1	Leaves triplinerved		(2)
+	Leaves pinninerved		(3)
2 (1)	Fruit oblate, 12-18 × 15-25 mm, inconspicuously angled; leaf blade large, narrowly elliptic to elliptic-ovate, 10-15 × 5-8.5 cm; branchlets, petioles, and leaf blade abaxially usually ± rusty tomentose.		1 C. densiflora
+	Fruit globose or oblate, 7.5-9 × 9-12 mm, 12-15-angulate; leaf blade narrowly elliptic, 7-11 × (2-)3.5-5.5 cm; branchlets, petioles, and leaf blade abaxially usually glabrate.		2 C. chinensis
3 (1)	Leaf venation conspicuously elevated, densely reticulate on both surfaces		(4)
+	Leaf venation not densely reticulate on both surfaces		(6)
4 (3)	Young branchlets pubescent; leaf blade oblong-elliptic or oblong-lanceolate, 4.5-10.2 × 2-4.5 cm, lateral veins 7-9 pairs.		3 C. yaanica
+	Young branchlets glabrous; leaf blade ovate or ovate-elliptic, rarely elliptic, 7-13 × 2.5-6 cm, lateral veins 3-6 pairs		(5)
5 (4)	Leaf blade ovate-elliptic, 9-11 × 4.5-6 cm, lateral veins 5 or 6 pairs.		4 C. elliptifolia
+	Leaf blade ovate, rarely elliptic, 7-13 × 2.5-5.5 cm, lateral veins 3-5 pairs.		5 C. lyoniifolia
6 (3)	Fruit corky-spotted.		6 C. maculata
+	Fruit not corky-spotted		(7)
7 (6)	Fruit very smooth, not angled		(8)
+	Fruit not smooth, conspicuously or inconspicuously angled		(9)
8 (7)	Fruit ovoid, 1.5-1.8 cm; panicle short, much shorter than leaf blade, few branched; leaf blade oblong or oblong-elliptic, 8-26 × 2.5-7.5 cm, purple-green and whitish abaxially.		7 C. brachythyrsa
+	Fruit ellipsoid or narrowly ellipsoid, 2-2.5 cm; panicle large and several branched; leaf blade elliptic or oblong, 7.5-18 × 5-6.5 cm, gray-brown and opaque abaxially.		8 C. amygdalina
9 (7)	Fruit globose, subglobose, or oblate		(10)
+	Fruit narrowly ellipsoid, ellipsoid, or ovoid		(13)
10 (9)	Fruit oblate, large, ca. 2.1 × 2.3 cm.		9 C. depauperata
+	Fruit smaller, less than 1.5 cm		(11)
11 (10)	Leaf blade (6.5-)10.5-19 × (3.5-)4.2-8.5 cm, abaxially sparsely yellowish brown pubescent, densely so along midrib and lateral veins, yellow-green, not whitish.		10 C. calcicola
+	Leaf blade smaller, 5-12 × 2-4.5 cm, abaxially glabrous except hairy along midrib and lateral veins, always whitish		(12)
12 (11)	Panicle 5-10 cm.		11 C. maclurei
+	Panicle short, 2-3 cm.		12 C. kwangtungensis
13 (9)	Fruit more than 2.5 cm		(14)
+	Fruit smaller, less than 2.5 cm		(15)
14 (13)	Fruit ovoid, rugose and warty, inconspicuously angled; leaf blade lanceolate to oblong-lanceolate, 9-13 × 2.5-4.5 cm; branchlets and leaves glabrate; panicle spikelike, 3-8 cm, few flowered.		13 C. hainanensis
+	Fruit ellipsoid, not rugose and warty, ± conspicuously angled; leaf blade narrowly elliptic, large, (9-)15-28 × (2.5-)5.5-14 cm; branchlets and leaves ± densely rusty pubescent; panicles towerlike, axillary ones (5-)7.5-15 cm, terminal ones up to 19 cm, many flowered.		14 C. acutifolia
15 (13)	Leaf blade transverse veins conspicuously elevated abaxially.		20 C. impressinervia
+	Leaf blade transverse veins not elevated abaxially		(16)
16 (15)	Panicles variable, sometimes few flowered, much shorter than leaf, 2-4 cm, sometimes many flowered, as long as 1/2 of blade or more, 5.5-12 cm.		21 C. yunnanensis
+	Panicle not variable, ± uniform, less than 10 cm		(17)
17 (16)	Leaf blade thickly leathery, very shiny adaxially.		17 C. tsangii
+	Leaf blade leathery, subleathery, or papery, opaque or slightly shiny adaxially		(18)
18 (17)	Panicles ca. 10 cm; leaf blade glabrous on both surfaces.		16 C. metcalfiana
+	Panicles shorter, less than 8 cm; leaf blade sparsely pubescent abaxially or on both surfaces		(19)
19 (18)	Fruit narrowly ellipsoid, 1.5-2 cm; leaf blade usually smaller.		15 C. concinna
+	Fruit ellipsoid, 1.2-1 cm; leaf blade usually larger		(20)
20 (19)	Fruit ca. 1.7 × 1 cm; leaf blade leathery, oblong or elliptic-orbicular, very rarely obovate.		18 C. chingii
+	Fruit ca. 1.2 × 0.7 cm; leaf blade subleathery, lanceolate, lanceolate-elliptic, or elliptic, very rarely obovate.		19 C. leiana