flowered; fruit ovoid or subglobose.		37 C. ambiguus
+	Hypanthium abaxially pilose; inflorescences 2–25-flowered; fruit ellipsoid, obovoid, or subglobose.		(36)
36 (35)	Leaf blade apically acute; inflorescence 2–5-flowered; fruit ellipsoid or obovoid, with 2 or 3 pyrenes.		34 C. acutifolius
+	Leaf blade apically acuminate; inflorescence 3–25-flowered; fruit subglobose or obovoid, with 3–5 pyrenes.		(37)
37 (36)	Inflorescences 9–25-flowered; leaf blade adaxially rugose and conspicuously bullate; pyrenes 4 or 5, smooth.		35 C. moupinensis
+	Inflorescences 3–7-flowered; leaf blade adaxially not bullate, veins slightly impressed; pyrenes 3 or 4, furrowed and shallowly pitted on back.		36 C. foveolatus
38 (10)	Petals white, spreading; fruit red, with 2 or 3(–5) pyrenes; prostrate or low evergreen shrub.		(39)
+	Petals red, rarely pink, erect; fruit red, rarely purplish black, with (1 or)2 or 3(or 4) pyrenes; spreading or erect, deciduous or semievergreen shrub.		(46)
39 (38)	Abaxial surfaces of leaf blade and hypanthium tomentose.		38 C. buxifolius
+	Abaxial surfaces of leaf blade and hypanthium pilose.		(40)
40 (39)	Leaf blade ovate or oblong-ovate to elliptic, rarely obovate; fruit with 2–5 pyrenes.		(41)
+	Leaf blade suborbicular, ovate, obovate, or elliptic to oblanceolate; fruit with 1 or 2 pyrenes.		(42)
41 (40)	Leaf blade elliptic to oblong-elliptic, 1–2(–3) cm; fruit subglobose, with 4 or 5 pyrenes.		39 C. dammeri
+	Leaf blade ovate or oblong-ovate, rarely obovate, 0.9–1.5 cm; fruit ellipsoid-ovoid or ellipsoid, with 2 or 3 pyrenes.		40 C. morrisonensis
42 (40)	Leaf blade elliptic, oblong or obovate to oblong-obovate, rarely oblanceolate, base cuneate.		(43)
+	Leaf blade suborbicular or broadly ovate, base broadly cuneate to rounded.		(45)
43 (42)	Flowers solitary, rarely 2 or 3; shrub prostrate or suberect; leaf blade obovate to oblong-obovate, margin slightly revolute.		(44)
+	Flowers 3–9(–11); shrub erect; leaf blade oblong-obovate, rarely oblanceolate, margin not revolute.		43 C. sherriffii
44 (43)	Prostrate shrubs; leaf blade obovate to oblong-obovate, 4–10 mm; fruit scarlet-red, 5–7 mm in diam.		41 C. microphyllus
+	Suberect shrubs; branches spreading to 40 cm; leaf blade elliptic to oblanceolate, rarely oblong, 6–16(–20) mm; fruit bright scarlet, 8–10 mm in diam.		42 C. conspicuus
45 (42)	Leaf blade adaxially glabrous, abaxially pilose; flowers 1–3, petals white or tinged reddish, spreading; fruit red, obovoid, with 2 or 3 pyrenes.		44 C. rotundifolius
+	Leaf blade villous on both surfaces; flowers solitary, petals pink, erect; fruit dark red, ovoid- globose, with 2 pyrenes.		51 C. langei
46 (38)	Leaf blade abaxially densely tomentose; flowers usually solitary.		(47)
+	Leaf blade abaxially glabrous or pilose; flowers 1–3(or 4).		(48)
47 (46)	Petals red; hypanthium abaxially pilose; leaf blade suborbicular or broadly elliptic, apex obtuse, abaxially persistently yellow tomentose.		45 C. rubens
+	Petals pink; hypanthium abaxially glabrous; leaf blade ovate, rarely ovate-elliptic, apex acute or obtuse, abaxially tomentose, gradually glabrescent, subglabrous when old.		46 C. uniflorus
48 (46)	Hypanthium abaxially glabrous; erect shrub.		(49)
+	Hypanthium abaxially pubescent; prostrate or erect shrub.		(53)
49 (48)	Stems irregularly branched; fruit subglobose, sessile, erect.		(50)
+	Stems ± distichously branched; fruit obovoid or globose, shortly pedicellate, pendent.		(51)
50 (49)	Leaf apically apiculate, rarely emarginate, blade suborbicular or orbicular-ovate, rarely broadly obovate, glabrous on both surfaces or slightly puberulous only along veins abaxially; petals pinkish.		58 C. apiculatus
+	Leaf apically acute, sometimes obtuse, blade ovate or elliptic-ovate, pilose on both surfaces; petals red.		59 C. sanguineus
51 (49)	Branchlets conspicuously verruculose; leaf apically emarginate or partly mucronulate; flowers solitary.		57 C. verruculosus
+	Branchlets strigose, not verruculose; leaf apically acute or obtuse; flowers 1–3.		(52)
52 (51)	Flowers solitary; stamens 20; leaf blade broadly ovate or broadly obovate, apex acute, rarely obtuse.		55 C. nitidus
+	Flowers 2 or 3; stamens 10; leaf blade suborbicular or broadly ovate, apex obtuse or acute.		56 C. taylorii
53 (48)	Prostrate low shrub; flowers solitary or in pairs.		(54)
+	Erect shrub; flowers 2 or 3(or 4).		(56)
54 (53)	Stems horizontally spreading, regularly distichously branched.		49 C. horizontalis
+	Stems tufted on ground, irregularly branched.		(55)
55 (54)	Leaf blade thinly papery, margin undulate; fruit subglobose, 7–9 mm in diam., pyrenes 2 or 3.		47 C. adpressus
+	Leaf blade leathery, margin thick, not undulate; fruit ovoid, 5–6 mm in diam., pyrenes 2.		48 C. subadpressus
56 (53)	Fruit black.		(57)
+	Fruit red.		(58)
57 (56)	Leaf apically obtuse, rarely acute, blade ovate, rarely elliptic, adaxially glabrous, abaxially villous or subglabrous; fruit ellipsoid, pyrenes 1 or 2.		53 C. nitens
+	Leaf apically acute to acuminate, blade elliptic to ovate-elliptic, both surfaces appressed strigose-villous; fruit ovoid or subglobose, pyrenes 2 or 3.		54 C. harrysmithii
58 (56)	Branchlets verruculose; leaf blade appressed pilose on both surfaces; fruit with 3 pyrenes.		52 C. chengkangensis
+	Branchlets not verruculose; leaf blade strigose-villous or subglabrous, fruit with 2 pyrenes.		(59)
59 (58)	Leaf blade elliptic or broadly elliptic, rarely obovate, abaxially slightly puberulous, adaxially subglabrous, apex acute, rarely ± obtuse; fruit ellipsoid, shortly stalked.		50 C. divaricatus
+	Leaf blade broadly ovate to suborbicular, both surfaces strigose-villous, apex obtuse, rarely acute; fruit ovoid-globose, subsessile.		51 C. langei