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| 1 |
Leaves ovate to elliptic-lanceolate, evidently narrowed toward bases, serrate on margins |
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(2) |
| + |
Leaves subulate to lanceolate, narrowed toward bases or not, denticulate on margins |
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(3) |
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| 2 (1) |
Leaves not crispate on margin. |
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15 H. serrata |
| + |
Leaves crispate on margin. |
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16 H. crispata |
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| 3 (1) |
Visible teeth on almost every leaf margin |
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(4) |
| + |
Visible teeth absent from many leaf margins, with only some small teeth on upper margins of some leaves |
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(6) |
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| 4 (3) |
Leaves long and thin, falcate, ratio of length to width up to 25. |
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19 H. kangdingensis |
| + |
Leaves relatively shorter and broader, straight, ratio of length to width smaller than 10 |
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(5) |
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| 5 (4) |
Plants up to 15 cm tall; upper leaves acuminate toward apex, papery, without clear midribs. |
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17 H. sutchueniana |
| + |
Plants up to 20 cm tall; upper leaves acute toward apex, thinly leathery, with clear midribs. |
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18 H. liangshanica |
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| 6 (3) |
Leaves not distinctly narrowed toward bases |
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(7) |
| + |
Leaves (at least leaves at base of plants) distinctly narrowed toward bases |
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(9) |
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| 7 (6) |
Plants smaller than 8 cm; leaves ascending and amplexicaul. |
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27 H. lajouensis |
| + |
Plants up to 20 cm tall; leaves ascending but not amplexicaul |
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(8) |
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| 8 (7) |
Leaves falcate, narrower than 1 mm. |
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25 H. herteriana |
| + |
Leaves straight, broader than 1-1.2 mm. |
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26 H. lucidula |
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| 9 (6) |
Leaves at base of plants spatulate; plants smaller than 12 cm; leaves at upper parts of plants lanceolate. |
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23 H. leishanensis |
| + |
Leaves at base of plants not spatulate |
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(10) |
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| 10 (9) |
Sporophylls much smaller than normal leaves; leaves acute toward apex, papery, lustrous. |
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24 H. chishuiensis |
| + |
Sporophylls not distinctly different from normal leaves |
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(11) |
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| 11 (10) |
Plants 4-17 cm tall; leaves narrowly elliptic-lanceolate, acuminate toward apex, flat abaxially, thinly papery, not lustrous. |
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22 H. kunmingensis |
| + |
Plants usually less than 12 cm tall; leaves ovate-lanceolate or elliptic to oblong-lanceolate, acute toward apex, vaulted or flat abaxially, thinly leathery to leathery, lustrous |
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(12) |
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| 12 (11) |
Plants 6-14 cm tall; leaves together with main stem 0.7-1.2 cm wide; leaves ovate-lanceolate, dense, reflexed or spreading, vaulted abaxially, 4-9 mm, 1.5-2 mm wide. |
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20 H. delavayi |
| + |
Plants 3.5-7 cm tall; leaves together with main stem 4-5 mm wide; leaves elliptic to oblong-lanceolate, sparse, strongly reflexed, flat abaxially, 1.5-3 mm, 0.7-1 mm wide. |
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21 H. dixitiana |
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