1	Leaf blade margin entire, crenate, repand, or apically with 1-4 or rarely more shallow serrations, or indistinctly serrulate.		(2)
+	Leaf blade margin serrate or serrulate on at least apical 1/3.		(35)
2 (1)	Leaf blade 12 cm or more.		(3)
+	Leaf blade less than 12 cm.		(14)
3 (2)	Cupules 1-1.5 cm in diam.		(4)
+	Cupules 1.5-4 cm in diam.		(7)
4 (3)	Petiole 0.5-1 cm, not sulcate.		(5)
+	Petiole 2-5 cm, adaxially sulcate.		(6)
5 (4)	Leaf blade abaxially glabrous, midvein impressed; cupules outside tomentose, enclosing ca. 1/3 of nut		17 Cyclobalanopsis sessilifolia
+	Leaf blade abaxially slightly farinose, midvein raised; cupules outside glabrous or puberulent, enclosing ca. 1/2 of nut		18 Cyclobalanopsis augustinii
6 (4)	Branchlets and leaves glabrous; cupules cupular		1 Cyclobalanopsis jenseniana
+	Branchlets and leaves hairy; cupules bowl-shaped		23 Cyclobalanopsis tomentosinervis
7 (3)	Branchlets glabrous.		(8)
+	Branchlets tomentose.		(10)
8 (7)	Secondary veins 6-8 on each side of midvein		15 Cyclobalanopsis albicaulis
+	Secondary veins 9-12 on each side of midvein.		(9)
9 (8)	Cupules bowl-shaped, enclosing ca. 2/3 of nut; nuts oblate, scar 2-2.5 cm in diam.		5 Cyclobalanopsis tenuicupula
+	Cupules campanulate to obconic, enclosing less than 1/2 of nut; nuts ellipsoid, scar ca. 0.8 cm in diam.		20 Cyclobalanopsis saravanensis
10 (7)	Petiole and leaves glabrous.		(11)
+	Petiole and leaves tomentose.		(12)
11 (10)	Nuts subglobose, ca. 1.7 cm, sericeous		3 Cyclobalanopsis camusiae
+	Nuts oblong-ellipsoid, 3.5-4 cm, pilose		4 Cyclobalanopsis semiserrata
12 (10)	Leaf blade midvein adaxially slightly raised; cupules campanulate to cylindric, enclosing ca. 2/3 of nut		2 Cyclobalanopsis fleuryi
+	Leaf blade midvein adaxially impressed or flat; cupules bowl-shaped to discoid, enclosing base to 1/2 of nut.		(13)
13 (12)	Midvein adaxially flat; cupule covering only base of nut, bracts in 4-6 rings; nut scar 0.7-1 cm in diam.		14 Cyclobalanopsis hui
+	Midvein adaxially impressed; cupule covering 1/3-1/2 of nut, bracts in 8-10 rings; nut scar 1.2-1.4 cm in diam.		27 Cyclobalanopsis helferiana
14 (2)	Leaf blade apex obtuse, rounded, retuse, or with a short, blunt tip.		(15)
+	Leaf blade apex acute, acuminate, or caudate.		(20)
15 (14)	Nuts oblate, subglobose, or broadly ovoid.		(16)
+	Nuts ellipsoid to oblong-ellipsoid, or obovoid.		(18)
16 (15)	Leaf blade midvein adaxially flat; cupule covering only base of nut; nuts tomentose		14 Cyclobalanopsis hui
+	Leaf blade midvein slightly impressed to impressed; cupule enclosing 1/3-1/2 of nut; nuts glabrous or glabrescent.		(17)
17 (16)	Petiole 0.2-0.8 cm; cupule bracts in 7-9 rings; nuts glabrous, scar 5-8 mm in diam.		10 Cyclobalanopsis obovatifolia
+	Petiole 0.8-1.5 cm; cupule bracts in 4-7 rings; nuts hairy when young, scar 4-5 mm in diam.		12 Cyclobalanopsis championii
18 (15)	Petiole 1-1.5 cm; cupules 2-2.5 cm in diam.; nuts 1.7-2 cm in diam.		6 Cyclobalanopsis dinghuensis
+	Petiole less than 0.5 cm; cupules 1-1.5 cm in diam.; nuts 1-1.6 cm in diam.		(19)
19 (18)	Cupules saucer-shaped to cupular, 1.3-1.5(-1.8) cm in diam., covering only base of nut		11 Cyclobalanopsis neglecta
+	Cupules bowl-shaped, 1-1.2 cm in diam., enclosing ca. 1/3 of nut		7 Cyclobalanopsis litseoides
20 (14)	Leaf blade abaxially hairy.		(21)
+	Leaf blade abaxially glabrous at least when old or only puberulent.		(27)
21 (20)	Leaf blade abaxially stellate or stellate tomentose at least when young.		(22)
+	Leaf blade abaxially woolly, villous, or tomentose at least when young.		(24)
22 (21)	Nuts ellipsoid, ovoid-ellipsoid, or globose		65 Cyclobalanopsis poilanei
+	Nuts oblate to subglobose.		(23)
23 (22)	Petiole 0.2-0.8 cm; secondary veins 5-8 on each side of midvein; nuts glabrous, scar 5-8 mm in diam.		10 Cyclobalanopsis obovatifolia
+	Petiole (0.5-)1-2 cm; secondary veins 10-15 on each side of midvein; nuts velutinous, scar ca. 10 mm in diam.		13 Cyclobalanopsis chungii
24 (21)	Petiole 2-3.5 cm; leaf blade apex caudate, midvein abaxially impressed		23 Cyclobalanopsis tomentosinervis
+	Petiole 0.5-1.4 cm; leaf blade apex acute to acuminate, midvein abaxially flat.		(25)
25 (24)	Petiole triangular in cross section; nut scar slightly convex		22 Cyclobalanopsis hypophaea
+	Petiole not triangular in cross section; nut scar flat or impressed.		(26)
26 (25)	Branchlets light brown woolly; petiole 0.6-0.8 cm; leaf blade tertiary veins inconspicuous; nuts ovoid-ellipsoid to ellipsoid		8 Cyclobalanopsis tiaoloshanica
+	Branchlets orangish brown tomentose; petiole 1-1.4 cm; leaf blade tertiary veins slender but evident; nuts oblate		14 Cyclobalanopsis hui
27 (20)	Nuts oblate or subglobose, scar 1-2.5 cm in diam.		(28)
+	Nuts not oblate nor subglobose, scar 0.4-0.8 cm in diam.		(29)
28 (27)	Leaf blade leathery; nuts oblate, ca. 1.7 cm in diam., scar ca. 1 cm in diam.		3 Cyclobalanopsis camusiae
+	Leaf blade papery; nuts subglobose, 2.5-3 cm in diam., scar 2-2.5 cm in diam.		5 Cyclobalanopsis tenuicupula
29 (27)	Cupules campanulate to obconic or bowl-shaped, 2-3 cm in diam.		(30)
+	Cupules cupular, 0.8-1.8 cm in diam.		(31)
30 (29)	Leaf blade papery, pubescent when young; cupules campanulate to obconic, outside puberulent		15 Cyclobalanopsis albicaulis
+	Leaf blade subleathery, glabrous; cupules bowl-shaped, outside villous		20 Cyclobalanopsis saravanensis
31 (29)	Leaf blade apex acute to acuminate.		(32)
+	Leaf blade apex caudate.		(33)
32 (31)	Leaf blade abaxially glabrous, midvein impressed; cupules outside tomentose, enclosing ca. 1/3 of nut		17 Cyclobalanopsis sessilifolia
+	Leaf blade abaxially slightly farinose, midvein raised; cupules outside glabrous or puberulent, enclosing ca. 1/2 of nut		18 Cyclobalanopsis augustinii
33 (31)	Petiole 0.5-0.8 cm; nuts 0.6-0.8(-1.5) cm in diam.		19 Cyclobalanopsis chevalieri
+	Petiole 1-2 cm; nuts 1-1.5 cm in diam.		(34)
34 (33)	Leaf blade papery; cupules 1.6-1.8 cm in diam., enclosing ca. 1/3 of nut; nuts ellipsoid, ca. 1.5 cm in diam., velutinous at least apically		16 Cyclobalanopsis delicatula
+	Leaf blade subleathery; cupules ca. 1.5 cm in diam., enclosing ca. 1/2 of nut; nuts ovoid-conical, 1-1.3 cm in diam., glabrous		21 Cyclobalanopsis motuoensis
35 (1)	Leaf blade 14 cm or more.		(36)
+	Leaf blade less than 14 cm.		(58)
36 (35)	Leaf blade margin serrate or serrulate on apical 1/2 or less.		(37)
+	Leaf blade margin serrate or serrulate at least on apical 2/3.		(46)
37 (36)	Leaf blade secondary veins 18-22 on each side of midvein		24 Cyclobalanopsis rex
+	Leaf blade secondary veins 8-14 on each side of midvein (sometimes to 16 in C. thorelii).		(38)
38 (37)	Leaf blade less than 2.5 × as long as wide.		(39)
+	Leaf blade 3 × or more as long as wide.		(42)
39 (38)	Leaf blade apex shortly acute to ± caudate; cupules enclosing 1/2-2/3 of nut.		(40)
+	Leaf blade apex with a short, blunt tip; cupules enclosing 1/4-1/3 of nut.		(41)
40 (39)	Leaf blade papery; cupules enclosing ca. 2/3 of nut		5 Cyclobalanopsis tenuicupula
+	Leaf blade leathery; cupules enclosing to 1/2 of nut		34 Cyclobalanopsis kiukiangensis
41 (39)	Petiole 1-1.8 cm; leaf blade margin serrate; cupule bracts in 8-12 rings; nut scar 0.8-1 cm in diam.		37 Cyclobalanopsis phanera
+	Petiole 2-3 cm; leaf blade margin serrulate; cupule bracts in 6-8 rings; nut scar ca. 0.7 cm in diam.		38 Cyclobalanopsis edithiae
42 (38)	Cupules discoid or cupular.		(43)
+	Cupules semiglobose, campanulate, or cylindric.		(44)
43 (42)	Leaf blade pubescent when young; cupules 2.5-3 cm in diam.; nuts oblate, 2.2-3 cm in diam., scar 1-1.4 cm in diam.		35 Cyclobalanopsis bella
+	Leaf blade glabrous; cupules 1-1.2 cm in diam.; nuts ellipsoid to ovoid-ellipsoid, 1-1.2 cm in diam., scar ca. 0.5 cm in diam.		56 Cyclobalanopsis elevaticostata
44 (42)	Nuts ellipsoid, oblong-ellipsoid, or obovoid, 1.2-1.6 cm in diam., scar 0.5-0.7 cm in diam.		63 Cyclobalanopsis pachyloma
+	Nuts cylindric-ellipsoid, 2-3 cm in diam., scar 1.2-1.5 cm in diam.		(45)
45 (44)	Leaf blade midvein adaxially slightly raised; pistillate inflorescences 2.5-3.5 cm; cupule bracts in 10-13 rings, margin subentire; nut scar ca. 1.2 cm in diam.		2 Cyclobalanopsis fleuryi
+	Leaf blade midvein adaxially flat; pistillate inflorescences ca. 1.5 cm; cupule bracts in 8 or 9 rings, margin dentate; nut scar ca. 1.5 cm in diam.		39 Cyclobalanopsis kouangsiensis
46 (36)	Leaf blade abaxially with stellate or furcate hairs.		(47)
+	Leaf blade abaxially simple hairs or glabrous.		(50)
47 (46)	Cupules oblate to semiglobose, 3-5 cm in diam., enclosing 2/3-4/5 of nut; nuts 3-4 cm in diam.		25 Cyclobalanopsis lamellosa
+	Cupules cupular or discoid, 1.5-2.5 cm in diam., covering base to 1/2 of nut; nuts 1.5-2.8 cm in diam.		(48)
48 (47)	Petiole 1-2 cm; cupules discoid, 2-2.5 cm in diam.; nuts oblate, 2-2.8 cm in diam., scar 1-2 cm in diam.		26 Cyclobalanopsis kerrii
+	Petiole 2.5-4 cm; cupules cupular, 1.5-2 cm in diam.; nuts ovoid to ellipsoid, 1.2-1.7 cm in diam., scar ca. 0.8 cm in diam.		(49)
49 (48)	Leaf blade abaxially densely pale brown stellate tomentose; nuts hairy, glabrescent		28 Cyclobalanopsis gambleana
+	Leaf blade abaxially pruinose to whitish farinose and with adnate simple and furcate hairs but soon glabrescent; nuts glabrous or rarely pilose at apex		29 Cyclobalanopsis oxyodon
50 (46)	Nuts oblate.		(51)
+	Nuts ovoid to ellipsoid.		(54)
51 (50)	Leaf blade barbate in vein axils, midvein impressed; cupules oblate, 3.5-5 cm in diam.		43 Cyclobalanopsis sichourensis
+	Leaf blade not barbate in vein axils, midvein raised to slightly so; cupules saucer-shaped, bowl-shaped, or cupular, 1.5-3 cm in diam.		(52)
52 (51)	Petiole glabrous when young; cupules covering only base of nut; nuts glabrous or basally pilose		42 Cyclobalanopsis chapensis
+	Petiole hairy when young; cupules covering most of nut; nuts tomentose.		(53)
53 (52)	Cupules ca. 3 cm in diam., bract margins subentire; nuts 2.5-3 cm in diam., scar ca. 2 cm in diam.		40 Cyclobalanopsis thorelii
+	Cupules 1.5-1.8 cm in diam., bract margins dentate; nuts 1.3-1.8 cm in diam., scar ca. 1.2 cm in diam.		54 Cyclobalanopsis austrocochinchinensis
54 (50)	Leaf blade base ± truncate to somewhat auriculate		32 Cyclobalanopsis yonganensis
+	Leaf blade base cuneate to subrounded.		(55)
55 (54)	Leaf blade apex with a short, blunt tip; cupule bracts in 9-12 rings		33 Cyclobalanopsis litoralis
+	Leaf blade apex acute to acuminate; cupule bracts in 5-7 rings.		(56)
56 (55)	Cupules 2-3 cm in diam., covering only base of nut; nuts 1.5-3 cm in diam.		36 Cyclobalanopsis blakei
+	Cupules 1-1.5 cm in diam., covering 1/3-1/2 of nut; nuts 1-1.2 cm in diam.		(57)
57 (56)	Cupule bracts in 6 or 7 rings, margin subentire; nuts ca. 1 cm in diam., scar 3-5 mm in diam.		31 Cyclobalanopsis multinervis
+	Cupule bracts in 5 rings, margin dentate; nuts ca. 1.2 cm in diam., scar ca. 7 mm in diam.		46 Cyclobalanopsis pentacycla
58 (35)	Leaf usually less than 2.5(-3) × as long as wide.		(59)
+	Leaf blade 3 × as long as wide.		(86)
59 (58)	Leaf blade abaxially with stellate hairs at least when young.		(60)
+	Leaf blade abaxially with simple hairs or glabrous.		(65)
60 (59)	Leaf blade margin serrate on no more than apical 1/2.		(61)
+	Leaf blade margin serrate on apical ca. 2/3.		(63)
61 (60)	Cupules 3-3.5 cm in diam.; nuts ca. 2.5 cm in diam.		41 Cyclobalanopsis chingsiensis
+	Cupules 1-1.8 cm in diam.; nuts 1-1.5 cm in diam.		(62)
62 (61)	Leaf blade elliptic to obovate-elliptic; pistillate inflorescences 1-2 cm, with 3-7 cupules		65 Cyclobalanopsis poilanei
+	Leaf blade oblong to ovate-elliptic; pistillate inflorescences ca. 4 cm, with 2 or 3 cupules		66 Cyclobalanopsis delavayi
63 (60)	Leaf blade margin bluntly serrate		26 Cyclobalanopsis kerrii
+	Leaf blade margin sharply serrate.		(64)
64 (63)	Leaf blade secondary veins 9-11 on each side of midvein; cupules 2-3 cm in diam.; nuts oblate, 2.5-2.8 cm in diam.		57 Cyclobalanopsis patelliformis
+	Leaf blade secondary veins 13-16 on each side of midvein; cupules ca. 1.5 cm in diam.; nuts broadly ovoid, ca. 1.2 cm in diam.		64 Cyclobalanopsis lobbii
65 (59)	Mature leaf blades abaxially glabrous or subglabrous.		(66)
+	Mature leaf blades abaxially pubescent.		(76)
66 (65)	Leaf blade margin serrate for apical 2/3.		(67)
+	Leaf blade margin serrate from middle to apex or only apically.		(70)
67 (66)	Leaf blade secondary veins 7-9 on each side of midvein; cupules obconic		33 Cyclobalanopsis litoralis
+	Leaf blade secondary veins 11-17 on each side of midvein; cupules discoid, bowl-shaped, or cupular.		(68)
68 (67)	Leaf blade secondary veins 11-13 on each side of midvein, midvein adaxially impressed; cupules discoid, covering only base of nut		53 Cyclobalanopsis disciformis
+	Leaf blade secondary veins 13-17 on each side of midvein, midvein adaxially raised; cupules bowl-shaped to cupular, enclosing 1/3 to most of nut.		(69)
69 (68)	Branchlets with stellate hairs when young; leaf blade midvein adaxially raised; cupules ca. 3 cm in diam., enclosing almost all of nut; nuts 2.5-3 cm in diam.		40 Cyclobalanopsis thorelii
+	Branchlets glabrous; leaf blade midvein adaxially impressed; cupules ca. 1.5 cm in diam., enclosing 1/3-1/2 of nut; nuts 1.2-2 cm in diam.		50 Cyclobalanopsis lungmaiensis
70 (66)	Cupule bracts adherent to wall		19 Cyclobalanopsis chevalieri
+	Cupule bracts not adherent to wall.		(71)
71 (70)	Nuts 1-1.8 cm in diam.		(72)
+	Nuts 2-3 cm in diam.		(73)
72 (71)	Petiole 0.5-0.8 cm; leaf blade apex with a short, blunt tip; cupule enclosing ca. 1/3 of nut, bracts in 5 or 6 rings; nut scar 3-5 mm in diam.		9 Cyclobalanopsis daimingshanensis
+	Petiole 1.5-3 cm; leaf blade apex caudate; cupule enclosing ca. 1/2 of nut, bracts in 7 or 8 rings; nut scar ca. 10 mm in diam.		52 Cyclobalanopsis morii
73 (71)	Nuts semiglobose or oblate, scar more than 2 cm in diam.		5 Cyclobalanopsis tenuicupula
+	Nuts cylindric-ellipsoid to broadly ovoid, scar less than 1 cm in diam.		(74)
74 (73)	Leaf blade apex acuminate, margin with awnlike and incurved serrations; cupules enclosing ca. 1/2 of nut; nuts broadly ovoid, scar flat		30 Cyclobalanopsis austroglauca
+	Leaf blade apex with a short, blunt tip, margin serrate to serrulate; cupules enclosing 1/4-1/3 of nut; nuts cylindric to ellipsoid, scar slightly convex.		(75)
75 (74)	Petiole 1-1.8 cm; leaf blade margin serrate; cupule bracts in 8-12 rings; nut scar 0.8-1 cm in diam.		37 Cyclobalanopsis phanera
+	Petiole 2-3 cm; leaf blade margin serrulate; cupule bracts in 6-8 rings; nut scar ca. 0.7 cm in diam.		38 Cyclobalanopsis edithiae
76 (65)	Leaf blade abaxially not pruinose.		(77)
+	Leaf blade abaxially pruinose.		(79)
77 (76)	Leaf blade secondary veins 8-12 on each side of midvein; cupules 0.8-1.2 cm in diam., bracts in 6-8 rings; nuts 0.7-1 cm in diam.		68 Cyclobalanopsis glaucoides
+	Leaf blade secondary veins 12-18 on each side of midvein; cupules 1.8-5 cm in diam., bracts in 9-11 rings; nuts 1.5-4 cm in diam.		(78)
78 (77)	Petiole 2.5-3.5 cm, tomentose at least when young; leaf blade secondary veins 15-18 on each side of midvein; cupules oblate, 3.5-5 cm in diam.; nut 3-4 cm in diam.		43 Cyclobalanopsis sichourensis
+	Petiole 1-1.5 cm, glabrous; leaf blade secondary veins 12-14 on each side of midvein; cupules bowl-shaped, ca. 1.8 cm in diam.; nut ca. 1.5 cm in diam.		67 Cyclobalanopsis jinpinensis
79 (76)	Cupules obconic.		(80)
+	Cupules saucer-shaped, bowl-shaped, or cupular.		(81)
80 (79)	Petiole 1.5-2 cm, glabrous; leaf blade base subrounded and slightly oblique, secondary veins 13-15 on each side of midvein; cupule bract margins dentate		46 Cyclobalanopsis pentacycla
+	Petiole 0.5-1 cm, puberulent; leaf blade base cuneate, secondary veins 8-10 on each side of midvein; cupule bract margins subentire		69 Cyclobalanopsis xanthotricha
81 (79)	Leaf blade margin remotely serrulate		49 Cyclobalanopsis glauca
+	Leaf blade margin awnlike serrate.		(82)
82 (81)	Cupule bract margins entire or subentire.		(83)
+	Cupule bract margins of at least basal 1 or 2 denticulate or loosely dentate, others entire, subentire, or repand.		(84)
83 (82)	Cupules cupular; nuts ca. 1 cm in diam., glabrous, scar 3-5 mm in diam.		31 Cyclobalanopsis multinervis
+	Cupules bowl-shaped; nuts 1.1-1.4 cm in diam., loosely incanous, scar 6-7 cm in diam.		51 Cyclobalanopsis annulata
84 (82)	Leaf blade secondary veins 13-17 on each side of midvein		50 Cyclobalanopsis lungmaiensis
+	Leaf blade secondary veins 10-13 on each side of midvein.		(85)
85 (84)	Nut scar ca. 1 cm in diam., flat; stylopodium 4- or 5-ringed		30 Cyclobalanopsis austroglauca
+	Nut scar ca. 0.8 cm in diam., convex; stylopodium 3-ringed		34 Cyclobalanopsis kiukiangensis
86 (58)	Leaf blade margin serrate on apical 1/2 or on subapical part.		(87)
+	Leaf blade margin serrate at least on apical 2/3.		(101)
87 (86)	Leaf blade mostly broader from middle to apex.		(88)
+	Leaf blade mostly broader from base to middle.		(92)
88 (87)	Mature leaf blades abaxially glabrous or glabrescent.		(89)
+	Mature leaf blades abaxially not glabrescent.		(90)
89 (88)	Petiole 1.5-2 cm; cupule outside usually densely tawny tomentose, wall ca. 1.5 mm thick; nut densely tawny tomentose when young but glabrescent, scar slightly convex		63 Cyclobalanopsis pachyloma
+	Petiole 0.5-0.8(-1.2) cm; cupule outside glabrous, wall less than 1 mm thick; nut glabrous, scar flat		19 Cyclobalanopsis chevalieri
90 (88)	Nuts oblate, 1.4-1.7 cm in diam., scar ca. 1 cm in diam.		13 Cyclobalanopsis chungii
+	Nuts obovoid-ellipsoid, ovoid, or ellipsoid, 0.9-1.4 cm in diam., scar 0.5-0.6 cm in diam.		(91)
91 (90)	Leaf blade abaxially with simple or lepidote hairs, margin remotely serrate		49 Cyclobalanopsis glauca
+	Leaf blade abaxially stellate velutinous, margin with short, awnlike serrations		62 Cyclobalanopsis gilva
92 (87)	Cupules 2.5-3.4 cm in diam.; nuts 2.2-3 cm in diam., scar 1-1.5 cm in diam.		(93)
+	Cupules 0.6-1.8 cm in diam.; nuts 0.8-1.7 cm in diam., scar 0.4-0.8 cm in diam.		(94)
93 (92)	Petiole glabrous; cupules discoid, covering only base of nut; nuts oblate		35 Cyclobalanopsis bella
+	Petiole tomentose; cupules campanulate, enclosing more than 1/2 of nut; nuts cylindric-ellipsoid		39 Cyclobalanopsis kouangsiensis
94 (92)	Cupules obconic		69 Cyclobalanopsis xanthotricha
+	Cupules saucer-shaped, bowl-shaped, or cupular.		(95)
95 (94)	Leaf blade abaxially pruinose; secondary veins inconspicuous.		(96)
+	Leaf blade abaxially not pruinose; secondary veins evident.		(97)
96 (95)	Leaf blade margin conspicuously serrate; cupule bracts connate at apex; nut scar slightly convex		18 Cyclobalanopsis augustinii
+	Leaf blade margin serrulate; cupule bracts not connate at apex; nut scar flat		61 Cyclobalanopsis myrsinifolia
97 (95)	Petiole 0.5-0.8 cm		19 Cyclobalanopsis chevalieri
+	Petiole 1-3 cm.		(98)
98 (97)	Leaf blade glabrous; cupule enclosing ca. 1/3 of nut		56 Cyclobalanopsis elevaticostata
+	Leaf blade abaxially variously pubescent; cupule enclosing ca. 1/2 of nut.		(99)
99 (98)	Branchlets and petioles stellate tomentose; leaf blade secondary veins 10-14 on each side of midvein; cupule bract margins shallowly denticulate		66 Cyclobalanopsis delavayi
+	Branchlets and petioles glabrous; leaf blade secondary veins 7-10 on each side of midvein; cupule bract margins dentate.		(100)
100 (99)	Leaf blade brownish when dry, margin remotely and shallowly serrate; cupules cupular, outside whitish pilose but glabrescent		59 Cyclobalanopsis stewardiana
+	Leaf blade not brownish when dry, margin serrate; cupules bowl-shaped, outside grayish brown tomentose		60 Cyclobalanopsis longinux
101 (86)	Leaf blade abaxially with stellate or furcate hairs.		(102)
+	Leaf blade abaxially with simple hairs or glabrous.		(107)
102 (101)	Cupules discoid or saucer-shaped, 2-3 cm in diam.		(103)
+	Cupules cupular, 1-1.8(-20) cm in diam.		(104)
103 (102)	Cupules discoid, 2-2.5 cm in diam.; nuts oblate		26 Cyclobalanopsis kerrii
+	Cupules saucer-shaped, ca. 3 cm in diam.; nuts ovoid-conical		58 Cyclobalanopsis yingjiangensis
104 (102)	Leaf blade margin glandular serrate		45 Cyclobalanopsis ningangensis
+	Leaf blade margin remotely minutely serrate to serrate.		(105)
105 (104)	Leaf blade secondary veins 9-14 on each side of midvein, midvein flat, margin remotely minutely serrate		44 Cyclobalanopsis argyrotricha
+	Leaf blade secondary veins 16-24 on each side of midvein, midvein impressed, margin serrate.		(106)
106 (105)	Leaf blade abaxially densely pale brown stellate tomentose; nuts hairy, glabrescent		28 Cyclobalanopsis gambleana
+	Leaf blade abaxially pruinose to whitish farinose and with adnate simple and furcate hairs.but soon glabrescent; nuts glabrous or rarely pilose at apex		29 Cyclobalanopsis oxyodon
107 (101)	Nuts ovoid to ellipsoid.		(108)
+	Nuts oblate.		(113)
108 (107)	Leaf blade base ± truncate to somewhat auriculate		32 Cyclobalanopsis yonganensis
+	Leaf blade base cuneate to subrounded.		(109)
109 (108)	Cupules 2-3 cm in diam., covering only base of nut		36 Cyclobalanopsis blakei
+	Cupules 1-1.5 cm in diam., covering 1/3-1/2 of nut.		(110)
110 (109)	Cupules outside puberulent or velutinous.		(111)
+	Cupules outside tomentose.		(112)
111 (110)	Cupules outside puberulent, bract margins subentire; nuts ca. 1 cm in diam.		31 Cyclobalanopsis multinervis
+	Cupules outside velutinous, bract margins dentate; nuts ca. 1.5 cm in diam.		47 Cyclobalanopsis stenophylloides
112 (110)	Cupules 1-1.3 cm in diam.; nuts ellipsoid, ca. 1 cm in diam.		48 Cyclobalanopsis gracilis
+	Cupules ca. 1.5 cm in diam.; nuts broadly ovoid to oblate, 1.2-2 cm in diam.		50 Cyclobalanopsis lungmaiensis
113 (107)	Cupules covering only base of nut.		(114)
+	Cupules covering 1/3 to nearly all nut.		(115)
114 (113)	Petiole glabrous when young; leaf blade secondary veins 15-20 on each side of midvein		42 Cyclobalanopsis chapensis
+	Petiole tomentose when young; leaf blade secondary veins 11-13 on each side of midvein		53 Cyclobalanopsis disciformis
115 (113)	Leaf blade midvein impressed		50 Cyclobalanopsis lungmaiensis
+	Leaf blade midvein raised to slightly so.		(116)
116 (115)	Cupules 1.5-1.8 cm in diam.; nuts 1.3-1.8 cm in diam., scar ca. 1.2 cm in diam.		54 Cyclobalanopsis austrocochinchinensis
+	Cupules ca. 3 cm in diam.; nuts 2.5-3 cm in diam., scar 1.8-2 cm in diam.		(117)
117 (116)	Leaf blade secondary veins 13-16 on each side of midvein; fruit maturing during current year		40 Cyclobalanopsis thorelii
+	Leaf blade secondary veins 17-22 on each side of midvein; fruit maturing on 1-year-old branchlets		55 Cyclobalanopsis subhinoidea