1	Terminal inflorescences simple racemes or flowers solitary.		(2)
+	Terminal inflorescences cymose panicles or subracemes, rarely corymbs, or flowers several or solitary.		(24)
2 (1)	Flowers solitary, rarely in clusters of 2 or 3, terminal or axillary.		(3)
+	Terminal inflorescences simple racemes; leaves palmately compound, 3–5-foliolate, or simple.		(6)
3 (2)	Leaves compound, 3-foliolate, both surfaces sparsely soft hairy.		(4)
+	Leaves simple, glabrous or adaxially sparsely pubescent and abaxially tomentose.		(5)
4 (3)	Plants with stalked glands; lateral leaflets suborbicular or ovate; flowers 3–4 cm in diam.; pedicel 3–4 cm; pistils numerous.		179 R. wardii
+	Plants without stalked glands; lateral leaflets ovate or elliptic; flowers 1–1.5 cm in diam.; pedicel ca. 1 cm; pistils not numerous.		180 R. metoensis
5 (3)	Leaves leathery, both surfaces glabrous, margin subentire or sparsely serrulate, base rounded to subtruncate; petioles 0.5–1 cm; aggregate fruit ovoid-globose, densely thinly gray pubescent.		181 R. jambosoides
+	Leaves not leathery, adaxially sparsely pubescent, abaxially tomentose, margin aristate-serrate, base deeply cordate to subauriculate; petioles 2–2.5 cm; aggregate fruit globose, glabrous at maturity.		182 R. lohfauensis
6 (2)	Leaves palmately compound, 3–5-foliolate.		(7)
+	Leaves simple.		(8)
7 (6)	Stipules and bracts palmately parted; leaflets sharply serrate; soft hairs of stamens deciduous in age.		160 R. playfairianus
+	Stipules and bracts usually entire or only apically serrate; leaflets sparsely minute serrate; soft hairs of stamens persistent in age.		161 R. bambusarum
8 (6)	Leaves deeply divided.		(9)
+	Leaves undivided or lobed.		(10)
9 (8)	Leaves lobes lanceolate or narrowly oblong, margin sparsely minute sharply serrate; inflorescences and calyx without glandular hairs, or only abaxial surface of calyx with sparse, glandular hairs; aggregate fruit black.		162 R. henryi
+	Leaf lobes elliptic or oblong, margin densely coarsely sharply serrate; inflorescences and calyx with sparse, glandular hairs; aggregate fruit red.		163 R. huangpingensis
10 (8)	Inflorescences stipitate glandular.		(11)
+	Inflorescences not stipitate glandular.		(17)
11 (10)	Stipules and bracts palmatipartite nearly to base, late caducous; inflorescences and abaxial surface of calyx villous, with sparse, glandular hairs, without needle-like prickles.		170 R. refractus
+	Stipules and bracts entire or toothed, caducous; inflorescence and calyx with stipitate glands and needle-like prickles.		(12)
12 (11)	Leaves leathery, undivided, abaxially yellowish brown to rust colored tomentose; inflorescences and calyx with stipitate glands, with intermixed needle-like prickles.		164 R. dunnii
+	Leaves not leathery, undivided or lobed, abaxially gray to rust colored tomentose; inflorescences and calyx with unequal stipitate glands and needle-like prickles.		(13)
13 (12)	Abaxial surface of leaves rust colored tomentose.		(14)
+	Abaxial surface of leaves gray to yellowish gray tomentose.		(15)
14 (13)	Leaves lanceolate to elliptic-lanceolate, base rounded to truncate, rarely shallowly cordate, not divided; abaxial surface of calyx tomentose; aggregate fruit dark red.		168 R. gressittii
+	Leaves ovate to ovate-lanceolate, base cordate, lobed or undulate; abaxial surface of calyx tomentose-villous; aggregate fruit black.		169 R. lichuanensis
15 (13)	Leaves cordate at base, broadly ovate, lobed; inflorescences and abaxial surface of calyx with glandular hairs 2–4 mm, with needle-like prickles.		167 R. hanceanus
+	Leaves rounded or truncate to shallowly cordate at base, undivided; inflorescences and calyx with glandular hairs 1–2 cm, unarmed.		(16)
16 (15)	Hairs of leaves of fruiting branchlets deciduous in age; sepals ovate or triangular-ovate.		165 R. swinhoei
+	Hairs of leaves of fruiting branchlets persistent in age; sepals lanceolate or triangular- lanceolate.		166 R. doyonensis
17 (10)	Abaxial surface of leaves glabrous, or slightly hairy only along veins; terminal inflorescences corymbose racemes.		178 R. kawakamii
+	Abaxial surface of leaves tomentose; terminal inflorescences racemes.		(18)
18 (17)	Leaves not leathery, abaxially gray or yellowish gray tomentose, coarsely sharply serrate.		(19)
+	Leaves leathery, abaxially densely yellowish to rust colored tomentose, minutely shallowly serrate.		(21)
19 (18)	Aggregate fruit red; pedicel 1.5–3.5 cm; outer sepals apically laciniate, inner sepals entire; leaves basally subtruncate to shallowly cordate; stamens with few hairs only on anthers.		175 R. hemithyrsus
+	Aggregate fruit purplish black; pedicel 0.7–1.5 cm; outer and inner sepals entire; leaves basally subrounded to subtruncate; stamens villous or glabrous.		(20)
20 (19)	Leaves narrowly obovate or broadly ovate-lanceolate to narrowly lanceolate, base rounded to subtruncate; stamens glabrous or anthers slightly villous; styles ca. as long as or slightly longer then stamens.		176 R. preptanthus
+	Leaves elliptic or oblong-elliptic, base subrounded; stamens villous; styles much longer than stamens.		177 R. malifolius
21 (18)	Pedicel and abaxial surface of calyx with dense, needle-like prickles; leaves abaxially yellowish brown tomentose.		171 R. fujianensis
+	Pedicel and abaxial surface of calyx unarmed; leaves abaxially rust colored or yellowish tomentose.		(22)
22 (21)	Aggregate fruit black at maturity; leaves abaxially rust colored tomentellate, lateral veins 5–8 pairs; style villous.		174 R. caudifolius
+	Aggregate fruit red at maturity; leaves abaxially densely yellowish or yellowish brown tomentose, lateral veins 7–11 pairs; styles glabrous or villous.		(23)
23 (22)	Leaves densely yellowish tomentose abaxially, lateral veins 8–11 pairs; petioles 0.8–1.5 cm; styles and ovary glabrous.		172 R. oblongus
+	Leaves densely yellowish brown tomentose abaxially, lateral veins 7–9 pairs; petioles 1.5–3 cm; styles and apex of ovary hairy.		173 R. liui
24 (1)	Leaves palmately compound, 3–5-foliolate, rarely simple.		(25)
+	Leaves simple.		(27)
25 (24)	Leaflets pinnately veined with (20–)30–50 pairs of lateral veins, abaxially densely sericeous; stipules and bracts not lobed.		91 R. lineatus
+	Leaflets reticulately veined, lateral veins few; abaxially tomentose or pilose; stipules and bracts palmately divided or not.		(26)
26 (25)	Abaxial surface of leaflets tomentose; stipules and bracts 5–10 mm, palmately divided.		92 R. cochinchinensis
+	Abaxial surface of leaflets pilose; stipules and bracts leaflike, 20–35 mm, not divided, serrate.		93 R. foliaceistipulatus
27 (24)	Stipules and bracts broader, usually 2–5 × 1–2 cm, rarely smaller, divided or serrate.		(28)
+	Stipules and bracts narrower, less than 2 × 1 cm, rarely broader, divided and entire.		(33)
28 (27)	Leaves abaxially glabrous except soft hairy along veins, lobed; stipules broadly to narrowly ovate, 2–3 cm.		159 R. wangii
+	Leaves abaxially densely tomentose or sericeous-villous, undulate, inconspicuously lobed or lobed; stipules oblong lanceolate, suborbicular, broadly ovate, to oblong, 1.5–5 cm.		(29)
29 (28)	Leaves abaxially densely sericeous-villous, undulate or 3–5-lobed; flowers solitary or in clusters of 2 or 3.		158 R. crassifolius
+	Leaves abaxially tomentose, with narrow caudate lobes above middle or with broad obtuse or acute lobes; terminal inflorescences narrow cymose panicles or subracemes.		(30)
30 (29)	Stipules oblong-lanceolate, 2–4(–5) cm; leaves elliptic or ovate-elliptic, rarely suborbicular, with irregular narrow caudate lobes above middle; inflorescences and calyx gray tomentose.		154 R. yiwuanus
+	Stipules broadly ovate or oblong, 1.5–3 cm; leaves suborbicular or broadly ovate to narrowly ovate, with broad obtuse or acute lobes; inflorescences and calyx villous or tomentose.		(31)
31 (30)	Leaves broadly ovate to narrowly ovate, abaxially gray tomentose, apically acuminate, margin inconspicuously lobed; inflorescences and calyx with soft hairs.		157 R. pacificus
+	Leaves suborbicular or broadly ovate, abaxially with gray, yellowish gray, or yellowish brown hairs, apically acute or obtuse, margin undulate to lobed; inflorescences villous or tomentose.		(32)
32 (31)	Stipules broadly ovate or broadly oblong, 1.5–2 cm; leaves 5–7-lobed, lobes acute apically; inflorescences and calyx villous.		155 R. stipulosus
+	Stipules oblong, 2–3 cm; leaves undulate or inconspicuously lobed, lobes obtuse apically, rarely acute; inflorescences and calyx tomentose.		156 R. irenaeus
33 (27)	Leaves abaxially ± soft hairy, rarely glabrous.		(34)
+	Leaves abaxially densely tomentose.		(49)
34 (33)	Subshrubs, nearly creeping, villous; inflorescences subracemes, several-flowered; leaves cordate at base.		153 R. hypopitys
+	Shrubs climbing or upright, taller; inflorescences cymose panicles or subracemes, many flowered, rarely few flowered; leaves rounded, subtruncate, or cordate at base.		(35)
35 (34)	Leaves rounded or subtruncate, rarely shallowly cordate at base.		(36)
+	Leaves cordate at base.		(41)
36 (35)	Plants densely yellow glandular; inflorescences minutely soft hairy; abaxial surface of calyx subglabrous.		138 R. taronensis
+	Plant without glands; inflorescences pubescent or glabrous; abaxial surface of calyx pubescent or glabrous.		(37)
37 (36)	Leaves basally truncate to subcordate.		(38)
+	Leaves basally rounded.		(39)
38 (37)	Leaves, inflorescences, and abaxial surface of calyx thinly pubescent; leaves elliptic or oblong, margin coarsely obtusely dentate.		142 R. yunanicus
+	Leaves, inflorescences, and abaxial surface of calyx yellowish sericeous-villous; leaves oblong or ovate-oblong to elliptic, margin minutely sharp-serrate.		143 R. poliophyllus
39 (37)	Petioles to 1 cm; inflorescences and abaxial surface of calyx pubescent; carpels 5–10(–17).		139 R. pirifolius
+	Petioles (0.7–)1–2 cm; inflorescences and abaxial surface of calyx glabrous or soft hairy; carpels more, usually more than 10, to many.		(40)
40 (39)	Petioles 1–2 cm; leaves ovate-oblong or lanceolate, margin sparsely minute sharply serrate; inflorescences and abaxial surface of calyx glabrous.		140 R. acuminatus
+	Petioles 0.7–1 cm; leaves oblong-lanceolate, margin coarsely sharply serrate; inflorescences and abaxial surface of calyx soft hairy.		141 R. brevipetiolatus
41 (35)	Terminal inflorescences large lax cymose panicles.		(42)
+	Terminal inflorescences narrow cymose panicles or subracemes.		(44)
42 (41)	Plants glandular; leaves broadly ovate or narrowly obovate; sepals undivided; petals soft hairy on both surfaces.		144 R. forrestianus
+	Plants not glandular; leaves narrowly to broadly ovate; sepals undivided or pinnately laciniate; petals slightly pubescent or glabrous.		(43)
43 (42)	Leaves narrowly ovate; pedicel 1–2 cm; sepals ovate or ovate-triangular, outer sepals pinnately laciniate; petals slightly pubescent.		145 R. laxus
+	Leaves broadly ovate, rarely oblong-ovate; pedicel 0.5–1 cm; sepals ovate-lanceolate or triangular-lanceolate, undivided; petals glabrous.		146 R. lambertianus
44 (41)	Abaxial surface of calyx with needle-like prickles.		(45)
+	Abaxial surface of calyx without needle-like prickles.		(46)
45 (44)	Leaves 6–9 × 5–7 cm; pedicel less than 1 cm; sepals broadly ovate, outer sepals pinnately divided; aggregate fruit 1–1.2 cm in diam.		147 R. calycacanthus
+	Leaves 10–17 × 15–20 cm; pedicel 1.5–2.5 cm; sepals lanceolate or ovate-lanceolate, outer sepals apically 2- or 3-laciniate; aggregate fruit 1.4–1.8 cm in diam.		148 R. gongshanensis
46 (44)	Plants usually without stalked glands, villous; leaves oblong to ovate-oblong; stipules 6–9 mm, deeply divided.		152 R. howii
+	Plants usually with stalked glands, soft hairy or glabrous; leaves lanceolate to ovate or broadly oblong.		(47)
47 (46)	Plants with stalked glands, soft hairs, and bristles; leaves narrowly ovate or broadly oblong; petiole 2–3 cm; stipules deeply pinnate-laciniate.		149 R. menglaensis
+	Plants soft hairy or glabrous, with sparse, stalked glands; leaves lanceolate, ovate-l anceolate or oblong-lanceolate; petiole 1–4 cm; stipules subulate or linear-lanceolate to oblong-lanceolate, margin entire and palmatifid.		(48)
48 (47)	Leaves ovate-lanceolate, base deeply cordate, basal incision broad; stipules subulate or linear-lanceolate, margin entire.		150 R. ichangensis
+	Leaves lanceolate or oblong-lanceolate, base cordate-auriculate, basal incision narrow; stipules oblong-lanceolate or ovate-lanceolate, palmatifid.		151 R. latoauriculatus
49 (33)	Leaves narrow, ovate-oblong or ovate-lanceolate to lanceolate, not divided, rarely lobed basally, pinnately veined; petioles 0.5–2(–4) cm.		(50)
+	Leaves broad, suborbicular, broadly ovate, or elliptic to oblong, not divided or lobed, palmately 5-veined from base; petioles more than 2 cm, rarely shorter.		(55)
50 (49)	Leaves basally rounded to shallowly cordate; petioles 0.5–1.5 cm; plants with or without stalked glands.		(51)
+	Leaves basally deeply cordate; petioles 0.5–3.5 cm; plants with stalked glands.		(53)
51 (50)	Plants without stalked glands; petioles 1–1.5 cm; leaves oblong-lanceolate, abaxially densely yellow or grayish yellow tomentose.		96 R. xichouensis
+	Plants wholly or partly with stalked glands; petioles 0.5–0.8 cm; leaves lanceolate or oblong, abaxially densely gray tomentose.		(52)
52 (51)	Stipules and bracts palmately divided above middle; leaves subleathery, lanceolate; branchlets, petioles, and inflorescences glabrous, stalked glands not present; abaxial surface of calyx tomentose, with stalked glands.		94 R. dolichophyllus
+	Stipules and bracts deeply divided to below middle or to base; leaves papery, lanceolate or oblong; branchlets, petioles, inflorescences, and abaxial surface of calyx yellowish villous, with sparse, glandular hairs.		95 R. raopingensis
53 (50)	Stipules and bracts linear or lanceolate, entire; terminal inflorescences narrow cymose panicles or short subracemes; petioles 1–1.5 cm.		99 R. angustibracteatus
+	Stipules and bracts palmate-laciniate; terminal inflorescences broad cymose panicles; petioles 0.5–3.5 cm.		(54)
54 (53)	Adaxial surface of leaves appressed villous, basal incision shallow, broad, 2 basal short lobes not touching; petioles often 0.5–1 cm, rarely longer; sepals 0.5–1 cm, shortly acuminate.		97 R. parkeri
+	Adaxial surface of leaves hairy only along veins, basal incision narrow, to 2 cm deep, 2 basal long lobes touching; petioles 2–3.5 cm; sepals 1–1.5 cm, apex subulate or long caudate.		98 R. panduratus
55 (49)	Leaves abaxially densely rusty yellow or rust colored, rarely rufous tomentose; terminal inflorescences short subracemes, rarely cymose panicles, with few flowers.		(56)
+	Leaves abaxially densely gray or yellowish gray tomentose.		(62)
56 (55)	Leaf base cuneate to rounded, undivided.		(57)
+	Leaf base cordate, divided, or undivided.		(58)
57 (56)	Leaves narrowly ovate, rarely elliptic, with 8–10 pairs of lateral veins; terminal inflorescences lax cymose panicles, many flowered.		131 R. penduliflorus
+	Leaves ovate, with 4 or 5 pairs of lateral veins; terminal inflorescences short subracemes, few flowered.		132 R. malipoensis
58 (56)	Leaves not divided or 2-lobed basally.		(59)
+	Leaves divided or undulate.		(60)
59 (58)	Leaves ovate or narrowly ovate, undivided or somewhat undulate; stipules and bracts only apically palmately lobed; anthers and styles glabrous.		136 R. flagelliflorus
+	Leaves oblong-lanceolate or ovate-lanceolate, usually with 2 distinct lobes near base; stipules and bracts palmately parted basally; anthers and styles sericeous-villous.		137 R. hastifolius
60 (58)	Leaves narrowly ovate, 3–5(–7)-lobed; stipules and bracts broadly obovate, 1–1.4 × 0.9–1.3 cm, pectinately or palmately divided; terminal inflorescences short subracemes, densely rust colored villous; abaxial surface of calyx rust colored villous, tomentose.		135 R. reflexus
+	Leaves ovate to suborbicular, lobed or undulate; stipules oblong, oblong-lanceolate to ovate-lanceolate, pinnate-laciniate or only apically palmately lobed; terminal inflorescence compact panicle or short subraceme; abaxial surface of calyx densely rust colored sericeous or yellow sericeous-villous or tomentose.		(61)
61 (60)	Leaves 12–20 × 8–16 cm; stipules oblong-lanceolate, to 1.5 cm, pinnate-laciniate; terminal panicles compact, many flowered; calyx densely rust colored tomentose.		133 R. fuscifolius
+	Leaves 8–11 × 5–9 cm; stipules oblong or ovate-lanceolate, less than 1 cm, only apically palmately lobed; terminal inflorescences short subracemes, few flowered; abaxial surface of calyx yellow sericeous-villous, margin of sepals tomentose.		134 R. shihae
62 (55)	Leaves ovate, narrowly ovate, or ovate-lanceolate to oblong, rarely broadly ovate or suborbicular, undivided or lobed, apically acuminate, rarely acute or obtuse; terminal inflorescences large broad cymose panicles, to 27 cm, rarely racemose.		(63)
+	Leaves suborbicular, broadly ovate to broadly oblong, lobed, apically obtuse or acute, rarely acuminate; terminal inflorescences always narrow cymose panicles or racemose, less than 17 cm.		(77)
63 (62)	Plants with glandular hairs or bristles.		(64)
+	Plants without glandular hairs, rarely pedicel and abaxial surface of calyx with stalked glands.		(67)
64 (63)	Plants tomentose, bristly; leaves suborbicular, abaxially densely gray tomentose; fruit purplish black.		103 R. tephrodes
+	Plants pubescent, not bristly; leaves ovate or orbicular-ovate to narrowly ovate; fruit red, purplish red or purplish black.		(65)
65 (64)	Leaves subleathery, broadly ovate or orbicular-ovate, abaxially yellowish tomentose; plants with stipitate glands ca. 1 mm; abaxial surface of calyx tomentose.		102 R. luchunensis
+	Leaves not leathery, narrowly to broadly ovate or orbicular-ovate, abaxially gray tomentose; plants with stipitate glands 2–3 mm; abaxial surface of calyx villous.		(66)
66 (65)	Leaves ovate to narrowly ovate, apically obtuse to acute, margin undulate-lobed, lobes obtuse; sepals undivided.		100 R. feddei
+	Leaves broadly ovate or orbicular-ovate, apically acuminate, margin divided, lobes acute; sepals laciniate.		101 R. salwinensis
67 (63)	Leaves distinctly lobed, base cordate; petioles 3–7 cm.		104 R. lobophyllus
+	Leaves undivided, sometimes lobed, base rounded or cordate; petioles; petioles 0.5–10 cm.		(68)
68 (67)	Leaves basally rounded, rarely subtruncate, oblong, ovate-oblong, or elliptic; petioles 0.5–1 cm.		105 R. assamensis
+	Leaves basally truncate to cordate, rarely suborbicular; petioles usually more than 2 cm.		(69)
69 (68)	Leaves basally truncate, broadly triangular-ovate.		106 R. tinifolius
+	Leaves basally cordate, rarely subrounded, suborbicular, broadly ovate.		(70)
70 (69)	Inflorescences and abaxial surface of calyx sericeous-villous.		(71)
+	Inflorescences and abaxial surface of calyx tomentose or tomentose-villous.		(74)
71 (70)	Leaves suborbicular or broadly ovate.		(72)
+	Leaves narrowly ovate or ovate-lanceolate.		(73)
72 (71)	Leaves thickly papery, base cordate, margin sharply serrate; terminal cymose panicles large, broad; flowers apetalous.		107 R. chroosepalus
+	Leaves leathery, base truncate to shallowly cordate, margin shallowly obtusely serrate; terminal cymose panicles small, narrow; flowers petalous.		108 R. mallotifolius
73 (71)	Shrubs deciduous; leaves 7–10 cm, lobed; petioles 2–4 cm, sparsely villous; pedicel and abaxial surface of calyx with sparse, minute stalked glands.		109 R. fuscorubens
+	Shrubs evergreen; leaves 11–22 cm, not divided or shallowly undulate; petioles 5–10 cm, glabrous; pedicel and abaxial surface of calyx without stalked glands.		110 R. jianensis
74 (70)	Leaf base rounded to shallowly cordate; flowers 6–8 mm in diam.; abaxial surface of calyx tomentose; flowers petalous or apetalous.		(75)
+	Leaf base cordate; flowers 8–18 mm in diam.; abaxial surface of calyx tomentose and villous; flowers petalous.		(76)
75 (74)	Leaves broadly ovate, rarely ovate-oblong, undivided; petioles glabrous; abaxial surface of calyx gray tomentose; flowers apetalous; aggregate fruit black.		111 R. cinclidodictyus
+	Leaves narrowly ovate to ovate-lanceolate, lobed; petioles tomentose; abaxial surface of calyx tomentose, gray tomentose on sepal margin; flowers petalous; aggregate fruit dark red.		112 R. xanthoneurus
76 (74)	Leaves ovate to narrowly ovate, apically acuminate; petioles 2–4 cm; flowers to 18 mm in diam.; terminal cymose panicles broad, lax.		113 R. paniculatus
+	Leaves broadly ovate to suborbicular, rarely narrowly ovate, apically acute; petioles 1–2.5 cm; flowers 8–10 mm in diam.; terminal cymose panicles short, compact.		114 R. neoviburnifolius
77 (62)	Stipules and bracts pinnately or palmately parted or irregularly lacerate nearly to base.		(78)
+	Stipules and bracts palmately or pinnately lobed, rarely parted.		(83)
78 (77)	Plants with dense, large stipitate glands; leaves suborbicular or broadly ovate, 4–6 cm; petioles 1–2 cm; sepals triangular-ovate, not divided.		115 R. nagasawanus
+	Plants without stipitate glands; leaves suborbicular to broadly ovate, 6–16 cm; petioles (2–)3–5(–8) cm; sepals apically 2- or 3-laciniate, with 3 bristles at apex or palmately to pinnately laciniate.		(79)
79 (78)	Leaves broadly ovate, undivided or slightly undulate, abaxially hairs deciduous at maturity; terminal inflorescences narrow panicles or racemose; sepals lanceolate, outer sepals apically 2- or 3-laciniate.		120 R. chrysobotrys
+	Leaves suborbicular or broadly ovate, distinctly 3–7-divided, abaxially persistently tomentose; terminal inflorescences short subracemes or cymose panicles; outer sepals entire with 3 bristles only at apex or palmately to pinnately laciniate.		(80)
80 (79)	Terminal inflorescences short subracemes, 3–6-flowered; sepals long obovate, outer sepals entire, with 3 bristles only at apex; adaxial surface of leaves not distinctly bullate between veins.		119 R. yuliensis
+	Terminal cymose panicles or subracemes, many flowered; sepals broadly ovate or triangular-ovate, outer sepals palmately to pinnately laciniate; adaxial surface of leaves prominently bullate or not.		(81)
81 (80)	Adaxial surface of leaves prominently bullate between veins; terminal inflorescences narrow cymose panicles or subracemes.		116 R. alceifolius
+	Adaxial surface of leaves not prominently bullate between veins; terminal inflorescences broad cymose panicles.		(82)
82 (81)	Branchlets, petioles, and inflorescences yellowish villous; pedicel 5–8 cm; petals and ovary pubescent.		117 R. platysepalus
+	Branchlets, petioles, and inflorescences grayish tomentose; pedicel 0.8–2 cm; petals pubescent; ovary glabrous.		118 R. arachnoideus
83 (77)	Plants with brownish bristles; leaves suborbicular, apically acute to caudate.		(84)
+	Plants without bristles; leaves suborbicular or broadly ovate, truncate, apically obtuse or acute.		(85)
84 (83)	Stipules and bracts 1.5–2 × 1.2–1.5 cm, parted, late caducous; flowers ca. 1 cm in diam.; sepals broadly ovate or ovate-lanceolate, apically caudate.		121 R. rufus
+	Stipules and bracts 1–1.2 × 0.7–1 cm, lobed, caducous; flowers 1.2–1.7 cm in diam.; sepals lanceolate or ovate-lanceolate, apically acute to shortly acuminate.		122 R. lasiotrichos
85 (83)	Shrubs low, climbing or prostrate; leaves abaxially glabrescent.		(86)
+	Shrubs larger, climbing; leaves abaxially persistently tomentose.		(87)
86 (85)	Branchlets, petioles, and inflorescences thinly pubescent; leaf lobes acute; abaxial surface of calyx gray to yellowish gray pubescent, intermixed tomentose; sepals broadly ovate, outer sepals pinnate-laciniate on margin.		129 R. hunanensis
+	Branchlets, petioles, and inflorescences tomentose-villous; leaf lobes often obtuse; abaxial surface of calyx densely yellowish villous, intermixed tomentose; sepals lanceolate or ovate-lanceolate, outer sepals only apically lobed.		130 R. buergeri
87 (85)	Terminal inflorescences short subracemes, few flowered; stipules and bracts broadly flabellate or broadly ovate to broadly oblong, 1–1.5(–2) × (0.6–)1–1.5 cm, pinnately or palmately parted to base.		(88)
+	Terminal inflorescences narrow cymose panicles or subracemes, many flowered; stipules and bracts subflabellate, obovate or ovate to ovate-lanceolate, 0.7–1.8 cm, pectinately to palmately divided or laciniate.		(89)
88 (87)	Leaves 3–5-lobed, lobes acute, rarely obtuse; stipules and bracts broadly ovate to broadly oblong; pedicel 3–4 mm; sepals triangular to ovate, outer sepals entire or only apically lobed.		127 R. formosensis
+	Leaves 5–7-lobed, lobes obtuse or acute; stipules and bracts broadly flabellate; pedicel 7–10(–15) mm; sepals narrowly ovate or ovate-lanceolate, outer sepals pinnately parted.		128 R. pinnatisepalus
89 (87)	Stipules and bracts subflabellate, broadly elliptic, or broadly obovate, 1–1.8 cm and ca. as broad, pectinately to palmately divided.		(90)
+	Stipules and bracts ovate or ovate-lanceolate, rarely narrowly obovate, 0.7–1.1 cm and nearly as broad, apex palmate-laciniate.		(90)
90 (89)	Leaves palmately 7–9-lobed, terminal lobe obtuse or subtruncate, rarely acute; lobes of stipules usually undivided; pedicel 1–1.5 cm; flowers white, 1.5–2.5 cm in diam.		123 R. pluribracteatus
+	Leaves usually 5-lobed, terminal lobe acute; lobes of stipules divided again; pedicel 1.5–3(–4) cm; flowers yellowish white or white, 1–1.5 cm in diam.		124 R. reticulatus
91	Leaves 5–7-lobed, lobes obtuse, rarely acute, sepals ovate-lanceolate, apically caudate; flowers purplish red; aggregate fruit black.		125 R. setchuenensis
+	Leaves 7–11-lobed, lobes acute; sepals broadly ovate, apically acute; flowers white; aggregate fruit red.		126 R. faberi