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

5. Lastreopsis Ching, Bull. Fan Mem. Inst. Biol., Bot. 8: 157. 1938.

节毛蕨属 jie mao jue shu

Authors: Shiyong Dong & Maarten J. M. Christenhusz

Trichoneuron Ching.

Plants terrestrial, 40-120 cm tall. Rhizomes creeping or ascending, rhizome apices and stipe bases densely covered with lanceolate scales. Fronds approximate or 1-3 cm apart; stipe brown to stramineous, with scales only at base; scales lanceolate, brown or dark brown, without iridescence. Lamina ovate to pentagonal, 3-5-pinnate; basal pinna pairs largest, triangular, basal basiscopic pinnules of basal pinnae longest; distal pinnae or pinnules adnate to rachis or costae and decurrent at their bases; veins all free, veinlets on ultimate pinnules or lobes simple or forked, usually not reaching margin of leaf segments; lamina texture herbaceous, hairy on both surfaces; costae of pinnules prominent, densely covered with hairs. Sori usually terminal on veins and near margins of pinna lobes; indusia present or not; spores ellipsoid to spheroidal, perispore with inflated folds or tuberculate, sometimes broadly winged. x = 41.

About 35 species: pantropical, extending into S temperate regions, most diverse in Australasia; three species (two endemic) in China.

1 Sori exindusiate.   2 L. subrecedens
+ Sori indusiate   (2)
2 (1) Rhizomes less than 0.5 cm in diam., stipes approximate; lamina 3-pinnate to 4-pinnatifid at base, with abundant glands on abaxial surfaces; hairs on lamina consisting of 3-6 cells.   3 L. tenera
+ Rhizomes up to 1.5 cm in diam., stipes distant (1-3 cm apart); lamina 4-pinnate to 5-pinnatifid at base, without glands on abaxial surfaces; hairs on lamina consisting of 10-25 cells.   1 L. microlepioides

Lower Taxa


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