1	Deciduous or semievergreen trees or shrubs; leaf blade papery or membranous, never leathery; flowering in spring or summer, fruiting in summer and autumn		(2)
+	Evergreen trees or shrubs; leaf blade leathery or papery, rarely membranous; flowering in autumn or winter, fruiting in spring and summer (key mostly based on vegetative and floral characters as the fruit of many species are not recorded; E. davidii was described in the protologue as deciduous but has leathery, Buxus-like leaves and seems more likely to belong here)		(35)
2 (1)	Trees or large shrubs; fruit not juicy		(3)
+	Small shrubs; fruit juicy		(5)
3 (2)	Fruit subglobose or broadly ellipsoid, conspicuously 8-winged; leaf blade ovate or ovate-elliptic, abaxially densely hairy; floral disk inconspicuous.		46 E. mollis
+	Fruit ovoid or ellipsoid, not winged; leaf blade narrowly lanceolate or elliptic, glabrous or sometime stellate; floral disk tubular, conspicuous		(4)
4 (3)	Floral disk usually glabrous; fruit 12-26 mm, ellipsoid, pink; branches with spines few or absent.		44 E. angustifolia
+	Floral disk pubescent at top; fruit 8-10 mm, ovoid or subglobose, cream-yellow or orange-yellow; branches conspicuously spiny.		45 E. oxycarpa
5 (2)	Leaves abaxially pubescent or pilose, lateral veins often adaxially impressed		(6)
+	Leaves abaxially with appressed scales only, lateral veins adaxially not impressed above		(15)
6 (5)	Flowers with stellate hairs		(7)
+	Flowers with peltate scales only, without stellate hairs		(10)
7 (6)	Leaves abaxially with long-stalked stellate hairs; fruiting pedicel 8-25 mm		(8)
+	Leaves abaxially with ± sessile stellate hairs		(9)
8 (7)	Flowers in clusters of 5-7; calyx tube 6-6.5 mm, lobes ca. 3.5 mm, shorter than tube; fruiting pedicel 10-25 mm.		47 E. grijsii
+	Flowers in clusters of 1-3; calyx tube 4-4.5 mm, lobes ca. 5.5 mm, longer than tube; fruiting pedicel 8-10 mm.		50 E. jingdongensis
9 (7)	Semievergreen shrubs, some leaves persistent in winter; lateral veins 4 or 5 per side of midrib; fruiting pedicel 1-5 mm.		49 E. stellipila
+	Deciduous shrubs, leafless in winter; lateral veins 6-8 per side of midrib; fruiting pedicel 30-40 mm.		56 E. courtoisii
10 (6)	Young branches with stellate hairs, these often long-stipitate		(11)
+	Young branches with appressed scales only		(12)
11 (10)	Calyx tube ca. 9.5 mm; young branches with dense pale to dark brown stellate hairs; leaf blade 3.5-6 cm.		55 E. jiangxiensis
+	Calyx tube ca. 5 mm; young branches with rust-colored stellate hairs; leaf blade 6-9 cm.		48 E. calcarea
12 (10)	New leaves produced in both spring and autumn; calyx tube funnelform, 5-6 mm; young branches with yellowish white scales.		51 E. argyi
+	New leaves produced only in spring; calyx tube campanulate or cup-shaped, 3-5 mm; young branches with yellowish brown to dark brown or rust-colored scales		(13)
13 (12)	Pedicels 3-5 mm; calyx tube 3-3.5 mm.		52 E. micrantha
+	Pedicels ca. 1 mm; calyx tube 4-5 mm		(14)
14 (13)	Leaf blade leathery, lanceolate-elliptic, 7-8 × ca. 2.5 cm, lateral veins 7-10 pairs; style pubescent.		53 E. bambusetorum
+	Leaf blade papery, broadly elliptic, 5.5-7 × 2.6-3.8 cm, lateral veins 5-7 pairs; style glabrous.		54 E. guizhouensis
15 (5)	Material in flower		(16)
+	Material in fruit		(26)
16 (15)	Style stellate hairy		(17)
+	Style glabrous		(20)
17 (16)	Young branches with silvery scales; calyx tube 5-10 mm		(18)
+	Young branches with brown scales; calyx tube 4-6 mm		(19)
18 (17)	Calyx tube 5-7 mm.		57 E. umbellata
+	Calyx tube 8-10 mm.		58 E. magna
19 (17)	Pedicel ca. 3 mm; style sparsely stellate hairy, sometimes glabrous.		60 E. wushanensis
+	Pedicel 5-8 mm; style densely stellate hairy.		62 E. angustata
20 (16)	Calyx tube 3-4.5 mm		(21)
+	Calyx tube 5-10 mm		(22)
21 (20)	Petiole 3-5 mm; leaf blade 2-5 × 1-2.5 cm.		63 E. tarokoensis
+	Petiole 6-11 mm; leaf blade 5-12 × 4-6 cm.		66 E. triflora
22 (20)	Petiole 8-13 mm; leaf blade leathery		(23)
+	Petiole 3-8 mm; leaf blade papery or membranous		(24)
23 (22)	Anthers 2.2-2.5 mm; leaf apex obtuse to rounded.		64 E. formosensis
+	Anthers 1.4-1.5 mm; leaf apex acute.		65 E. grandifolia
24 (22)	Leaf blade adaxially with stellate hairs when young.		61 E. multiflora
+	Leaf blade adaxially with scales only		(25)
25 (24)	Flowers often 5-7 in axillary clusters or along very short shoots; pedicel very short to ± absent.		59 E. nanchuanensis
+	Flowers 1-3 in axils of new leaves; pedicel ca. 3 mm.		60 E. wushanensis
26 (15)	Fruit 5-10 mm		(27)
+	Fruit 12-20 mm		(28)
27 (26)	Fruit broadly ellipsoid to nearly globose, orange-pink, longer than its pedicel.		63 E. tarokoensis
+	Fruit subglobose, red, shorter than its pedicel.		57 E. umbellata
28 (26)	Fruiting pedicel erect, 3-15 mm		(29)
+	Fruiting pedicel curved downward, (10-)15-45 mm		(31)
29 (28)	Young branches, flowers, and fruit with silvery scales.		58 E. magna
+	Young branches, flowers, and fruit with ferruginous or brown scales		(30)
30 (29)	Branches thick, smooth; fruiting pedicel 3-9 mm.		59 E. nanchuanensis
+	Branches slender, rough; fruiting pedicel 8-16 mm.		60 E. wushanensis
31 (28)	Young stems with rust-colored or dark brown scales; petiole 3-8 mm; plants erect		(32)
+	Young stems with silvery brown scales; petiole 6-13 mm; plants scandent		(33)
32 (31)	Leaf blade elliptic or ovate to obovate-oblong, 2-5 cm wide.		61 E. multiflora
+	Leaf blade at first elliptic, later in season lanceolate or oblong-lanceolate, 1.2-2.2 cm wide		62 E. angustata
33 (31)	Leaf blade apex obtuse.		66 E. triflora
+	Leaf blade apex acute		(34)
34 (33)	Leaf blade broadly elliptic to elliptic, leathery; fruit 1.6-1.8 cm.		65 E. grandifolia
+	Leaf blade ovate, papery; fruit 1.8-2 cm.		64 E. formosensis
35 (1)	Calyx tube 4.5-7 mm wide; style always without hairs		(36)
+	Calyx tube 2-4 mm wide; style sometimes with stellate hairs		(42)
36 (35)	Calyx lobes 2-4 mm; filaments ca. 0.5 mm		(37)
+	Calyx lobes (4-)5-7 mm; filaments 1.5-3 mm		(38)
37 (36)	Erect shrub; leaf blade papery; style glabrous; calyx tube campanulate, lobes apically incurved, inside with scales and hairs.		3 E. luxiensis
+	Climbing shrub; leaf blade leathery; style with scales only; calyx tube funnelform, lobes erect, inside pubescent.		17 E. thunbergii
38 (36)	Erect shrub; stamen filaments 2-3 mm		(39)
+	Climbing shrub; stamen filaments 1.5-2 mm		(40)
39 (38)	Leaf blade elliptic or oblong, papery; flowers 1-5 on slender axillary shoot; calyx tube 8-9 mm; stigma only slightly curved.		1 E. macrantha
+	Leaf blade usually obovate, leathery or nearly so; flowers 4-6 in dense axillary cluster; calyx tube 6-7.5 mm; stigma tightly coiled.		2 E. obovatifolia
40 (38)	Stamen filaments ca. 2 mm, longer than anthers.		4 E. griffithii
+	Stamen filaments ca. 1.5 mm, shorter than or ca. as long as anthers		(41)
41 (40)	Pedicel 4-7 mm; calyx tube 8-9 mm.		5 E. pingnanensis
+	Pedicel 7-10 mm; calyx tube 10-11 mm.		6 E. loureiroi
42 (35)	Calyx tube 4-angled or cup-shaped, lobes usually ca. as long as or longer than tube, wrinkled at base		(43)
+	Calyx tube tubular, campanulate, or funnelform, not 4-angled or cup-shaped, lobes often shorter than tube, not wrinkled at base		(51)
43 (42)	Flowers sessile; inflorescence shorter than petioles; calyx lobes ca. 1/2 as long as tube.		14 E. conferta
+	Flowers pedicellate; inflorescence longer than petioles; calyx lobes ca. as long as or longer than tube		(44)
44 (43)	Calyx tube cupular-campanulate, faintly 4-angled; leaf blade papery or thinly leathery, veins adaxially inconspicuous		(45)
+	Calyx tube conspicuously 4-angled; leaf blade leathery, veins adaxially conspicuous		(48)
45 (44)	Calyx tube 2-2.5 mm; leaf blade obovate, ovate, or suborbicular		(46)
+	Calyx tube 3-4 mm; leaf blade elliptic, narrowly elliptic, or lanceolate		(47)
46 (45)	Leaf blade obovate, 3-6 cm.		13 E. oldhamii
+	Leaf blade ovate or suborbicular, 2-2.5 cm.		67 E. ovata
47 (45)	Young branchlets with dense ferruginous scales; leaf blade elliptic, petiole ca. 6 mm; flowers yellowish brown.		11 E. tonkinensis
+	Young branchlets with dense yellowish white or light brown scales; leaf blade narrowly elliptic to lanceolate, petiole 3-4 mm; flowers silvery white.		12 E. schlechtendalii
48 (44)	Petiole robust, 10-18 mm; spines present; filaments ca. 2.4 mm.		9 E. obtusa
+	Petiole 3-10 mm; spines apparently absent; filaments 0.6-1 mm		(49)
49 (48)	Pedicel 1-2 mm; leaf blade dark brown when dried.		10 E. formosana
+	Pedicel 3-6 mm; leaf blade green when dried		(50)
50 (49)	Leaf blade widest ca. 1/2 way along, 5-9 cm, lateral veins abaxially prominent; style straight.		7 E. gonyanthes
+	Leaf blade widest less than 1/2 way along, (1-)3-6 cm, lateral veins abaxially inconspicuous; style bent.		8 E. geniculata
51 (42)	Style glabrous		(52)
+	Style with stellate hairs		(59)
52 (51)	Leaves adaxially drying blackish; pedicel 0.5-1 mm, flower ± erect; calyx lobes ca. as long as tube.		43 E. yunnanensis
+	Leaves adaxially drying green or gray-green; pedicel (1-)2.5-12 mm; calyx lobes shorter than tube		(53)
53 (52)	Climbing shrub or vine		(54)
+	Erect shrub, rarely divaricate		(56)
54 (53)	Calyx tube funnelform, 5-6 mm, lobes 2-3 mm.		38 E. glabra
+	Calyx tube tubular, 8-9 mm, lobes 4-6 mm		(55)
55 (54)	Flowers brown, calyx lobes inside with only stellate hairs.		36 E. sarmentosa
+	Flowers white, calyx lobes inside with both stellate hairs and white scales.		37 E. cinnamomifolia
56 (53)	Lateral veins at 50°-60° to midrib, veins adaxially conspicuous		(57)
+	Lateral veins at 45°-50° to midrib, veins adaxially inconspicuous		(58)
57 (56)	Branchlets spinelike; leaf blade thickly leathery, lateral veins 7-9 pairs.		39 E. pungens
+	Branchlets not spiny; leaf blade papery or thinly leathery, lateral veins 5-7 pairs.		40 E. tutcheri
58 (56)	Flowers light white, calyx tube narrowly funnelform, 6-8 × 2-3 mm; leaf blade leathery, obovate-elliptic, abaxially silvery white.		41 E. henryi
+	Flowers dark brown, calyx tube broadly funnelform-campanulate, ca. 5 × 4 mm; leaf blade papery, elliptic to elliptic-lanceolate, abaxially grayish brown.		42 E. difficilis
59 (51)	Calyx tube campanulate or broadly tubular, 4-5 mm		(60)
+	Calyx tube tubular or tubular-funnelform, 5-11 mm, white or brown		(66)
60 (59)	Leaf blade broadly ovate or suborbicular, petiole 15-25 mm; calyx lobes ca. as long as tube; fruit with silvery scales.		15 E. macrophylla
+	Leaf blade elliptic or lanceolate, petiole shorter than 15 mm; calyx lobes shorter than tube; fruit with silvery or brownish scales (unknown for E. davidii)		(61)
61 (60)	Leaf blade 1.7-2.5 × 0.9-1.1 cm.		28 E. davidii
+	Leaf blade 2-8 × 1.3-4 cm		(62)
62 (61)	Pedicels 1-2 mm; plant climbing; leaf blade thinly papery or membranous, base cuneate to rounded; petiole 8-18 mm.		17 E. thunbergii
+	Pedicels 6-10 mm; plant erect, occasionally procumbent; leaf blade leathery or papery, base ± rounded; petiole 7-9 mm		(63)
63 (62)	Flowers brown; leaf blade abaxially uniformly brown.		20 E. luoxiangensis
+	Flowers white; leaf blade abaxially grayish white, sometimes speckled brown		(64)
64 (63)	Leaf blade apex acuminate; style S-shaped.		18 E. wenshanensis
+	Leaf blade apex rounded or obtuse; style straight or slightly curved		(65)
65 (64)	Young branchlets whitish or pale brown scaly; flowers in clusters of 1-5, calyx tube ca. 4 mm; plants with spines.		16 E. pallidiflora
+	Young branchlets rust-colored scaly; flowers in clusters of 5-7, calyx tube 5-6 mm; plants without spines.		19 E. taliensis
66 (59)	Calyx tube funnelform or tubular-funnelform		(67)
+	Calyx tube tubular		(71)
67 (66)	Young branchlets grayish yellow or light yellow; leaf blade oblong or oblong-elliptic, adaxially light green when dried.		21 E. lanpingensis
+	Young branchlets ferruginous or dark brown; leaf blade elliptic or oblanceolate-oblong, adaxially brown when dried		(68)
68 (67)	Leaf blade elliptic, adaxially with scales when young, lateral veins 5-7 pairs; flowers yellowish brown; calyx tube 6-7 mm		(69)
+	Leaf blade oblanceolate-elliptic, adaxially with stellate hairs when young, lateral veins 7-9 pairs; flowers ± white, calyx tube 4-5 mm		(70)
69 (68)	Pedicel 5-8 mm; calyx lobes ca. 2 mm; style curved at apex.		22 E. pilostyla
+	Pedicel 4-5 mm; calyx lobes ca. 3 mm; style straight.		23 E. xizangensis
70 (68)	Leaf blades uniformly oblanceolate-elliptic; petiole 6-8 mm; inside of calyx with scales only.		24 E. liuzhouensis
+	Leaf blades varying from orbicular to lanceolate, often along same branch; petiole 3-5 mm; inside of calyx both stellate-pilose and scaly.		25 E. heterophylla
71 (66)	Calyx tube 9-11 mm, lobes ca. 5 mm; leaf blade abaxially brown.		26 E. tubiflora
+	Calyx tube 5-8 mm, lobes 1.5-4 mm; leaf blade abaxially often ± white		(72)
72 (71)	Style coiled into a spiral.		29 E. retrostyla
+	Style erect or curved, but not spiral		(73)
73 (72)	Leaf blade narrowly lanceolate or narrowly elliptic; fruit 8-12 mm, scales dense, silvery		27 E. bockii
+	Leaf blade elliptic to broadly elliptic, or elliptic-lanceolate to lanceolate; fruit 12-16 mm, brown or rust-colored, rarely white (unknown for E. taliensis and E. xichouensis)		(74)
74 (73)	Flowers in clusters of 5-7; pedicel (4-)6-8(-10) mm; style densely hairy		(75)
+	Flowers solitary or in clusters of 2-5; pedicel 2-5 mm; style glabrous or sparsely hairy		(76)
75 (74)	Petiole 12-15 mm; leaf blade elliptic or oblong-lanceolate.		34 E. delavayi
+	Petiole 6-8 mm; leaf blade ovate or broadly elliptic.		19 E. taliensis
76 (74)	Leaf blade with 8-12 lateral veins per side of midrib, base rounded.		30 E. lanceolata
+	Leaf blade with 5-7 lateral veins per side of midrib		(77)
77 (76)	Calyx lobes ovate-triangular, ca. 2.5 mm; young shoots with rust-colored scales.		31 E. viridis
+	Calyx lobes narrowly triangular, ca. 4 mm; young shoots with grayish yellow or brown scales		(78)
78 (77)	Leaf blade papery, 2-3 cm wide, adaxially brown when dried.		32 E. longiloba
+	Leaf blade leathery, 4.5-5 cm wide, adaxially green when dried.		33 E. xichouensis