1	Petals imbricate, usually broadly ovate, obovate, or orbicular.		(2)
+	Petals induplicate or valvate, oblong or ovate-oblong, rarely obovate.		(10)
2 (1)	Filaments subulate, toothless or only inner ones dentate; petals white, rarely pink.		(3)
+	Outer filaments dentate, inner ones variable, usually apex acuminate or 2-lobed; petals pink, rarely white.		(5)
3 (2)	Plants glabrous, except bud scales and leaf blades sometimes stellate hairy adaxially		1 D. glabrata
+	Plants ± stellate hairy.		(4)
4 (3)	Leaf blade adaxially 5(or 6)-rayed stellate hairy, abaxially 6-12-rayed stellate hairy; filaments subulate, toothless or only inner 2 dentate; petals white		2 D. parviflora
+	Leaf blade adaxially 4- or 5(or 6)-rayed stellate hairy, abaxially 5-8-rayed stellate hairy, central rays usually long; filaments subulate, toothless; petals pink		3 D. mollis
5 (2)	Teeth of outer filaments subequaling or longer than anther stalks; inflorescences 5-15(-21)-flowered; stellate hairs of inflorescences and leaf blade veins without papilliform base.		(6)
+	Teeth of outer filaments shorter than anther stalks; inflorescences 15-80-flowered; stellate hairs of inflorescences and leaf blade veins with papilliform base.		(8)
6 (5)	Leaf blade abaxially glaucous, glabrous or 3-5-rayed stellate hairy; petals white or pinkish at apex; branchlets and inflorescences glabrous		4 D. hypoglauca
+	Leaf blade abaxially greenish, 5- or 6(or 7)-rayed stellate hairy; petals pink; branchlets and inflorescences stellate hairy.		(7)
7 (6)	Pedicel slender, 1-2 cm; inflorescences 5-10-flowered; leaf blade oblong or ovate-oblong, rarely lanceolate, apex acute; flowering branchlets usually 4-leaved		5 D. rubens
+	Pedicel robust, 8-12 mm; inflorescences 11-21-flowered; leaf blade ovate-lanceolate or elliptic-lanceolate, apex acuminate; flowering branchlets usually 6-leaved		6 D. muliensis
8 (5)	Outer anther stalks ca. 2 mm, ca. 1/2 as long as filaments; inner anther stalks borne between filament teeth		9 D. bomiensis
+	Outer anther stalks 1-1.5 mm, less than 1/2 as long as filaments; inner anther stalks borne at middle of filaments abaxially.		(9)
9 (8)	Leaf blade abaxially sparsely 6-8-rayed stellate hairy, hairs of 2 types (minute and larger ones)		7 D. compacta
+	Leaf blade abaxially densely 8-10(-15)-rayed stellate hairy, hairs uniform		8 D. hookeriana
10 (1)	Filaments all 2-dentate at apex, teeth not reaching anthers or, if longer, horizontal or recurved, falcate; anthers borne between filament teeth.		(11)
+	Only outer filaments 2-dentate at apex, teeth ± level with or exceeding anthers, rarely shorter; inner filaments not 2-dentate at apex; anthers borne at middle or near apex of filaments abaxially.		(22)
11 (10)	Flowering branchlets to 4 cm; inflorescences 1-3(-5)-flowered; filament teeth horizontal or recurved, falcate, exceeding anthers.		(12)
+	Flowering branchlets more than 4 cm; inflorescences more than 5-flowered; filament teeth not reaching anthers.		(13)
12 (11)	Leaf blade abaxially densely 7-11-rayed stellate hairy, indumentum continuous		20 D. grandiflora
+	Leaf blade abaxially sparsely 5- or 6(or 7)-rayed stellate hairy, indumentum discontinuous		21 D. baroniana
13 (11)	Inflorescences cymose; calyx lobes subequaling or longer than tube, rarely shorter.		(14)
+	Inflorescences paniculate, racemose, or cymose paniculate; calyx lobes ca. 1/2 as long as calyx tube.		(15)
14 (13)	Leaf blade abaxially greenish gray, elliptic-lanceolate or oblong-lanceolate, 5-10 × 2-3 cm; filament teeth acute at apex		18 D. discolor
+	Leaf blade abaxially gray, ovate or elliptic-ovate, 3-5 × 1.5-2 cm; filaments teeth obtuse at apex		19 D. silvestrii
15 (13)	Leaf blade adaxially 3- or 4-rayed stellate hairy, abaxially 4- or 5(or 6)-rayed stellate hairy.		(16)
+	Leaf blade adaxially 4- or 5(-7)-rayed stellate hairy, abaxially 10-22-rayed stellate hairy, rarely glabrous on both surfaces or only abaxially sparsely stellate hairy.		(18)
16 (15)	Inflorescences slender, racemose or narrowly paniculate, glabrous; calyx sparsely hairy; filaments 2-dentate at apex or outer ones toothless		10 D. gracilis
+	Inflorescences robust, cymose paniculate, hairy; calyx densely hairy; filaments all 2-dentate at apex.		(17)
17 (16)	Petiole less than 2 mm on flowering branchlets or almost absent; hairs on leaf blade veins with long central rays and papilliform base		11 D. faberi
+	Petiole 2-4 mm on flowering branchlets; hairs on leaf blade veins with neither long central rays nor papilliform base		12 D. taiwanensis
18 (15)	Flowering branchlets glabrous; leaf blade abaxially glabrous, or if hairy then rather sparsely so		13 D. glauca
+	Flowering branchlets stellate hairy; leaf blade hairy on both surfaces, abaxially more densely so.		(19)
19 (18)	Leaf blade abaxially grayish green, densely stellate hairy, indumentum continuous.		(20)
+	Leaf blade abaxially green, sparsely stellate hairy, indumentum discontinuous.		(21)
20 (19)	Petiole 5-15 mm on flowering branchlets; leaf blade adaxially 6-12-rayed stellate hairy; petals 10-12 mm; capsule 6-7 mm in diam.		14 D. pulchra
+	Petiole 1-2 mm on flowering branchlets; leaf blade adaxially 4-7(or 8)-rayed stellate hairy; petals 5-8 mm; capsule 4-5 mm in diam.		15 D. ningpoensis
21 (19)	Calyx yellowish brown stellate hairy; calyx tube ca. 2.5 × 2 mm, lobes ovate		16 D. crenata
+	Calyx grayish green stellate hairy; calyx tube ca. 3 × 4 mm, lobes deltoid		17 D. schneideriana
22 (10)	Capsule globose or subglobose, with persistent, incurved calyx lobes.		(23)
+	Capsule hemispheric, rarely obconical or campanulate, with persistent, erect, rarely recurved calyx lobes.		(30)
23 (22)	Leaf blade adaxially reticulate rugose when dry		44 D. crassifolia
+	Leaf blade adaxially not rugose when dry.		(24)
24 (23)	Leaf blade abaxially grayish, densely 8-16-rayed stellate hairy, indumentum continuous		45 D. multiradiata
+	Leaf blade abaxially greenish or grayish green, sparsely 5-9(or 10)-rayed stellate hairy, indumentum discontinuous.		(25)
25 (24)	Leaf blade glossy, leathery, margin thorny serrate		46 D. coriacea
+	Leaf blade not glossy, papery or membranous, margin serrulate.		(26)
26 (25)	Stellate hairs of branchlets and leaf blades with long central rays; calyx lobes ovate or ovate-lanceolate; petiole 1-3 mm		47 D. pilosa
+	Stellate hairs of branchlets and leaf blades without long central rays, except those on leaf blade veins; calyx lobes deltoid or ovate deltoid; petiole 3-5 mm.		(27)
27 (26)	Leaf blade narrowly lanceolate, 2.5-4.5 × 0.4-0.6(-1.2) cm, base rounded		48 D. esquirolii
+	Leaf blade ovate, ovate-oblong, or -lanceolate, 3-7(-12) × 1.5-3 cm, base rounded or broadly cuneate.		(28)
28 (27)	Stellate hairs of abaxial leaf surface with papilliform base		50 D. setchuenensis
+	Stellate hairs of abaxial leaf surface without papilliform base.		(29)
29 (28)	Leaf blade abaxially densely grayish green stellate hairy, reticulate veins conspicuously elevated; petals 3-4.5 mm		49 D. cinerascens
+	Leaf blade abaxially sparsely yellow-green or greenish stellate hairy, reticulate veins inconspicuous; petals 5-12 mm		50 D. setchuenensis
30 (22)	Calyx lobes shorter than tube.		(31)
+	Calyx lobes subequaling or longer than tube.		(40)
31 (30)	Inflorescences 3-5(-11)-flowered; leaf blade abaxially greenish, sparsely 5-8(-10)-rayed stellate hairy.		(32)
+	Inflorescences 6-25-flowered; leaf blade abaxially grayish green, densely 8-14-rayed stellate hairy.		(33)
32 (31)	Inflorescences corymbose cymes, pedicels 1-2 cm; teeth of outer filaments exceeding anthers		23 D. cymuligera
+	Inflorescences cymes, pedicels 3-5 mm; teeth of outer filaments ± level with anthers		22 D. rehderiana
33 (31)	Styles slightly longer than stamens; inner anthers borne near apex of filaments abaxially.		(34)
+	Styles shorter than or subequaling stamens; inner anthers borne at middle of filaments abaxially, rarely between teeth.		(36)
34 (33)	Petals pink; calyx tube 3.5-4 × 4-4.5 mm, lobes deltoid or broadly ovate; styles 4(or 5)		31 D. wardiana
+	Petals white; calyx tube ca. 3 × 2.5 mm, lobes ovate or ovate-oblong; styles 3(or 4).		(35)
35 (34)	Capsule hemispheric, persistent calyx lobes erect; margin of leaf blade regularly serrulate		29 D. staminea
+	Capsule obconical or obcampanulate, persistent calyx lobes recurved; margin of leaf blade alternately coarsely serrate and serrulate		30 D. crassidentata
36 (33)	Leaves dimorphic, suborbicular on basal flowering branchlets; petals 13-14 mm		28 D. heterophylla
+	Leaves monomorphic, not suborbicular on basal flowering branchlets; petals 6-12 mm.		(37)
37 (36)	Leaf blade subleathery; petals narrowly elliptic, obovate-oblong, or oblong, ca. 3 × as long as wide.		(38)
+	Leaf blade papery; petals broadly elliptic or obovate, ca. 2 × as long as wide.		(39)
38 (37)	Apex of outer filaments shouldered, subrounded, or 2-lobed with lobes not reaching anthers		24 D. obtusilobata
+	Apex of outer filaments 2-dentate, teeth oblong, ± level with anthers		25 D. monbeigii
39 (37)	Petals 10-12 × 5-6 mm; stellate hairs of leaf blade with long central rays		26 D. yunnanensis
+	Petals ca. 8 × 4 mm; stellate hairs leaf of blade without long central rays		27 D. breviloba
40 (30)	Styles shorter than inner stamens; petals 4.5-7 mm.		(41)
+	Styles subequaling or longer than stamens; petals more than 7 mm.		(42)
41 (40)	Leaf blade abaxially gray-white, densely stellate hairy, indumentum continuous; calyx lobes narrowly lanceolate, base less than 1 mm wide		32 D. albida
+	Leaf blade abaxially greenish, sparsely stellate hairy, indumentum discontinuous; calyx lobes lanceolate, base ca. 1 mm wide		33 D. taibaiensis
42 (40)	Stellate hairs of branchlets and inflorescences with papilliform base.		(43)
+	Stellate hairs of branchlets and inflorescences without papilliform base.		(44)
43 (42)	Leaf blade 3-10 × 1.5-3 cm, abaxially 5-9(-11)-rayed stellate hairy, indumentum discontinuous; calyx lobes subequaling tube, leathery		34 D. aspera
+	Leaf blade 1-2.5 × 0.7-1.4 cm, abaxially densely stellate hairy, indumentum continuous; calyx lobes longer than tube, membranous		35 D. glaucophylla
44 (42)	Leaf blade 2-5(-8) × 0.6-2 cm; inflorescences 3-4(-5) cm in diam.		(45)
+	Leaf blade (3-)5-12(-15) × (1-)1.5-3 cm; inflorescences 4.5-8 cm in diam.		(46)
45 (44)	Calyx lobes lanceolate, membranous; leaf blade abaxially greenish, indumentum discontinuous		36 D. glomeruliflora
+	Calyx lobes subulate, subleathery; leaf blade abaxially grayish green, indumentum continuous		37 D. subulata
46 (44)	Calyx lobes 5-8 mm, ca. 2 × as long as tube, membranous		43 D. calycosa
+	Calyx lobes 2.5-5 mm, subequaling or slightly longer than tube, leathery.		(47)
47 (46)	Leaf blade papery or thinly leathery, abaxially sparsely stellate hairy.		(48)
+	Leaf blade leathery, abaxially densely stellate hairy.		(49)
48 (47)	Leaf blade oblong-lanceolate or lanceolate, adaxially 4-6-rayed stellate hairy, abaxially yellowish brown, 7-9(-13)-rayed stellate hairy, indumentum appressed		41 D. nanchuanensis
+	Leaf blade broadly ovate-lanceolate or ovate-oblong, adaxially 4- or 5-rayed stellate hairy, abaxially greenish, 4-8(-10)-rayed stellate hairy, indumentum not appressed		42 D. purpurascens
49 (47)	Leaf blade ovate; flowering branchlets 18-22 cm; petals white		40 D. zhongdianensis
+	Leaf blade lanceolate or elliptic-lanceolate; flowering branchlets 5-15 cm; petals purplish.		(50)
50 (49)	Leaf blade adaxially 4-6(or 7)-rayed stellate hairy, abaxially 8-12-rayed stellate hairy, hairs along veins with long central rays		38 D. longifolia
+	Leaf blade adaxially 6-8-rayed stellate hairy, abaxially 12-16-rayed stellate hairy, hairs without long central rays		39 D. squamosa