shield fern

shield fern
any of numerous ferns of the genera Dryopteris and Polystichum, having shield-shaped indusia.
[1805-15]

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▪ fern genus
also called  wood fern  or  log fern 

      any member of the fern genus Dryopteris, in the family Dryopteridaceae. The genus has about 250 species with worldwide distribution. Shield ferns are medium-sized woodland plants with bright green, leathery leaves that are several times divided. They have numerous round spore clusters (sori) attached along the veins on the underside of the leaves and protected by a tissue covering (indusium) that is reniform (kidney-shaped).

      Members of the closely related genus Polystichum, which differ from Dryopteris mainly in their peltate (umbrella-shaped) leaves, are also commonly known as shield fern. Polystichum contains about 200 species of worldwide distribution.

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Universalium. 2010.

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Look at other dictionaries:

  • Shield fern — Shield Shield, n. [OE. sheld, scheld, AS. scield, scild, sceld, scyld; akin to OS. scild, OFries. skeld, D. & G. schild, OHG. scilt, Icel. skj[ o]ldr, Sw. sk[ o]ld, Dan. skiold, Goth. skildus; of uncertain origin. Cf. {Sheldrake}.] 1. A broad… …   The Collaborative International Dictionary of English

  • shield fern — noun any of various ferns of the genera Dryopteris or Polystichum or Lastreopsis having somewhat shield shaped coverings on the sori • Syn: ↑buckler fern • Hypernyms: ↑fern • Hyponyms: ↑broad buckler fern, ↑Dryopteris dilatata, ↑ …   Useful english dictionary

  • shield-fern — /ˈʃild fɜn/ (say sheeld fern) noun any fern of the genus Polystichum which has peltate indusia, as mother shield fern, P. proliferum …  

  • shield-fern — papartis statusas T sritis vardynas apibrėžtis Papartinių (Dryopteridaceae) šeimos augalų gentis (Dryopteris). atitikmenys: lot. Dryopteris angl. fern; shield fern; woodfern vok. Dornfarn; Wurmfarn rus. щитовник lenk. nerecznica …   Dekoratyvinių augalų vardynas

  • shield fern — noun a fern with circular shield like scales protecting the spore cases. [Polystichum and other genera.] …   English new terms dictionary

  • Goldie's shield fern — noun North American fern with a blackish lustrous stipe • Syn: ↑Goldie s fern, ↑goldie s wood fern, ↑Dryopteris goldiana • Hypernyms: ↑shield fern, ↑buckler fern * * * noun see …   Useful english dictionary

  • soft shield fern — noun European shield fern cultivated in many varieties • Syn: ↑Polystichum setiferum • Hypernyms: ↑shield fern, ↑buckler fern • Member Holonyms: ↑Polystichum, ↑genus Polystichum …   Useful english dictionary

  • male shield-fern — kelminis papartis statusas T sritis vardynas apibrėžtis Papartinių šeimos dekoratyvinis, vaistinis nuodingas augalas (Dryopteris filix mas), paplitęs Europoje, Azijoje ir Šiaurės Amerikoje. atitikmenys: lot. Dryopteris filix mas angl. common… …   Lithuanian dictionary (lietuvių žodynas)

  • Japanese shield fern — vėlyvasis papartis statusas T sritis vardynas apibrėžtis Papartinių šeimos dekoratyvinis augalas (Dryopteris erythrosora), paplitęs rytų Azijoje. atitikmenys: lot. Dryopteris erythrosora angl. autumn fern; Japanese shield fern šaltinis… …   Lithuanian dictionary (lietuvių žodynas)

  • Shield — Shield, n. [OE. sheld, scheld, AS. scield, scild, sceld, scyld; akin to OS. scild, OFries. skeld, D. & G. schild, OHG. scilt, Icel. skj[ o]ldr, Sw. sk[ o]ld, Dan. skiold, Goth. skildus; of uncertain origin. Cf. {Sheldrake}.] 1. A broad piece of… …   The Collaborative International Dictionary of English

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