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1. Hypodematium Kunze, Flora. 16: 690. 1833.
肿足蕨属 zhong zu jue shu
Authors: Zhang Gangmin & Kunio Iwatsuki
Plants mostly rupestral (on rocks or walls), medium-sized or small. Rhizomes shortly creeping or ascending, stout, dictyostelic, densely covered with large scales; scales persistent, light brown, lustrous, ovate-lanceolate or rarely linear-lanceolate, margin entire or seldom denticulate, apex acuminate. Fronds approximate or subclustered; stipe stramineous, base swollen into shuttle form and concealed in scales, with 2 vascular bundles, upward usually glabrous, pubescent, or glandular; lamina ovate-oblong to pentagonal-ovate, truncate at base, 3-pinnate to finely 4-pinnate-pinnatifid, anadromous, basal pinnae largest, upper ones gradually reduced, herbaceous or papery, both surfaces, rachises, and costules frequently covered with acicular and/or glandular hairs, rarely glabrous. Veins free, pinnate, branches simple or forked, ending at margin. Sori orbicular, located at middle of veinlets; indusia persistent, large, reniform or horseshoe-shaped, membranous, ± covered with acicular or glandular hairs, rarely glabrous. Spores ellipsoid, bearing prominent, inflated folds with papillate elements. x = 41, 40.
About 16 species: mainly in subtropical and warm-temperate regions of Asia and Africa; 12 species (eight endemic) in China.
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| 1 |
Fronds ?covered with rod-shaped, glandular hairs abaxially |
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(2) |
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Fronds not covered with rod-shaped, glandular hairs abaxially |
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(6) |
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| 2 (1) |
Rachis and costae with grayish white soft hairs mixed together with glandular hairs |
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(3) |
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Fronds only covered with rod-shaped, glandular hairs abaxially, without grayish white soft hairs |
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(4) |
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| 3 (2) |
Plants up to 85 cm tall; fronds 5-pinnatifid; stipes glabrous; indusia large, covered with long soft hairs. |
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8 H. daochengense |
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Plants up to 56 cm tall; fronds 4-pinnatifid; stipes and indusia covered with short hairs and golden glandular hairs. |
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9 H. glanduloso-pilosum |
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| 4 (2) |
Fronds thickly papery; stipes usually shorter than fronds; sori usually confluent when mature; indusia light brown, glabrous or with 1 or 2 glandular hairs. |
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12 H. glandulosum |
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Fronds thin, herbaceous; stipes usually longer than fronds; sori separate from each other when mature; indusia grayish white, sparsely glandular hairy |
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(5) |
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| 5 (4) |
Stipes glabrous; second and upper pairs of pinnae oblong-lanceolate, apex acuminate, base rounded-cuneate. |
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10 H. sinense |
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Stipes sparsely glandular hairy; second and upper pairs of pinnae oblong, apex obtuse or acute, base cordate. |
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11 H. fordii |
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| 6 (1) |
Fronds and indusia glabrous. |
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7 H. glabrum |
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Fronds and indusia ?covered with hairs |
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(7) |
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| 7 (6) |
Indusia densely covered with grayish white acicular hairs |
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(8) |
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Indusia sparsely shortly hairy |
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(10) |
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| 8 (7) |
Stipe and rachis densely covered with hairs. |
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1 H. crenatum |
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Stipes except base glabrous |
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(9) |
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| 9 (8) |
Pinnule lobes acute, apex without teeth; lamina without reddish brown and lanceolate scales abaxially. |
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2 H. villosum |
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Pinnule lobes oblong, apex with 2-4 teeth; lamina with reddish brown and lanceolate scales abaxially. |
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3 H. hirsutum |
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| 10 (7) |
Plants up to 60 cm tall; stipes except base glabrous; indusia reddish brown. |
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4 H. taiwanense |
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Plants 20-40 cm tall; stipes covered with grayish white hairs; indusia pale gray |
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(11) |
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| 11 (10) |
Rachis and costae densely covered with short hairs. |
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5 H. gracile |
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Rachis and costae densely covered with hairs and sparsely mixed with reddish brown, linear-lanceolate scales. |
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6 H. squamuloso-pilosum |
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List of lower taxa
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