1	Inflorescence a panicle		47 Ophiopogon paniculatus
+	Inflorescence a raceme or reduced panicle.		(2)
2 (1)	Stem elongate, not rhizomelike, with spaced nodes; leaves in distant tufts (rarely in a single, subterminal tuft) or laxly scattered.		(3)
+	Stem indistinct or rhizomelike, with dense nodes; leaves somewhat crowded, densely scattered, or tufted.		(18)
3 (2)	Leaves laxly scattered.		(4)
+	Leaves in distant tufts, rarely in a single, subterminal tuft.		(5)
4 (3)	Raceme 5--10-flowered; bracts white, basal one ca. 6 mm; pedicels articulate proximally; tepals white or purplish, ca. 5 mm		14 Ophiopogon chingii
+	Raceme ca. 60-flowered; bracts pale green, basal one ca. 6 cm; pedicels articulate distally; tepals salmon pink, ca. 3.5 mm		15 Ophiopogon filipes
5 (3)	Stem with a single, subterminal tuft of leaves		23 Ophiopogon hongjiangensis
+	Stem with distant tufts of leaves.		(6)
6 (5)	Leaves distinctly petiolate.		(7)
+	Leaves basally attenuate, indistinctly petiolate or subsessile.		(11)
7 (6)	At least some flowers in clusters of 2 or 3		2 Ophiopogon dracaenoides
+	Flowers all solitary.		(8)
8 (7)	Anthers 2--4 mm, much shorter than tepals.		(9)
+	Anthers 6--7 mm, slightly shorter than or nearly as long as tepals.		(10)
9 (8)	Stem covered with purple-brown or deep brown sheaths; leaf blade 15--30 mm wide		1 Ophiopogon sarmentosus
+	Stem covered with greenish to grayish sheaths; leaf blade 4--8 mm wide		5 Ophiopogon sylvicola
10 (8)	Anthers free; tepals spreading		3 Ophiopogon tienensis
+	Anthers connate; tepals revolute		4 Ophiopogon heterandrus
11 (6)	Inflorescence densely 110--180-flowered; anthers connate, ca. 1/2 as long as style		8 Ophiopogon multiflorus
+	Inflorescence laxly several to 60-flowered; anthers free, slightly shorter than or equaling style.		(12)
12 (11)	Bracts nearly as long as pedicels.		(13)
+	Bracts much longer than pedicels.		(15)
13 (12)	Leaves 3--4 mm wide; pedicels articulate near middle		7 Ophiopogon reptans
+	Leaves 7--16 mm wide; pedicels articulate proximally.		(14)
14 (13)	Scape and inflorescence (20--)30--45 cm; bracts linear-lanceolate		10 Ophiopogon motouensis
+	Scape and inflorescence ca. 12 cm; bracts ovate to ovate-lanceolate		11 Ophiopogon menglianensis
15 (12)	Tepals white, 7.5--9 mm		6 Ophiopogon yunnanensis
+	Tepals purplish, 2.5--7 mm.		(16)
16 (15)	Tepals ca. 2.5 mm; pedicel 2--3 mm		9 Ophiopogon tsaii
+	Tepals 4.8--7 mm; pedicel 6--9 mm.		(17)
17 (16)	Plants to 70 cm tall; tepals 4.8--5 mm		12 Ophiopogon jiangchengensis
+	Plants less than 40 cm tall; tepals ca. 7 mm		13 Ophiopogon albimarginatus
18 (2)	Stem rhizomelike, with dense nodes; leaves subterminal, somewhat crowded or densely arranged.		(19)
+	Stem indistinct; leaves basal or nearly so, tufted.		(30)
19 (18)	Plants stoloniferous.		(20)
+	Plants not stoloniferous.		(21)
20 (19)	Anthers free; leaves 8--24 mm wide; pedicel 3--4 mm		16 Ophiopogon amblyphyllus
+	Anthers connate; leaves 3--7 mm wide; pedicel 8--10 mm		17 Ophiopogon angustifoliatus
21 (19)	Roots somewhat stiltlike, straight, 3--5 mm thick, stiff, ± woody, glabrescent.		(22)
+	Roots not stiltlike, 1--2.5 mm thick, soft, not woody, usually densely hairy.		(24)
22 (21)	Leaves 4--6 mm wide; pedicel shorter than tepals		18 Ophiopogon fooningensis
+	Leaves at least partly more than 10 mm wide; pedicel longer than tepals.		(23)
23 (22)	Pedicel much longer than bracts, articulate proximally; inflorescence 5--6 cm		19 Ophiopogon platyphyllus
+	Pedicel shorter than or equaling bracts, articulate distally; inflorescence 10--20 cm		20 Ophiopogon latifolius
24 (21)	Anthers free.		(25)
+	Anthers connate.		(27)
25 (24)	Leaves 2--3 mm wide; flowers solitary		27 Ophiopogon lushuiensis
+	Leaves (4--)7--14 mm wide; at least some flowers paired.		(26)
26 (25)	Bract at base of inflorescence 2--4 cm; style ca. 7 mm		21 Ophiopogon grandis
+	Bract at base of inflorescence 5--7 mm; style ca. 2.5 mm		22 Ophiopogon mairei
27 (24)	Anthers 6.5--7 mm; flowers all solitary		28 Ophiopogon szechuanensis
+	Anthers 2.5--3(--4.5) mm; at least some flowers paired.		(28)
28 (27)	Bract at base of inflorescence much shorter than pedicels		26 Ophiopogon sinensis
+	Bract at base of inflorescence nearly as long as or much longer than pedicels.		(29)
29 (28)	Filaments ca. 1 mm; bract at base of inflorescence nearly as long as pedicels		24 Ophiopogon stenophyllus
+	Filaments indistinct; bract at base of inflorescence much longer than pedicels		25 Ophiopogon bockianus
30 (18)	Leaves oblong to oblanceolate, distinctly petiolate.		(31)
+	Leaves grasslike or linear, indistinctly petiolate or sessile.		(37)
31 (30)	Plants stoloniferous; filaments ca. 2 mm; pedicel articulate near apex		30 Ophiopogon clavatus
+	Plants not stoloniferous; filaments less than 1 mm; pedicel articulate proximally or near middle.		(32)
32 (31)	Leaves with pinnate-parallel venation, 4(--6) lateral veins running from midvein, margin ± wrinkled		29 Ophiopogon peliosanthoides
+	Leaves with parallel venation, veins running from base, margin not wrinkled.		(33)
33 (32)	Roots somewhat stiltlike, straight, 3--5 mm thick, stiff, ± woody, not hairy		35 Ophiopogon xylorrhizus
+	Roots not stiltlike, 1--2 mm thick, soft, not woody, usually hairy.		(34)
34 (33)	Inflorescence a raceme, several flowered; flowers solitary; tepals 8--11 mm; anthers ca. 6 mm		31 Ophiopogon pingbienensis
+	Inflorescence a reduced panicle, 10--35-flowered; at least some flowers in clusters of 2 or 3; tepals 4--8 mm; anthers 3--4 mm.		(35)
35 (34)	Tepals oblong-lanceolate, ca. 8 mm; style ca. 8 mm		34 Ophiopogon marmoratus
+	Tepals ovate to oblong, 4--5 mm; style 3.5--5 mm.		(36)
36 (35)	Tepals reflexed distally, white; anthers connate; leaves 1--2.2 cm wide, papery		33 Ophiopogon pseudotonkinensis
+	Tepals erect, purplish; anthers free; leaves 2.5--3.5(--4.2) cm wide, leathery		32 Ophiopogon tonkinensis
37 (30)	Plants stoloniferous.		(38)
+	Plants not stoloniferous.		(40)
38 (37)	Tepals 7--8 mm; filaments distinct, ca. 1.5 mm, ca. 1/3 as long as anthers		46 Ophiopogon clarkei
+	Tepals 4--6 mm; filaments very short or indistinct.		(39)
39 (38)	Style terete, slender, basally not widened; tepals ± spreading; scape and inflorescence usually slightly shorter than leaves		44 Ophiopogon bodinieri
+	Style somewhat narrowly conical, moderately thick, basally widened; tepals scarcely spreading; scape and inflorescence usually much shorter than leaves		45 Ophiopogon japonicus
40 (37)	Rhizome gingerlike, ca. 3 cm thick, fleshy		36 Ophiopogon zingiberaceus
+	Rhizome not gingerlike, much thinner.		(41)
41 (40)	Leaves 1--1.5 mm wide		43 Ophiopogon umbraticola
+	Leaves (2--)3--25 mm wide.		(42)
42 (41)	Plants basally ± purple-brown; roots yellow-brown hairy; bracts at middle of inflorescence more than 1 cm		37 Ophiopogon megalanthus
+	Plants basally not purple-brown; roots whitish hairy; bracts at middle of inflorescence less than 1 cm.		(43)
43 (42)	Anthers 3--4 mm, ca. 1/2 as long as tepals.		(44)
+	Anthers 7--8 mm, ca. 2/3 as long as or equaling tepals.		(45)
44 (43)	Style basally widened, without a clear line of demarcation between ovary and style		42 Ophiopogon reversus
+	Style not basally widened, terete, with a clear line of demarcation between ovary and style		41 Ophiopogon intermedius
45 (43)	Filaments very short or indistinct; tepals revolute; pedicels articulate near base		38 Ophiopogon revolutus
+	Filaments distinct, 1--2 mm; tepals spreading; pedicels articulate near or above middle.		(46)
46 (45)	Leaves 10--15 mm wide, white streaked abaxially; flowers in clusters of 2--4; anthers free		39 Ophiopogon corifolius
+	Leaves 4--7(--9) mm wide, not streaked abaxially; flowers solitary; anthers initially connate, later free		40 Ophiopogon sparsiflorus