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FOC | Family List | FOC Vol. 2-3 | Davalliaceae

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.

1 Lamina elongate and narrowly ovate; lowest pinna similar to upper one   (2)
+ Lamina ovate or triangular-ovate; lowest pinna larger than upper one   (3)
2 (1) Lamina simple, with pectinate or pinnatifid margin.   1 H. pectinata
+ Lamina pinnate with pinnatilobed to pinnatifid pinnae toward base and in middle part, or sometimes bipinnate.   2 H. assamica
3 (1) Lamina 0.6-24 ?0.5-14 cm; rhizome 0.5-3 mm in diam. (without scales), white waxy under scales.   3 H. repens
+ Lamina 10-32 ?8-27 cm; rhizome 3-6 mm in diam. (without scales), not white waxy.   4 H. griffithiana

Lower Taxa


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