| 1 |
Ovary and fruit glabrous |
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(2) |
| + |
Ovary and fruit pubescent or at least ovary sparsely pubescent |
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(13) |
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| 2 (1) |
Current year branchlets clearly 2- or 4-ribbed |
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(3) |
| + |
Current year branchlets terete or slightly 2-ribbed |
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(6) |
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| 3 (2) |
Fruit ovate-ellipsoid; current year branchlets 4-ribbed; leaf blade papery, secondary veins adaxially impressed. |
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26 E. impressinervis |
| + |
Fruit globose; current year branchlets 2- or 4-ribbed; leaf blade leathery or thickly leathery, secondary veins adaxially raised |
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(4) |
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| 4 (3) |
Current year branchlets 2-ribbed; terminal buds pubescent; sepal margins glandular; style 3-3.5 mm. |
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23 E. jintungensis |
| + |
Current year branchlets 4-ribbed; terminal buds glabrous; sepal margins not glandular; style ca. 2 mm |
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(5) |
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| 5 (4) |
Leaf blade oblong to obovate-lanceolate, 5-10 cm, secondary veins abaxially raised, apex acuminate. |
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24 E. tetragonoclada |
| + |
Leaf blade elliptic to ovate-elliptic, 3-4.5 cm, secondary veins abaxially visible to slightly raised, apex slightly obtuse. |
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25 E. hupehensis |
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| 6 (2) |
Sepals ovate |
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(7) |
| + |
Sepals suborbicular or orbicular |
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(8) |
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| 7 (6) |
Current year branchlets terete; petiole 2-3 mm; pedicel 2-2.5 mm. |
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28 E. wuliangshanensis |
| + |
Current year branchlets slightly ribbed; petiole 5-10 mm; pedicel 0.4-1 mm. |
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31 E. septata |
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| 8 (6) |
Leaf blade 2-3 cm, apex rounded and retuse; sepals 1-1.5 mm. |
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29 E. emarginata |
| + |
Leaf blade 4-18 cm, apex acute, acuminate, or caudate; sepals 2-4 mm |
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(9) |
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| 9 (8) |
Sepals outside pubescent |
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(10) |
| + |
Sepals outside glabrous |
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(11) |
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| 10 (9) |
Style 5-5.5 mm; petals ca. 9 mm; leaf blade secondary veins ca. 25 on each side of midvein and adaxially impressed. |
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20 E. magniflora |
| + |
Style ca. 3 mm; petals ca. 4 mm; leaf blade secondary veins 20-24 on each side of midvein and adaxially raised. |
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21 E. bifidostyla |
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| 11 (9) |
Leaf blade secondary veins 6-8 on each side of midvein, apex acute and with a retuse tip. |
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30 E. glaberrima |
| + |
Leaf blade secondary veins 9-13 on each side of midvein, apex acuminate, falcately acuminate, or caudate-acuminate |
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(12) |
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| 12 (11) |
Petiole 10-13 mm; leaf blade narrowly oblong-lanceolate to lanceolate. |
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19 E. luchunensis |
| + |
Petiole 4-5 mm; leaf blade oblong-elliptic to elliptic. |
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27 E. muricata |
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| 13 (1) |
Sepals ovate, leathery, brown when dry, apex acute; current year branchlets spreading villous |
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(14) |
| + |
Sepals orbicular, membranous, pale green or yellowish green when dry, apex emarginate or apiculate; current year branchlets pubescent or spreading villous |
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(19) |
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| 14 (13) |
Styles 4 or 5, distinct; stamens 22-28; leaf blade papery, secondary veins adaxially slightly impressed or obscure. |
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1 E. ciliata |
| + |
Styles 3, distinct or variously connate; stamens 5-11 or 15-19; leaf blade papery, thinly leathery, or leathery, secondary veins adaxially obscure |
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(15) |
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| 15 (14) |
Styles ca. 1.5 mm, distinct; leaf blade lanceolate. |
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6 E. strigillosa |
| + |
Style 2-6 mm, apically 3(or 4)-lobed or parted; leaf blade oblong, oblong-lanceolate, ovate-lanceolate, or ovate-oblong |
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(16) |
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| 16 (15) |
Stamens 15-19; leaf blade base obtuse, subrounded, obliquely rounded, or obliquely cordate |
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(17) |
| + |
Stamens 5-11; leaf blade base auriculate and amplexicaul |
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(18) |
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| 17 (16) |
Leaf blade oblong-lanceolate to ovate-lanceolate, 5-9 cm, leathery; style apically 3(or 4)-lobed. |
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2 E. patentipila |
| + |
Leaf blade ovate-lanceolate to ovate-oblong, 3.5-6 cm, papery; style 3-parted almost to base. |
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3 E. distichophylla |
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| 18 (16) |
Stamens 10 or 11; ovary and fruit pubescent; sepals outside pubescent. |
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4 E. auriformis |
| + |
Stamens 5-10; ovary sparsely pubescent when young, soon glabrescent; sepals glabrous. |
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5 E. disticha |
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| 19 (13) |
Styles 3-5, distinct or nearly so |
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(20) |
| + |
Style 3(-5)-lobed |
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(22) |
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| 20 (19) |
Styles 3 or 4, ca. 2 mm; leaf blade thickly leathery, secondary veins impressed on both surfaces. |
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9 E. rugosa |
| + |
Styles 4 or 5, 2.5-5 mm; leaf blade papery, thinly leathery, or leathery, secondary veins visible or slightly raised on both surfaces |
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(21) |
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| 21 (20) |
Leaf blade elliptic, abaxially appressed pubescent; petiole abaxially velutinous. |
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7 E. velutina |
| + |
Leaf blade oblong to narrowly oblanceolate, abaxially glabrescent; petiole glabrous. |
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8 E. pittosporifolia |
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| 22 (19) |
Ovary at first sparsely pubescent, soon glabrescent; fruit usually glabrous or rarely sparsely pubescent; leaf blade 7-20 × 2.5-7.5 cm |
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(23) |
| + |
Ovary and fruit pubescent; leaf blade 3-8 × 1-2 cm |
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(26) |
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| 23 (22) |
Current year branchlets 2-ribbed, glabrous; terminal buds densely grayish white pubescent; leaf blade margin densely serrulate. |
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22 E. persicifolia |
| + |
Current year branchlets terete, glabrous, puberulent, or pubescent; terminal buds glabrous, puberulent, densely silvery sericeous, or densely pubescent; leaf blade margin entire or only apical 1/2 serrate |
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(24) |
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| 24 (23) |
Ovary glabrous or very sparsely pubescent; style ca. 5 mm. |
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18 E. pseudocerasifera |
| + |
Ovary glabrous; style 3-5.5 mm |
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(25) |
| |
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| 25 (24) |
Style 5-5.5 mm; petals ca. 9 mm; leaf blade elliptic to oblong, 8-15 × 3.5-7.5 cm, secondary veins ca. 25 on each side of midvein and adaxially impressed. |
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20 E. magniflora |
| + |
Style ca. 3 mm; petals ca. 4 mm; leaf blade elliptic to elliptic-lanceolate, 6-12 × 2-4 cm, secondary veins 20-24 on each side of midvein and adaxially raised. |
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21 E. bifidostyla |
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| 26 (22) |
Current year branchlets densely spreading villous |
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(27) |
| + |
Current year branchlets pubescent or glabrescent |
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(29) |
| |
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| 27 (26) |
Anthers not locellate; leaf blade base obliquely cordate to subcordate, apex obtuse to acute. |
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17 E. subcordata |
| + |
Anthers locellate; leaf blade base cuneate to rounded, apex acuminate |
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(28) |
| |
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| 28 (27) |
Anthers 4-6-locellate; sepals sparsely pubescent to subglabrous; leaf blade base cuneate, secondary veins adaxially obscure. |
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15 E. kueichowensis |
| + |
Anthers 2- or 3-locellate; sepals glabrous; leaf blade base rounded, secondary veins adaxially impressed. |
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16 E. henryi |
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| 29 (26) |
Style ca. 2 mm |
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(30) |
| + |
Style 3-5 mm |
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(31) |
| |
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| 30 (29) |
Anthers locellate; style 3- or 4-parted; current year branchlets 2-ribbed; leaf blade narrowly elliptic, 4-7 cm. |
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13 E. gnaphalocarpa |
| + |
Anthers not locellate; style 4- or 5-parted; current year branchlets terete; leaf blade oblong-elliptic, 7-11 cm. |
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14 E. megatrichocarpa |
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| 31 (29) |
Anthers not locellate; current year branchlets pubescent when young, soon glabrescent; leaf blade abaxially glabrous. |
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12 E. acuminatissima |
| + |
Anthers locellate; current year branchlets pubescent; leaf blade abaxially sparsely pubescent |
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(32) |
| |
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| 32 (31) |
Current year branchlets reddish brown; sepals orbicular, outside pubescent, margin ciliolate, apex emarginate; fruit globose. |
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10 E. trichocarpa |
| + |
Current year branchlets yellowish brown; sepals ovate, glabrous, margin not ciliolate, apex acute; fruit ovate-ellipsoid. |
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11 E. acutisepala |
