| 1 |
Ovary densely hairy. |
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(2) |
| + |
Ovary glabrous. |
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(3) |
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| 2 (1) |
Young leaves and flowers flexuose rust-colored tomentose; fruit brown, ± globose. |
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1 H. vestita |
| + |
Young leaves and flowers rust-colored tomentulose; fruit purplish black, obovoid to ellipsoid. |
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2 H. obovatifolia |
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| 3 (1) |
Branchlets (apices excepted in some species) and leaves glabrous when young. |
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(4) |
| + |
Branchlets and leaves densely hairy when young. |
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(11) |
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| 4 (3) |
Branchlets apically glabrous. |
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(5) |
| + |
Branchlets apically hairy. |
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(7) |
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| 5 (4) |
Fruit apex not beaked; pericarp leathery, ca. 0.5 mm thick. |
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17 H. cochinchinensis |
| + |
Fruit apex markedly beaked; pericarp woody, 1-1.5 mm thick. |
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(6) |
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| 6 (5) |
Leaf blade leathery, margin entire or remotely denticulate; petiole 10-20 mm; rachis and pedicel pilosulose; pedicel 2.5-3 mm; perianth ca. 2.5 cm, pilosulose. |
|
11 H. dongxingensis |
| + |
Leaf blade papery, margin serrate on apical half; petiole 1-6 mm; rachis and pedicel glabrous; pedicel 3-5 mm; perianth 1.5-2.2 cm, glabrous. |
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12 H. hainanensis |
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| 7 (4) |
Bracts of flower pairs 4-10 mm. |
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18 H. shweliensis |
| + |
Bracts of flower pairs 1-3 mm. |
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(8) |
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| 8 (7) |
Leaf blade with reticulate veins conspicuous on both surfaces. |
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(9) |
| + |
Leaf blade with reticulate veins conspicuous only on adaxial surface. |
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(10) |
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| 9 (8) |
Perianth 1.3-1.6 cm; hypogynous glands basally connate. |
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14 H. reticulata |
| + |
Perianth 1-1.4 cm; hypogynous glands free. |
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15 H. rengetiensis |
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| 10 (8) |
Petiole 2-4.5 cm; perianth white, 1.6-2.5 cm; hypogynous glands connate. |
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19 H. longipetiolata |
| + |
Petiole 0.8-2 cm; perianth greenish white or reddish, 1.2-1.6 cm; hypogynous glands free. |
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20 H. falcata |
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| 11 (3) |
Leaves and rachis of inflorescences hairy when young, mature leaf blade glabrescent. |
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(12) |
| + |
Leaves and rachis of inflorescence rust-colored tomentose when young, mature leaf blade adaxially hairy or with hairs along midvein. |
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(16) |
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| 12 (11) |
Reticulate veins inconspicuous. |
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16 H. kwangtungensis |
| + |
Reticulate veins conspicuous. |
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(13) |
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| 13 (12) |
Pericarp woody. |
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(14) |
| + |
Pericarp leathery. |
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(15) |
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| 14 (13) |
Bracts of flower pairs ovate, ca. 1 mm; pedicel glabrous, 3-4 mm; perianth 1.2-1.5 cm. |
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9 H. tsaii |
| + |
Bracts of flower pairs lanceolate, ca. 2 mm; pedicel pilosulose, 6-7 mm; perianth 1.6-1.8 cm. |
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10 H. tibetensis |
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| 15 (13) |
Bracts of flower pairs ca. 1 mm, pilose; fruit dark green, ± globose, 2.5-3.5 cm in diam.; pericarp 1.5-3 mm thick. |
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13 H. nilagirica |
| + |
Bracts of flower pairs 1.5-2 mm, glabrous; fruit black, broadly ellipsoid, ca. 1.5 cm in diam.; pericarp ca. 1 mm thick. |
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14 H. reticulata |
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| 16 (11) |
Perianth 2-3 cm; rachis 2-4 mm in diam. at anthesis. |
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(17) |
| + |
Perianth 1-2 cm; rachis 1-2.5 mm in diam. at anthesis. |
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(18) |
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| 17 (16) |
Petiole 0.2-1.5 cm; leaf blade ± leathery, abaxially tomentose. |
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3 H. grandis |
| + |
Petiole 2.5-3 cm; leaf blade papery, abaxially pilose along midvein. |
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4 H. pyrrhobotrya |
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| 18 (16) |
Perianth 1-1.4 cm, glabrous; pericarp leathery. |
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(19) |
| + |
Perianth 1.4-2 cm, pilose; pericarp woody. |
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(20) |
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| 19 (18) |
Mature leaf blade oblanceolate, adaxially pilose along midvein, margin dentiform serrate; rachis 1.5 mm in diam. |
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5 H. silvicola |
| + |
Mature leaf blade broadly obovate-oblong to obovate, both surfaces pilose along midvein, margin remotely serrate or rarely entire; rachis 2.5 mm in diam. |
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6 H. clivicola |
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| 20 (18) |
Perianth 1.5-2 cm; mature leaf blade abaxially pilose along all veins, margin toothed; inflorescences 10-24 cm. |
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7 H. formosana |
| + |
Perianth 1.4-1.5 cm; mature leaf blade abaxially pilose along midvein, margin entire; inflorescences 7-8 cm. |
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8 H. yangchunensis |
