1	Cymes in very short panicles, axillary or terminal; anther connective not elongated or projecting.		(2)
+	Cymes fascicled in leaf axils; anther connective usually elongated or projecting.		(4)
2 (1)	Leaf blade thick leathery, broadly elliptic to narrowly lanceolate, base cuneate or broadly so; inflorescences compact		1 Osmanthus marginatus
+	Leaf blade papery or leathery, narrowly elliptic, oblanceolate, to narrowly obovate, base attenuate; inflorescences loose.		(3)
3 (2)	Leaf blade oblanceolate, rarely obovate or narrowly elliptic, 8-14(-19) × 2.5-4.5(-6) cm, usually serrate in distal half; petiole 1.5-3 cm		2 Osmanthus matsumuranus
+	Leaf blade narrowly elliptic or narrowly obovate, rarely oblanceolate, 4.5-9 × 1.5-3.5 cm, entire; petiole 1-1.5 cm		3 Osmanthus minor
4 (1)	Corolla lobes united in pairs at base, not forming a tube		4 Osmanthus didymopetalus
+	Corolla lobes united at base into a tube.		(5)
5 (4)	Corolla tube much longer than lobes, cylindric.		(6)
+	Corolla tube subequalling or shorter than lobes, if longer, then tube urceolate.		(7)
6 (5)	Leaf blade usually elliptic, 3-7 cm, obtusely serrate at margin		5 Osmanthus suavis
+	Leaf blade oblong, broadly elliptic, or broadly ovate, 1-2.5(-4) cm, sharply serrate at margin		6 Osmanthus delavayi
7 (5)	Branchlets, petiole, and adaxial surface of midrib ± hairy.		(8)
+	Branchlets, petiole, and midrib usually glabrous.		(15)
8 (7)	Pedicel puberulent		7 Osmanthus pubipedicellatus
+	Pedicel glabrous.		(9)
9 (8)	Corolla lobes longer than or rarely equal to tube.		(10)
+	Corolla lobes subequalling or rarely shorter than tube.		(11)
10 (9)	Leaf blade oblong-elliptic or elliptic, usually with 3 or 4 pairs of spiny teeth; stamens attached to base of corolla tube		8 Osmanthus heterophyllus
+	Leaf blade elliptic to oblanceolate, entire or if serrate, then with ca. 20 pairs of dentate-serrate teeth on each side; stamens attached to middle of corolla tube		9 Osmanthus henryi
11 (9)	Corolla urceolate, lobes shorter than tube		10 Osmanthus urceolatus
+	Corolla not urceolate, lobes almost as long as tube.		(12)
12 (11)	Leaf blade dentate or serrate, if entire then veins obviously raised and reticulate.		(13)
+	Leaf blade entire.		(14)
13 (12)	Petiole 2-5 mm; leaf blade usually with 6-10(-17) pairs of spiny teeth, base ± rounded to subcordate, rarely broadly cuneate		11 Osmanthus armatus
+	Petiole 10-15 mm; leaf blade entire or with 3 or 4 pairs of serrations, base cuneate to blunt		12 Osmanthus venosus
14 (12)	Leaf blade elliptic or obovate, ca. 2 × as long as broad, base broadly cuneate to rounded		13 Osmanthus cooperi
+	Leaf blade narrowly elliptic to lanceolate, ca. 4 × as long as broad, base narrowly cuneate		14 Osmanthus attenuatus
15 (7)	Bracts hairy or at least ciliate.		(16)
+	Bracts glabrous.		(18)
16 (15)	Leaf venation neither reticulate nor raised; bracts hirsute		17 Osmanthus enervius
+	Leaf venation reticulate or distinctly raised; bracts ciliate.		(17)
17 (16)	Leaf blade usually ovate-lanceolate or elliptic, serrulations (when present) 2-3 mm		15 Osmanthus yunnanensis
+	Leaf blade obovate-lanceolate or obovate-elliptic to elliptic, serrulations (when present) 1 mm		16 Osmanthus serrulatus
18 (15)	Calyx less than 1 mm; leaf blade less than 6 cm		18 Osmanthus fordii
+	Calyx ca. 1 mm; leaf blade usually more than 6 cm.		(19)
19 (18)	Corolla lobes more than 2 × as long as tube; leaf veins not reticulate, primary veins impressed adaxially		19 Osmanthus fragrans
+	Corolla lobes subequal to ca. 2 × as long as tube.		(20)
20 (19)	Leaf venation neither reticulate nor raised, blade elliptic or narrowly so		20 Osmanthus gracilinervis
+	Leaf venation reticulate or raised, blade elliptic to lanceolate or narrowly ovate.		(21)
21 (20)	Leaf blade lanceolate; stamens attached to distal part of corolla tube		21 Osmanthus lanceolatus
+	Leaf blade narrowly ovate, elliptic, oblong, or oblanceolate; stamens attached to middle or basal part of corolla tube.		(22)
22 (21)	Stamens attached to middle of corolla tube; leaf venation reticulate, veins obvious and raised		22 Osmanthus reticulatus
+	Stamens attached to basal part of corolla tube; leaf venation obscure, reticulate but primary veins raised		23 Osmanthus hainanensis