1 |
Sori exindusiate; scale margin entire |
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(2) |
+ |
Sori indusiate; scale margin fimbriate or entire |
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(3) |
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2 (1) |
Pinnae usually ca. 10 pairs (sometimes fewer); stipe and rachis sparsely clothed with black or brown-black, linear-lanceolate scales. |
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6 D. scottii |
+ |
Pinnae up to 20 pairs; stipe and rachis densely clothed with dark brown or brown, broadly lanceolate scales. |
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7 D. liangkwangensis |
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3 (1) |
Sori in 1 or 2 rows on each side of costa |
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(4) |
+ |
Sori in more than 3 rows, rarely 1 or 2 rows |
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(5) |
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4 (3) |
Pinna base cordate, apex rounded; stipe and rachis clothed with black, nodose setae. |
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8 D. cyclopeltidiformis |
+ |
Pinna base rounded, apex acuminate; stipe and rachis without nodose setae. |
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9 D. hangchowensis |
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5 (3) |
Sori marginal or submarginal |
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(6) |
+ |
Sori broadly distributed abaxially |
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(8) |
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6 (5) |
Sori marginal. |
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10 D. handeliana |
+ |
Sori submarginal |
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(7) |
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7 (6) |
Scales on stipe black, linear-lanceolate. |
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11 D. namegatae |
+ |
Scales on stipe brown or pale brown. |
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12 D. dickinsii |
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8 (5) |
Pinnae crenate to shallowly pinnatifid |
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(9) |
+ |
Pinnae pinnatifid and basally pinnatisect |
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(15) |
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9 (8) |
Stipe with brown scales |
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(10) |
+ |
Stipe with black or brownish black scales |
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(11) |
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10 (9) |
Sori close to costa, with wide sterile belt on both sides of costa distal to sori; rachis densely clothed with scales. |
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18 D. pycnopteroides |
+ |
Sori medial in segments, with narrow sterile belt on both sides of costa distal to sori; rachis sparsely clothed with scales. |
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19 D. subpycnopteroides |
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11 (9) |
Lowest few pinnae shorter, often deflexed. |
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13 D. cycadina |
+ |
Lowest pinnae not shorter or slightly shorter, not deflexed |
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(12) |
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12 (11) |
Pinnae 30-40 pairs, crenulate. |
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17 D. stenolepis |
+ |
Pinnae ca. 20 pairs, shallowly pinnatifid |
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(13) |
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13 (12) |
Indusia vestigial, not covering sori; pinnae shortly stalked, herbaceous. |
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16 D. commixta |
+ |
Indusia covering sori completely; pinnae sessile, papery |
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(14) |
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14 (13) |
Pinnae acuminate, not auriculate at pinna base. |
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14 D. atrata |
+ |
Pinnae caudate, auriculate at both sides of pinna base. |
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15 D. wuyishanica |
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15 (8) |
Segments broadly triangular, with a cartilaginous margin; sori 5-7 pairs, arranged on both sides of costa in a V-pattern on each pinna. |
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20 D. thibetica |
+ |
Segments oblong, without a cartilaginous margin; sori in 2-6 rows along pinna rachis |
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(16) |
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16 (15) |
Scales on rachis almost black. |
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21 D. lunanensis |
+ |
Scales on rachis brown or dark brown |
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(17) |
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17 (16) |
Scales on stipe and rachis subulate to narrowly lanceolate. |
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22 D. microlepis |
+ |
Scales on stipe and rachis lanceolate to linear |
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(18) |
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18 (17) |
Pinnae ca. 17 pairs. |
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25 D. paralunanensis |
+ |
Pinnae 20-40 pairs |
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(19) |
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19 (18) |
Pinnae serrate-dentate, only lower pinnae pinnatifid; rachis sparsely scaly. |
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23 D. subatrata |
+ |
Pinnae usually lobed halfway to costa; rachis densely scaly |
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(20) |
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20 (19) |
Lamina 50-60 ?ca. 25 cm, base truncate; pinnae ca. 20 pairs. |
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24 D. pseudolunanensis |
+ |
Lamina larger than 60 ?24 cm, narrowed at base; pinnae 20-40 pairs |
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(21) |
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21 (20) |
Pinnae to 25 pairs; pinna lobes to 15(-20) pairs. |
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26 D. jiucaipingensis |
+ |
Pinnae 30-40 pairs; pinna lobes to 25 pairs. |
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27 D. conjugata |