| 1 |
Styles united throughout their length into a single column, not divided apically in fruit, stigmas sessile |
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(2) |
| + |
Styles partially or entirely divided, with evident (sometimes small) free arms apically |
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(5) |
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| 2 (1) |
Secondary and tertiary veins on leaves prominently raised on both surfaces, leaves all unlobed. |
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11 D. caloneurus |
| + |
Secondary and tertiary veins on leaves weakly raised or obscure, leaves often dimorphic, some unlobed and some deeply 2- or 3-cleft |
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(3) |
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| 3 (2) |
Trees to 18 m tall; inflorescence a panicle of (2 or)3-5 umbels, with an evident primary axis 1-4(-5.5) cm. |
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12 D. hainanensis |
| + |
Shrubs or small trees to ca. 3 m tall; inflorescence of 1(or 2) or 3-5 umbels usually borne from a single point |
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(4) |
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| 4 (3) |
Plants andromonoecious, inflorescence often with 1 umbel of bisexual flowers and (2 or)3 or 4 umbels of later-blooming male flowers; peduncles of bisexual umbels 3-6 cm; leaves usually glandular punctate. |
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13 D. trifidus |
| + |
Plants hermaphroditic, inflorescence of 1-3(-5) umbels of bisexual flowers; peduncles 0.5-2.5 cm; leaves usually not glandular punctate. |
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14 D. proteus |
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| 5 (1) |
Ovary 2-4-carpellate, style arms 2-4; fruit not ribbed when dry |
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(6) |
| + |
Ovary 5-carpellate, style arms 5; fruit usually ribbed when dry |
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(9) |
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| 6 (5) |
Ovary (3 or)4-carpellate, styles (3 or)4; calyx with 5 persistent triangular teeth 0.5-0.8 mm high. |
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7 D. oligodontus |
| + |
Ovary 2- or 3-carpellate, styles 2 or 3; calyx entire or minutely 5-toothed |
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(7) |
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| 7 (6) |
Styles appressed into a column at anthesis, then divided only apically in fruit. |
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8 D. kwangsiensis |
| + |
Styles free for at least 1/2 their length, divergent apically in flower and fruit |
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(8) |
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| 8 (7) |
Leaves ovate-oblong, 7-18(-22) × 2-5(-7) cm, with 6-12 pairs of lateral veins. |
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9 D. stellatus |
| + |
Leaves obovate-oblong to elliptic, 5-11 × 1.5 -4.5 cm, with 6-8 pairs of lateral veins. |
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10 D. bilocularis |
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| 9 (5) |
Fruit (7.5-)8-12 mm high; styles divided to base (even in flower), without an evident column above broadly conic disk; largest leaf blades (9-)14-19 cm. |
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1 D. chevalieri |
| + |
Fruit less than 8 mm high; styles united at least basally (sometimes obscurely so), forming an evident column above disk; largest leaf blade usually no more than 12 cm |
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(10) |
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| 10 (9) |
Glandular punctae prominent, usually visible to naked eye. |
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2 D. pellucidopunctatus |
| + |
Glandular punctae minute, visible only with a hand lens |
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(11) |
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| 11 (10) |
Secondary and tertiary venation of leaves evident on both surfaces |
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(12) |
| + |
Secondary and tertiary venation of leaves obscure, especially abaxially |
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(13) |
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| 12 (11) |
At least some leaf blades obovate-elliptic, broadest above middle, tertiary veins usually impressed adaxially in dry material. |
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3 D. burmanicus |
| + |
Leaf blades ovate-elliptic or ovate-lanceolate to elliptic, broadest at or below middle, tertiary veins usually prominently raised adaxially in dry material. |
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4 D. dentiger |
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| 13 (11) |
Fruit oblong-ovoid; styles 1.5-1.8 mm in fruit. |
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5 D. productus |
| + |
Fruit globose; styles ca. 1 mm in fruit. |
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6 D. confertus |
