British ferns (Filicopsida)

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L. Watson and M. J. Dallwitz

Contents

These keys and descriptions were generated from a DELTA database (Dallwitz 1980; Dallwitz, Paine, and Zurcher 1993).

Introduction

Conventional key • Interactive keys and interactive information retrieval (using Intkey or Navikey)

The Intkey interactive key allows free choice of characters, is easy to use, and can lead to correct identifications in spite of occasional errors. It can display all the illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.

Character list • Implicit attributes

Poems by Giles Watson

Acknowledgements • References • Citation • Contacts, conditions of use, contributions

Descriptions

The bold parts in the descriptions are diagnostic descriptions, generated with the aid of Intkey (Dallwitz et al. 1993). They distinguish most taxa in at least one respect from the other taxa.

• Adiantum capillus-veneris L. • Adiantum raddianum K. Presl • Anogramma leptophylla (L.) Link • Asplenium adiantum-nigrum L. • Asplenium fontanum (L.) Bernh. • Asplenium marinum L. • Asplenium obovatum Viv. • Asplenium onopteris L. • Asplenium ruta-muraria L. • Asplenium septentrionale L.) Hoffm. • Asplenium trichomanes L. • Asplenium viride Huds. • Athyrium distentifolium Tausch ex Opiz • Athyrium filix-femina (L.) Roth • Athyrium flexile (Newman) Druce • Azolla filiculoides Lam.

• Blechnum cordatum (Desv.) Hieron. • Blechnum spicant (L.) Roth • Botrychium lunaria (L.) Sw.

• Ceterach officinarum DC. • Cryptogramma crispa (L.) R. Br. ex Hook. • Cyrtomium falcatum (L. f.) C. Presl • Cystopteris alpina (Lam.) Desv. • Cystopteris diaphana (Bory) Blasdell • Cystopteris dickieana Sim • Cystopteris fragilis (L.) Bernh. • Cystopteris montana (Lam.) Desv.

• Dicksonia antarctica Labill. • Dryopteris aemula (Ait.) O Kuntze • Dryopteris affinis (Lowe) Fraser-Jenkins • Dryopteris carthusiana Villar) H.P. Fuchs • Dryopteris cristata (L.) A. Gray • Dryopteris dilatata Hoffm.) A. Gray • Dryopteris expansa (C. Presl) Fraser-Jenk. & Jermy • Dryopteris filix-mas (L.) Schott • Dryopteris oreades Formin • Dryopteris remota (A. Braun ex Döll) Druce • Dryopteris submontana (Fraser-Jenk. & Jermy) Fraser-Jenk.

• Gymnocarpium dryopteris (L.) Newman • Gymnocarpium robertianum (Hoffm.) Newman

• Hymenophyllum tunbrigense (L.) Sm. • Hymenophyllum wilsonii Hook.

• Matteuccia struthiopteris (L.) Tod.

• Onoclea sensibilis L. • Ophioglossum azoricum C. Presl • Ophioglossum lusitanicum L. • Ophioglossum vulgatum L. • Oreopteris limbosperma (All.) Holub • Osmunda regalis L.

• Phegopteris connectilis (Michx.) Watt • Phyllitis scolopendrium (L.) Newm. • Phymatodes diversifolia (Willd.) Pic. Serm. • Pilularia globulifera L. • Polypodium cambricum L. • Polypodium interjectum Shivas • Polypodium vulgare L. • Polystichum aculeatum (L.) Roth) • Polystichum lonchitis (L.) Roth • Polystichum munitum (Kaulf.) C. Presl • Polystichum setiferum (Forsk.) Woynar • Pteridium aquilinum (L.) Kuhn subsp. aquilinum • Pteridium aquilinum (L.) Kuhn subsp. latiusculum • Pteris cretica L.

• Thelypteris palustris Schott • Trichomanes speciosum Willd.

• Woodsia alpina (Bolton) S.F. Gray • Woodsia ilvensis (L.) R.Br. • Woodwardia radicans (L.) Sm.


Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2004 onwards. British ferns (Filicopsida). Version: 4th January 2012. http://delta-intkey.com’.

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