fern | | |
n. (plant) | 1. fern | any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores. |
| ~ pecopteris | Carboniferous fossil fern characterized by a regular arrangement of the leaflets resembling a comb. |
| ~ nonflowering plant, pteridophyte | plants having vascular tissue and reproducing by spores. |
| ~ fern seed | the asexual spore of ferns that resembles dust; once thought to be seeds and to make the possessor invisible. |
| ~ film fern, filmy fern | any fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves. |
| ~ bristle fern, filmy fern | any fern of the genus Trichomanes having large pinnatifid often translucent fronds; most are epiphytic on tree branches and twigs or terrestrial on mossy banks. |
| ~ osmund, flowering fern | any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters. |
| ~ crape fern, leptopteris superba, prince-of-wales feather, prince-of-wales fern, prince-of-wales plume, todea superba | New Zealand with pinnate fronds and a densely woolly stalks; sometimes included in genus Todea. |
| ~ crepe fern, king fern, todea barbara | fern of rain forests of tropical Australia and New Zealand and South Africa. |
| ~ curly grass, curly grass fern, schizaea pusilla | rare small fern of northeastern North America having numerous slender spiraling fronds and forming dense tufts. |
| ~ anemia adiantifolia, pine fern | fern of Florida and West Indies and Central America with rhizome densely clad in grown hairs. |
| ~ climbing fern | any of several ferns of the genus Lygodium that climb by twining. |
| ~ mohria caffrorum, scented fern | sweetly scented African fern with narrow bipinnate fronds. |
| ~ aquatic fern, water fern | ferns that grow in water. |
| ~ adder's tongue, adder's tongue fern | ferns with fertile spikes shaped like a snake's tongue. |
| ~ grape fern | a fern of the genus Botrychium having a fertile frond bearing small grapelike clusters of spore cases. |
| ~ flowering fern, helminthostachys zeylanica | Australasian fern with clusters of sporangia on stems of fertile fronds. |
| ~ class filicinae, class filicopsida, filicinae, filicopsida | ferns. |
| ~ diplopterygium longissimum, giant scrambling fern | large scrambling fern forming large patches to 18 feet high; Pacific region and China. |
| ~ fan fern, gleichenia flabellata, sticherus flabellatus, umbrella fern | large Australasian fern with fanlike repeatedly forked fronds; sometimes placed in genus Gleichenia. |
| ~ polypody | any of numerous ferns of the genus Polypodium. |
| ~ aglaomorpha meyeniana, bear's-paw fern | epiphytic fern with large fronds; Taiwan and Philippines. |
| ~ strap fern | fern with long narrow strap-shaped leaves. |
| ~ drynaria rigidula, basket fern | giant epiphytic or lithophytic fern; Asia to Polynesia and Australia. |
| ~ lecanopteris | any of several bizarre ferns of the genus Lecanopteris having swollen hollow rhizomes that provide homes for symbiotic ants. |
| ~ microgramma-piloselloides, snake polypody | epiphytic ferns with long rhizomes; tropical America. |
| ~ climbing bird's nest fern, microsorium punctatum | tropical Africa to Australasia and Polynesia. |
| ~ golden polypody, phlebodium aureum, polypodium aureum, rabbit's-foot fern, serpent fern | tropical American fern with brown scaly rhizomes cultivated for its large deeply lobed deep bluish-green fronds; sometimes placed in genus Polypodium. |
| ~ staghorn fern | any of various tropical ferns of the genus Platycerium having large flat lobed fronds often resembling the antlers of a stag. |
| ~ cyclophorus lingua, felt fern, pyrrosia lingua, tongue fern | east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus. |
| ~ solanopteris bifrons, potato fern | small epiphytic fern of South America with tuberous swellings along rhizomes. |
| ~ grass fern, vittaria lineata, ribbon fern | epiphytic fern found in lowland forests of tropical America. |
| ~ spleenwort | any of various chiefly rock-inhabiting ferns of the genus Asplenium. |
| ~ asplenium nidus, bird's nest fern | tropical Old World or Australian epiphytic fern frequently forming tufts in tree crotches. |
| ~ asplenium scolopendrium, phyllitis scolopendrium, hart's-tongue, hart's-tongue fern | Eurasian fern with simple lanceolate fronds. |
| ~ asplenium ceterach, ceterach officinarum, scale fern, scaly fern | small European fern with chaffy leathery fronds. |
| ~ asplenium nigripes, schaffneria nigripes, scolopendrium nigripes | a fern of the genus Schaffneria. |
| ~ scolopendrium | a fern thought to resemble a millipede. |
| ~ hard fern | any of several ferns of the genus Blechnum. |
| ~ doodia, rasp fern | any fern of the genus Doodia having pinnate fronds with sharply dentate pinnae. |
| ~ chain fern | a fern of the genus Woodwardia having the sori in chainlike rows. |
| ~ tree fern | any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae. |
| ~ davallia | any fern of the genus Davallia; having scaly creeping rhizomes. |
| ~ boulder fern, dennstaedtia punctilobula, hay-scented, hay-scented fern, scented fern | fern of eastern North America with pale green fronds and an aroma like hay. |
| ~ pasture brake, pteridium aquilinum, bracken, brake | large coarse fern often several feet high; essentially weed ferns; cosmopolitan. |
| ~ bracken, pteridium esculentum | fern of southeastern Asia; not hardy in cold temperate regions. |
| ~ culcita dubia, false bracken | resembles Pteridium aquilinum; of Queensland, Australia. |
| ~ buckler fern, shield fern | any of various ferns of the genera Dryopteris or Polystichum or Lastreopsis having somewhat shield-shaped coverings on the sori. |
| ~ wood-fern, wood fern, woodfern | any of various ferns of the genus Dryopteris. |
| ~ athyrium filix-femina, lady fern | most widely grown fern of the genus Athyrium for its delicate foliage. |
| ~ athyrium pycnocarpon, diplazium pycnocarpon, glade fern, narrow-leaved spleenwort, silvery spleenwort | North American fern with narrow fronds on yellowish leafstalks. |
| ~ cyrtomium aculeatum, polystichum aculeatum, holly fern | tropical Old World fern having glossy fronds suggestive of holly; sometimes placed in genus Polystichum. |
| ~ bladder fern | any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori. |
| ~ athyrium thelypteroides, deparia acrostichoides, silvery spleenwort | fern with elongate silvery outgrowths enclosing the developing spores. |
| ~ gymnocarpium dryopteris, oak fern, thelypteris dryopteris | bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere. |
| ~ gymnocarpium robertianum, limestone fern, northern oak fern | yellow-green fern of rocky areas of northern hemisphere. |
| ~ fiddlehead, matteuccia struthiopteris, onoclea struthiopteris, ostrich fern, pteretis struthiopteris, shuttlecock fern | tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes. |
| ~ hart's-tongue, hart's-tongue fern, olfersia cervina, polybotria cervina, polybotrya cervina | tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya. |
| ~ bead fern, onoclea sensibilis, sensitive fern | beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europe; pinnately divided fronds show a slight tendency to fold when touched; pinnules enclose groups of sori in beadlike lobes. |
| ~ canker brake, christmas fern, dagger fern, evergreen wood fern, polystichum acrostichoides | North American evergreen fern having pinnate leaves and dense clusters of lance-shaped fronds. |
| ~ holly fern | any of various ferns of the genus Polystichum having fronds with texture and gloss like holly. |
| ~ leatherleaf fern, polystichum adiantiformis, rumohra adiantiformis, ten-day fern, leather fern | widely distributed fern of tropical southern hemisphere having leathery pinnatifid fronds. |
| ~ tectaria cicutaria, button fern | Jamaican fern having round buttonlike bulbils. |
| ~ indian button fern, tectaria macrodonta | fern of tropical Asia having round buttonlike bulbils. |
| ~ woodsia | any fern of the genus Woodsia. |
| ~ oleander fern, oleandra mollis, oleandra neriiformis | tropical fern having leathery fronds resembling oleander; found from Asia to Polynesia. |
| ~ sword fern | any of several tropical ferns having more or less sword-shaped fronds including one from which the Boston fern developed. |
| ~ acrostichum aureum, leather fern, golden fern | stout tropical swamp fern (especially tropical America) having large fronds with golden yellow sporangia covering the undersides. |
| ~ maidenhair, maidenhair fern | any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds. |
| ~ annual fern, anogramma leptophylla, jersey fern | small short-lived fern of Central and South America. |
| ~ lip fern, lipfern | any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions. |
| ~ cheilanthes gracillima, lace fern | small tufted fern of northwestern America. |
| ~ bamboo fern, coniogramme japonica | fast-growing sturdy Japanese fern; cultivated for their attractive broad dark-green pinnate fronds. |
| ~ rock brake | dwarf deciduous lithophytic ferns. |
| ~ doryopteris pedata, hand fern | tropical American fern with coarsely lobed to palmatifid fronds. |
| ~ cliff-brake, cliff brake, rock brake | any of several small lithophytic ferns of tropical and warm temperate regions. |
| ~ button fern, pellaea rotundifolia | fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets. |
| ~ pityrogramma argentea, silver fern | fern of southern tropical Africa having fronds with white undersides. |
| ~ pityrogramma calomelanos, silver fern | tropical American fern having fronds with white undersides. |
| ~ golden fern, pityrogramma calomelanos aureoflava | tropical American fern having fronds with light golden undersides. |
| ~ gold fern, pityrogramma chrysophylla | fern of West Indies and South America having fronds with bright golden-yellow undersides. |
| ~ brake | any of various ferns of the genus Pteris having pinnately compound leaves and including several popular houseplants. |
| ~ pteris cretica | cultivated in many varieties as houseplants. |
| ~ pteris multifida, spider brake, spider fern | Asiatic fern introduced in America. |
| ~ pteris serrulata, ribbon fern, spider fern | fern of North Africa and Azores and Canary Islands. |
| ~ marattia salicina, potato fern | large Australasian evergreen fern with an edible rhizome sometimes used as a vegetable by indigenous people. |
| ~ dryopteris thelypteris, marsh fern, thelypteris palustris | fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions. |
| ~ christella | any of several tropical ferns of the genus Christella having thin brittle fronds. |
| ~ dryopteris oreopteris, mountain fern, oreopteris limbosperma | common European mountain fern having fragrant lemon or balsam scented fronds. |
| ~ dryopteris noveboracensis, new york fern, parathelypteris novae-boracensis | slender shield fern of moist woods of eastern North America; sometimes placed in genus Dryopteris. |
| ~ massachusetts fern, parathelypteris simulata, thelypteris simulata | delicate feathery shield fern of the eastern United States; sometimes placed in genus Thelypteris. |
| ~ beech fern | any fern of the genus Phegopteris having deeply cut triangular fronds. |
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