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4. Humata Cavanilles, Descr. Pl. 272. 1802.
阴石蕨属 yin shi jue shu
Davallia [unranked] Pachypleuria C. Presl; Pachypleuria (C. Presl) C. Presl.
Plants small, epiphytic. Rhizome long creeping, dictyostelic, densely scaly; scales peltate, broad at base, acuminate toward apex, margin often minutely ciliate or denticulate. Fronds remote; stipe slender, adaxially grooved, articulate to rhizome, scaly near base; lamina tripinnatifid, rarely simple or pinnatifid, usually deltoid, leathery; fertile lamina usually more dissected than sterile one. Veins free. Sori submarginal, terminal on acroscopic veinlet; indusium orbicular or semicircular-reniform, attached at base only, or by sides slightly above base, long stalked; annulus longitudinal, consisting of 12 thickened cells; spores elliptic, densely tuberculate; perispore absent. n = 10, (40).
About 50 species: mostly in SE Asia to Polynesia; four species in China.
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| 1 |
Lamina elongate and narrowly ovate; lowest pinna similar to upper one |
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(2) |
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Lamina ovate or triangular-ovate; lowest pinna larger than upper one |
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(3) |
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| 2 (1) |
Lamina simple, with pectinate or pinnatifid margin. |
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1 H. pectinata |
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Lamina pinnate with pinnatilobed to pinnatifid pinnae toward base and in middle part, or sometimes bipinnate. |
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2 H. assamica |
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| 3 (1) |
Lamina 0.6-24 ?0.5-14 cm; rhizome 0.5-3 mm in diam. (without scales), white waxy under scales. |
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3 H. repens |
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Lamina 10-32 ?8-27 cm; rhizome 3-6 mm in diam. (without scales), not white waxy. |
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4 H. griffithiana |
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Lower Taxa
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Treatments in Other Floras @ www.efloras.org
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