| 1 |
Flowers large, more than 1 cm in diam.; disk large, 7-8 mm in diam., usually 3-12 ovules per cell |
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(2) |
| + |
Flowers small, less than 1 cm in diam.; disk small, 2-5 mm in diam., usually 2 ovules per cell |
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(6) |
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| 2 (1) |
Flowers and fruit 5-merous |
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(3) |
| + |
Flowers and fruit 4-merous |
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(4) |
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| 3 (2) |
Petals with obvious black or purple veins toward margin; leaf blade elliptic, less than 6 cm; capsule 1.2-1.6 cm. |
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84 E. tingens |
| + |
Petals without black or purple veins; leaf blade linear to lanceolate, or obovate; capsule ca. 2.5 cm. |
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89 E. yunnanensis |
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| 4 (2) |
Capsule with 4 large winglike angles, up to 1 cm. |
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56 E. chengii |
| + |
Capsule without wings, only angular |
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(5) |
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| 5 (4) |
Leaf blade usually long elliptic to oblong, or oblanceolate. |
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62 E. grandiflorus |
| + |
Leaf blade usually ovate to elliptic, or obovate. |
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55 E. carnosus |
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| 6 (1) |
Leaf blade usually small, less than 6(-7) cm; branches and twigs tuberculate or black warty |
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(7) |
| + |
Leaf blade usually large, more than 7 cm; branches and twigs smooth |
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(13) |
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| 7 (6) |
Leaf blade ovate, oblong, elliptic, or lanceolate, usually more than 1 cm wide |
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(8) |
| + |
Leaf blade linear, oblong-linear, linear-elliptic, or linear-lanceolate, usually less than 1 cm wide |
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(10) |
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| 8 (7) |
Branches and twigs with tubercle or black warts; capsule subglobose. |
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86 E. verrucosus |
| + |
Branches and twigs without tubercle or black warts; capsule oblong or pear-shaped |
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(9) |
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| 9 (8) |
Leaf blade thickly leathery, rotund-oblong; capsule wider than long. |
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76 E. percoriaceus |
| + |
Leaf blade papery, lanceolate; capsule longer than wide, pear-shaped. |
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80 E. semenovii |
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| 10 (7) |
Branches and twigs terete; flowers pale yellow. |
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83 E. ternifolius |
| + |
Branches and twigs with 4 corky wings; flowers white-green or greenish yellow |
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(11) |
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| 11 (10) |
Leaf blade linear, 2-4 × ca. 2 mm. |
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68 E. lichiangensis |
| + |
Leaf blade linear-elliptic or linear-lanceolate, 2-7 × 2-20 mm |
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(12) |
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| 12 (11) |
Leaf blade linear-elliptic, 2-4 × 3-10 mm; flowers white-green or greenish yellow. |
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73 E. nanoides |
| + |
Leaf blade linear-lanceolate, 2-7 × 2-20 mm; flowers white-green. |
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72 E. nanus |
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| 13 (6) |
Leaves deciduous |
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(14) |
| + |
Leaves evergreen |
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(20) |
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| 14 (13) |
Flowers and fruit 5-merous. |
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58 E. dolichopus |
| + |
Flowers and fruit 4-merous |
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(15) |
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| 15 (14) |
Young branches with narrow corky wings. |
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77 E. phellomanus |
| + |
Young and old branches without wings |
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(16) |
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| 16 (15) |
Capsule with obscure angles |
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(17) |
| + |
Capsule with strong angles and grooves |
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(18) |
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| 17 (16) |
Capsule apiculate; leaf blade apex acute or acuminate, margin crenate or serrate. |
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64 E. hui |
| + |
Capsule without apiculus; leaf blade apex rounded, margin small crenate. |
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87 E. viburnoides |
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| 18 (16) |
Leaf blade smooth on both surfaces. |
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69 E. maackii |
| + |
Leaf blade rugose on both surfaces |
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(19) |
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| 19 (18) |
Leaf blade 11-13(-15) cm, apex acute or acuminate. |
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63 E. hamiltonianus |
| + |
Leaf blade 9-10 cm, apex rounded. |
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75 E. parasimilis |
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| 20 (13) |
Petals usually fimbriate to denticulate on margin |
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(21) |
| + |
Petals entire |
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(22) |
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| 21 (20) |
Petals pink to red or purple, cymes 15-20 cm. |
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66 E. laxicymosus |
| + |
Petals white to green, fimbriate, cymes up to 8 cm. |
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59 E. gibber |
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| 22 (20) |
Flowers and fruit 5-merous |
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(23) |
| + |
Flowers and fruit 4-merous |
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(28) |
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| 23 (22) |
Leaf blade margin large denticulate; petals red-pink to black-purple, ca. 1 cm in diam.. |
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57 E. chloranthoides |
| + |
Leaf blade margin without large denticles; petals purple, white, cream, or greenish white to green |
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(24) |
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| 24 (23) |
Petals white, cream, or greenish white to green |
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(25) |
| + |
Petals purple |
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(26) |
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| 25 (24) |
Leaf blade long lanceolate, leathery, margin finely remotely serrate. |
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85 E. tsoi |
| + |
Leaf blade ovate, elliptic to oblong, margin distally crenulate, proximally entire. |
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60 E. glaber |
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| 26 (24) |
Leaf blade with serrate margin. |
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81 E. serratifolius |
| + |
Leaf blade entire to crenulate to sparsely denticulate |
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(27) |
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| 27 (26) |
Leaf blade elliptic-obovate or ovate, 6-10 × 2.5-3.5 cm. |
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67 E. laxiflorus |
| + |
Leaf blade long subulate or broadly linear, ca. 14 × 2 cm. |
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90 E. prismatomerioides |
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| 28 (22) |
Leaf blade narrowly elliptic, delicate. |
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61 E. gracillimus |
| + |
Leaf blade variously ovate |
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(29) |
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| 29 (28) |
Veins curved or nearly arched; leaf blade elliptic to ovate |
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(30) |
| + |
Veins pinnate; leaf blade lanceolate to oblong |
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(32) |
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| 30 (29) |
Leaf blade veins even with surface. |
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70 E. microcarpus |
| + |
Leaf blade veins concave adaxially and prominent abaxially |
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(31) |
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| 31 (30) |
Leaf blade usually entire, sometimes slightly serrate toward apex. |
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54 E. bullatus |
| + |
Leaf blade margin ciliate to sharply and finely denticulate. |
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82 E. tenuiserratus |
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| 32 (29) |
Leaf blade large, ca. 16 cm |
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(33) |
| + |
Leaf blade small, less than 13 cm |
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(34) |
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| 33 (32) |
Leaf blade obovate-elliptic or oblong-lanceolate, 7-11 × 2.5-5 cm, margin large denticulate. |
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71 E. myrianthus |
| + |
Leaf blade long lanceolate, 10-15 × ca. 3 cm, margin remotely serrulate. |
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79 E. salicifolius |
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| 34 (32) |
Capsule 2-2.8 cm. |
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88 E. wui |
| + |
Capsule 0.8-1.7 cm |
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(35) |
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| 35 (34) |
Leaf blade thickly papery to thinly leathery; capsule more than 1.5 cm. |
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65 E. kachinensis |
| + |
Leaf blade thickly leathery; capsule 0.8-1.7 cm |
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(36) |
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| 36 (35) |
Leaf blade narrowly lanceolate, acuminate or acute at both ends, pubescent on both surfaces; mature fruit pubescent. |
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78 E. pittosporoides |
| + |
Leaf blade usually oblong to ovate, cordate or nearly so at base; leaf and fruit without pubescence. |
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74 E. nitidus |
