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IBSC | Family List | Pteridophyta | Gymnogrammitidaceae

Gymnogrammitis Grifith

雨蕨属

Description from Flora of China

Rhizome shortly creeping. Roots restricted to ventral side; scales not hairy but with marginal setae at least in distal part, not toothed, smooth adaxially, basifixed with cordate base and much overlapping basal lobes. Fronds monomorphic; stipe articulate to phyllopodia, grooved, glabrous or with few scales; lamina compound, 3- or 4-pinnate toward base and in middle part, toward base deltoid and broadest or elongate, often narrowed, glabrous; pinnae linear-triangular; pinnules of at least larger pinnae anadromous; pinnules or pinna lobes linear-oblong; ultimate segments or lobes obtuse or acute without a pronounced tooth. Rachis adaxially grooved. Lamina axes glabrous. Veins in ultimate lobes simple, not reaching margin; false veins not present. Sori exindusiate, frequently single on a segment, facing midveins at bending point.

Ching (Acta Phytotax. Sin. 16(3): 4; 16(4): 32. 1978) pointed out that the resemblance of Gymnogrammitis to the Davalliaceae, where this genus was previously placed, is superficial and suggested that it belongs in the Polypodiaceae. Recent molecular phylogeny has confirmed this and shown that the closest relationship is to the Selligueoid lineage of the Polypodiaceae.

One species: E and SE Asia.

(Authors: Zhang Xianchun (张宪春); Hans P. Nooteboom)


 

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