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| 1 |
Plants 1-2.5 m tall, lateral pinnae 8-14 pairs, herbaceous, 2 or 3 basal pairs of veinlets not reaching margin, margins of pinnae nearly entire or with only shallow, undulate, rounded teeth. |
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1 D. bodinieri |
| + |
Plants 0.5-1 m tall, lateral pinnae 1-5 pairs, occasionally a few more, leathery or herbaceous, only basiscopic basal veinlet not reaching margin |
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(2) |
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| 2 (1) |
Stipe hard, scales black or brown, linear-subulate; pinnae narrow, generally ca. 2 cm wide, thinly leathery, often narrowed toward base. |
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5 D. podophylla |
| + |
Stipe weak, scales pale brown or red-brown, lanceolate; pinnae broad, 3-3.5 cm wide, papery, not narrowed toward base |
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(3) |
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| 3 (2) |
Pinnae 1-3 pairs (sometimes more), with nearly entire or sparse shallow rounded teeth. |
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2 D. sieboldii |
| + |
Pinnae 3-5(-7) pairs, with undulate-incised or partite margin |
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(4) |
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| 4 (3) |
Pinnae undulate-incised, with small rounded teeth. |
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3 D. enneaphylla |
| + |
Pinnae undulate-incised, base of apical pinnae partite, segments entire or undulate. |
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4 D. toyamae |
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