| 1 |
Seeds inserted near base of capsule with wing pointing toward capsule apex, wing ca. 3 × as long as seed. |
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(2) |
| + |
Seeds inserted near middle of capsule, winged all round. |
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(4) |
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| 2 (1) |
Leaf blade margin usually entire, rarely obscurely undulate |
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3 D. tokoro |
| + |
Leaf blade margin deeply lobed to obscurely undulate. |
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(3) |
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| 3 (2) |
Leaf blade abaxially glabrous or sparsely minutely hairy |
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1 D. nipponica |
| + |
Leaf blade abaxially densely shortly pilose along veins |
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2 D. althaeoides |
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| 4 (1) |
Capsule pruinose, drying blue-black; leaf blade drying blackish, often narrowly peltate. |
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(5) |
| + |
Capsule not pruinose, drying pale to dark brown; leaf blade never peltate. |
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(6) |
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| 5 (4) |
Leaf blade triangular-ovate, usually ± 3-lobed by enlargement of basal lobes; capsule about as long as wide |
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4 D. zingiberensis |
| + |
Leaf blade broadly triangular-ovate, sometimes 3- to obscurely 5-lobed; capsule longer than wide |
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5 D. sinoparviflora |
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| 6 (4) |
At least some leaves 3-foliolate. |
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(7) |
| + |
Leaves entire to deeply lobed, never compound. |
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(8) |
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| 7 (6) |
Leaves usually 3-foliolate, lateral leaflets subequaling middle leaflet |
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17 D. simulans |
| + |
Leaves often entire, lateral leaflets ca. 1/2 as long as middle leaflet, often incompletely separated |
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8 D. biformifolia |
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| 8 (6) |
Leaves often prickly on petiole and sometimes along main veins; stem with many prickles proximally |
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18 D. birmanica |
| + |
Leaves not prickly; stem not prickly or inconspicuously prickly at nodes (more easily felt than seen). |
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(9) |
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| 9 (8) |
Leaf blade slightly leathery, main veins often conspicuously pale; stem often shortly prickly at nodes. |
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(10) |
| + |
Leaf blade membranous to papery, main veins not pale; stem not prickly. |
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(11) |
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| 10 (9) |
Capsule 2.8--3.2 cm; leaves always simple |
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14 D. poilanei |
| + |
Capsule ca. 1.5 cm; distal leaves often 3-lobed to ± 3-foliolate with small, lateral leaflets |
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8 D. biformifolia |
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| 11 (9) |
Leaf blade usually distinctly lobed or toothed at margin, occasionally coarsely undulate, often abaxially papillose to hispidulous. |
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(12) |
| + |
Leaf blade entire to distinctly undulate at margin, occasionally obscurely 3-lobed. |
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(15) |
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| 12 (11) |
Leaf blade adaxially hairy |
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11 D. futschauensis |
| + |
Leaf blade adaxially glabrous. |
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(13) |
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| 13 (12) |
Capsule wings 1.5--1.6 cm wide; rhizome 2--5 cm thick, drying soft and spongy; basal leaf blades sometimes subequally 5--9-lobed or coarsely toothed |
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12 D. spongiosa |
| + |
Capsule wings 0.8--1.4 cm wide; rhizome often less than 2 cm thick, drying ± solid; basal leaf blades ovate to unequally 3(or 5)-lobed. |
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(14) |
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| 14 (13) |
Leaf blade papery, often abaxially hispid along veins; capsule wings (0.7--)1.2--1.4 cm wide |
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6 D. deltoidea |
| + |
Leaf blade membranous, glabrous; capsule wings 0.8--1.2 cm wide |
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16 D. banzhuana |
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| 15 (11) |
Leaf blade drying green, margin sometimes toothed. |
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(16) |
| + |
Leaf blade drying dark brown or black, margin entire to slightly undulate. |
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(17) |
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| 16 (15) |
Leaf blade 5--10(--12) × 2.5--7 cm |
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9 D. gracillima |
| + |
Leaf blade 10--18 × 6.5--11 cm |
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13 D. tenuipes |
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| 17 (15) |
Capsule yellowish brown, 2.4--2.7 cm; leaf blade drying dark brown |
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7 D. panthaica |
| + |
Capsule brown to dark brown, 1.5--2.1 cm; leaf blade drying ± black. |
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(18) |
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| 18 (17) |
Capsule wings 0.8--1.1 cm wide |
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10 D. collettii |
| + |
Capsule wings 1--1.7 cm wide |
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15 D. chingii |
