Polypodium L.
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publication ID |
https://doi.org/10.5281/zenodo.302862 |
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persistent identifier |
https://treatment.plazi.org/id/1213417E-FFD8-FFDA-CD3E-F8EC4ED7C368 |
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treatment provided by |
Plazi |
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scientific name |
Polypodium L. |
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1. Polypodium L. View in CoL 3
Rhizomes creeping. Leaves uniform; lamina pinnatifid or pinnate, glabrous, without scales; pinnae entire or dentate, veins free. Sori orbicular or elliptical, without indusium.
The genus consists, in Europe, of a polyploid complex in which 3 fairly well-defined taxa can be recognized. These all have deeply pinnatifid leaves up to 50 cm or more in length; the lamina is longer than the petiole, and the pinnae are usually alternate, and 5-28 on each side. The sori are arranged in one row on either side of the midrib of the pinna. All the species grow on rocks and walls, or, in the wetter parts of Europe, as epiphytes on trees.
Literature: M. G. Shivas, Jour. Linn. Soc. London (Bot.) 58: 13-38 (1961). 1 Soriwith paraphyses; scalesofrhizome5-11 mm 1. australe 1 Sori without paraphyses; scales of rhizome 3-6 mm 2 Sori orbicular; annulus with 10-15 indurated cells 2. vulgare 2 Sori elliptical; annulus with 6-10 indurated cells 3. interjectum
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