1	Branchlet apex hirsute, hirtellous, puberulent, pilose, velutinous, or brown scaly.		(2)
+	Branchlet apex glabrous or glandular granulose, early glabrescent.		(16)
2 (1)	Branchlets brown scaly.		(3)
+	Branchlets white pilose-tomentulose or brown velutinous tomentulose, hirsute, or hirtellous and reddish glandular granulose.		(4)
3 (2)	Leaf blade leathery, rugose, apex cuspidate-acuminate, acumen 4-6 mm; petiole thick, 2-3.5 cm		1 Maesa rugosa
+	Leaf blade papery, not rugose, apex caudate-acuminate, acumen 8-20 mm, petiole thin, 0.7-1.5 cm		2 Maesa chisia
4 (2)	Branchlets white pilose-tomentulose or brown velutinous-tomentulose.		(5)
+	Branchlets hirsute or stramineous hirtellous and reddish glandular granulose.		(9)
5 (4)	Branchlets white pilose-tomentulose.		(6)
+	Branchlets brown velutinous-tomentulose.		(7)
6 (5)	Leaf blade leathery, secondary veins connected by submarginal vein		3 Maesa cavinervis
+	Leaf blade membranous, secondary veins free to margin, without submarginal vein		4 Maesa montana
7 (5)	Leaf blade linear-lanceolate; calyx lobes densely dull red punctate and punctate-lineate		5 Maesa macilentoides
+	Leaf blade lanceolate to ovate; calyx lobes puberulent or inconspicuously pellucid.		(8)
8 (7)	Inflorescences punctate 5-8 mm; leaf base obtuse		6 Maesa brevipaniculata
+	Inflorescences (10-)20-40 mm; leaf blade base truncate to cordate		7 Maesa macilenta
9 (4)	Plants hirsute.		(10)
+	Plants hirtellous and glandular granulose.		(13)
10 (9)	Petiole 1.2-2.5 cm; pith hollow.		(11)
+	Petiole 0.4-1(-1.2) cm; pith solid.		(12)
11 (10)	Plants gray hirsute; branchlets terete; inflorescences racemose, ca. 6 cm; leaf blade apex caudate-acuminate, margin serrate, teeth not callose		8 Maesa insignis
+	Plants reddish hirsute; branchlets angular; inflorescences glomerate or paniculate, rarely to 4 cm; leaf blade apex cuspidate, margin serrate or dentate, teeth callose		9 Maesa permollis
12 (10)	Inflorescences racemose, 0.4-1 cm; leaf blade oblanceolate		10 Maesa ambigua
+	Inflorescences few-branched panicles, 3-7 cm; leaf blade lanceolate		11 Maesa longilanceolata
13 (9)	Petiole 0.4-1 cm; leaf blade base obtuse to rounded.		(14)
+	Petiole 1-2(-3) cm; leaf blade base acute.		(15)
14 (13)	Calyx lobes acuminate; pedicel 1.5-2 mm		12 Maesa parvifolia
+	Calyx lobes acute; pedicel 1.2-1.5 mm		13 Maesa marioniae
15 (13)	Inflorescences racemose-spicate; pedicel obsolete to 0.8 mm; calyx conic		14 Maesa argentea
+	Inflorescences paniculate or rarely racemose; pedicel 1.8-2 mm; calyx discoid		15 Maesa perlarius
16 (1)	Branchlet apex glabrous.		(17)
+	Branchlet apex glandular granulose, early glabrescent.		(19)
17 (16)	Leaf blade leathery, apex cuspidate; inflorescences glomerate, shorter than petiole		16 Maesa reticulata
+	Leaf blade membranous or papery, apex caudate-acuminate; inflorescences paniculate, longer than petiole.		(18)
18 (17)	Leaf blade membranous, adaxially dull, abaxially and hypanthium densely black punctate-lineate; inflorescence rachis and pedicels densely and minutely glandular granulose		17 Maesa striatocarpa
+	Leaf blade papery, adaxially glossy, abaxially and hypanthium inconspicuously pellucid punctate; inflorescence rachis and pedicels glabrous and glossy		18 Maesa acuminatissima
19 (16)	Leaf blade margin undulate, subentire, or entire.		(20)
+	Leaf blade margin serrate or serrate-dentate.		(24)
20 (19)	Leaf blade membranous or papery; pedicel 1-2 mm.		(21)
+	Leaf blade leathery or rarely papery; pedicel 2.5-4 mm.		(22)
21 (20)	Branchlets terete, lenticellate; calyx lobes densely punctate-lineate; bracts and bracteoles wider than long; inflorescence rachis and pedicels glabrous		22 Maesa consanguinea
+	Branchlets angular, without lenticels; calyx lobes punctate; bracts and bracteoles longer than wide; inflorescence rachis and pedicels minutely glandular granulose		23 Maesa ramentacea
22 (20)	Leaves prominently black punctate-lineate; bracts subulate, bracteoles and calyx lobes longer than wide, apery, apex acute		21 Maesa hupehensis
+	Leaves inconspicuously pellucid punctate; bracts, bracteoles, and calyx lobes much wider than long, leathery, apex obtuse to rounded.		(23)
23 (22)	Leaf blade linear-lanceolate, bullate, margin revolute, entire; fruit reddish, punctate-lineate, wrinkled		19 Maesa salicifolia
+	Leaf blade lanceolate, oblong, or rarely ovate, smooth, flat, margin subentire to serrate distally; fruit yellowish, smooth		20 Maesa japonica
24 (19)	Petiole 2-4 cm.		(25)
+	Petiole 1-1.8 cm.		(26)
25 (24)	Inflorescences densely and minutely glandular granulose; pedicel 2-2.5 mm at maturity; branchlets sparingly lenticellate; leaves membranous, adaxially dull		24 Maesa confusa
+	Inflorescences glabrous; pedicel 0.8-1.5(-2) mm at maturity; branchlets without lenticels; leaves thin leathery, adaxially glossy		25 Maesa membranacea
26 (24)	Calyx lobe and bracteoles obtuse to rounded apically; inflorescence rachis and pedicels densely and minutely glandular granulose		26 Maesa indica
+	Calyx lobe and bracteoles acute apically; inflorescence rachis and pedicels glabrous.		(27)
27 (26)	Leaf blade membranous, elliptic to ovate, margin serrate, teeth not callose; inflorescences 7-10 cm, racemose		27 Maesa tenera
+	Leaf blade papery, oblong to oblanceolate, margin serrate-dentate, teeth callose; inflorescences 1.5-4 cm, paniculate.		(28)
28 (27)	Branchlets with hollow pith; leaf base subrounded or obtuse; bracteole and calyx lobe margins glandular ciliate; fruit ovoid		28 Maesa manipurensis