| 单词 | nonflowering plant |
| 释义 | nonflowering plant (extremely rare) n WORD FAMILY nonflowering plant n plants having vascular tissue and reproducing by spores Syn|Hypo|Hyper pteridophyte fern any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores fern allypteridophytes of other classes than Filicopsida pecopterisCarboniferous fossil fern characterized by a regular arrangement of the leaflets resembling a comb film fern, filmy fernany fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves bristle fern, filmy fernany fern of the genus Trichomanes having large pinnatifid often translucent fronds; most are epiphytic on tree branches and twigs or terrestrial on mossy banks flowering fern, osmundany fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters Leptopteris superba, Prince-of-Wales feather, Prince-of-Wales fern, Prince-of-Wales plume, Todea superba, crape fernNew Zealand with pinnate fronds and a densely woolly stalks; sometimes included in genus Todea Todea barbara, crepe fern, king fernfern of rain forests of tropical Australia and New Zealand and South Africa Schizaea pusilla, curly grass, curly grass fernrare small fern of northeastern North America having numerous slender spiraling fronds and forming dense tufts Anemia adiantifolia, pine fernfern of Florida and West Indies and Central America with rhizome densely clad in grown hairs climbing fernany of several ferns of the genus Lygodium that climb by twining Mohria caffrorum, scented fernsweetly scented African fern with narrow bipinnate fronds aquatic fern, water fernferns that grow in water adder's tongue, adder's tongue fernferns with fertile spikes shaped like a snake's tongue grape ferna fern of the genus Botrychium having a fertile frond bearing small grapelike clusters of spore cases Helminthostachys zeylanica, flowering fernAustralasian fern with clusters of sporangia on stems of fertile fronds Diplopterygium longissimum, giant scrambling fernlarge scrambling fern forming large patches to 18 feet high; Pacific region and China Gleichenia flabellata, Sticherus flabellatus, fan fern, umbrella fernlarge Australasian fern with fanlike repeatedly forked fronds; sometimes placed in genus Gleichenia polypodyany of numerous ferns of the genus Polypodium Aglaomorpha meyeniana, bear's-paw fernepiphytic fern with large fronds; Taiwan and Philippines strap fernfern with long narrow strap-shaped leaves Drynaria rigidula, basket ferngiant epiphytic or lithophytic fern; Asia to Polynesia and Australia lecanopterisany of several bizarre ferns of the genus Lecanopteris having swollen hollow rhizomes that provide homes for symbiotic ants Microgramma-piloselloides, snake polypodyepiphytic ferns with long rhizomes; tropical America Microsorium punctatum, climbing bird's nest ferntropical Africa to Australasia and Polynesia Phlebodium aureum, Polypodium aureum, golden polypody, rabbit's-foot fern, serpent ferntropical American fern with brown scaly rhizomes cultivated for its large deeply lobed deep bluish-green fronds; sometimes placed in genus Polypodium staghorn fernany of various tropical ferns of the genus Platycerium having large flat lobed fronds often resembling the antlers of a stag Cyclophorus lingua, Pyrrosia lingua, felt fern, tongue ferneast Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus Solanopteris bifrons, potato fernsmall epiphytic fern of South America with tuberous swellings along rhizomes Vittaria lineata, grass fern, ribbon fernepiphytic fern found in lowland forests of tropical America spleenwortany of various chiefly rock-inhabiting ferns of the genus Asplenium Asplenium nidus, bird's nest ferntropical Old World or Australian epiphytic fern frequently forming tufts in tree crotches Asplenium scolopendrium, Phyllitis scolopendrium, hart's-tongue, hart's-tongue fernEurasian fern with simple lanceolate fronds Asplenium ceterach, Ceterach officinarum, scale fern, scaly fernsmall European fern with chaffy leathery fronds Asplenium nigripes, Schaffneria nigripes, Scolopendrium nigripesa fern of the genus Schaffneria scolopendriuma fern thought to resemble a millipede hard fernany of several ferns of the genus Blechnum doodia, rasp fernany fern of the genus Doodia having pinnate fronds with sharply dentate pinnae chain ferna fern of the genus Woodwardia having the sori in chainlike rows tree fernany 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 davalliaany fern of the genus Davallia; having scaly creeping rhizomes Dennstaedtia punctilobula, boulder fern, hay-scented, hay-scented fern, scented fernfern of eastern North America with pale green fronds and an aroma like hay Pteridium aquilinum, bracken, brake, pasture brakelarge coarse fern often several feet high; essentially weed ferns; cosmopolitan Pteridium esculentum, brackenfern of southeastern Asia; not hardy in cold temperate regions Culcita dubia, false brackenresembles Pteridium aquilinum; of Queensland, Australia buckler fern, shield fernany of various ferns of the genera Dryopteris or Polystichum or Lastreopsis having somewhat shield-shaped coverings on the sori wood fern, wood-fern, woodfernany of various ferns of the genus Dryopteris Athyrium filix-femina, lady fernmost widely grown fern of the genus Athyrium for its delicate foliage Athyrium pycnocarpon, Diplazium pycnocarpon, glade fern, narrow-leaved spleenwort, silvery spleenwortNorth American fern with narrow fronds on yellowish leafstalks Cyrtomium aculeatum, Polystichum aculeatum, holly ferntropical Old World fern having glossy fronds suggestive of holly; sometimes placed in genus Polystichum bladder fernany fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori Athyrium thelypteroides, Deparia acrostichoides, silvery spleenwortfern with elongate silvery outgrowths enclosing the developing spores Gymnocarpium dryopteris, Thelypteris dryopteris, oak fernbright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere Gymnocarpium robertianum, limestone fern, northern oak fernyellow-green fern of rocky areas of northern hemisphere Matteuccia struthiopteris, Onoclea struthiopteris, Pteretis struthiopteris, fiddlehead, ostrich fern, shuttlecock ferntall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes Olfersia cervina, Polybotria cervina, Polybotrya cervina, hart's-tongue, hart's-tongue ferntropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya Onoclea sensibilis, bead fern, sensitive fernbeautiful 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 Christmas fern, Polystichum acrostichoides, canker brake, dagger fern, evergreen wood fernNorth American evergreen fern having pinnate leaves and dense clusters of lance-shaped fronds holly fernany of various ferns of the genus Polystichum having fronds with texture and gloss like holly Polystichum adiantiformis, Rumohra adiantiformis, leather fern, leatherleaf fern, ten-day fernwidely distributed fern of tropical southern hemisphere having leathery pinnatifid fronds Tectaria cicutaria, button fernJamaican fern having round buttonlike bulbils Indian button fern, Tectaria macrodontafern of tropical Asia having round buttonlike bulbils woodsiaany fern of the genus Woodsia Oleandra mollis, Oleandra neriiformis, oleander ferntropical fern having leathery fronds resembling oleander; found from Asia to Polynesia sword fernany of several tropical ferns having more or less sword-shaped fronds including one from which the Boston fern developed Acrostichum aureum, golden fern, leather fernstout tropical swamp fern (especially tropical America) having large fronds with golden yellow sporangia covering the undersides maidenhair, maidenhair fernany of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds Anogramma leptophylla, Jersey fern, annual fernsmall short-lived fern of Central and South America lip fern, lipfernany of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions Cheilanthes gracillima, lace fernsmall tufted fern of northwestern America Coniogramme japonica, bamboo fernfast-growing sturdy Japanese fern; cultivated for their attractive broad dark-green pinnate fronds rock brakedwarf deciduous lithophytic ferns Doryopteris pedata, hand ferntropical American fern with coarsely lobed to palmatifid fronds cliff brake, cliff-brake, rock brakeany of several small lithophytic ferns of tropical and warm temperate regions Pellaea rotundifolia, button fernfern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets Pityrogramma argentea, silver fernfern of southern tropical Africa having fronds with white undersides Pityrogramma calomelanos, silver ferntropical American fern having fronds with white undersides Pityrogramma calomelanos aureoflava, golden ferntropical American fern having fronds with light golden undersides Pityrogramma chrysophylla, gold fernfern of West Indies and South America having fronds with bright golden-yellow undersides brakeany of various ferns of the genus Pteris having pinnately compound leaves and including several popular houseplants Pteris creticacultivated in many varieties as houseplants Pteris multifida, spider brake, spider fernAsiatic fern introduced in America Pteris serrulata, ribbon fern, spider fernfern of North Africa and Azores and Canary Islands Marattia salicina, potato fernlarge Australasian evergreen fern with an edible rhizome sometimes used as a vegetable by indigenous people whisk fernchiefly tropical clump-forming plants of skeletal appearance resembling whisk brooms; lacking roots horsetailperennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America club moss, club-moss, lycopodprimitive evergreen moss-like plant with spores in club-shaped strobiles quillwortany of several spore-bearing aquatic or marsh plants having short rhizomes and leaves resembling quills; worldwide except Polynesia Dryopteris thelypteris, Thelypteris palustris, marsh fernfern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions christellaany of several tropical ferns of the genus Christella having thin brittle fronds Dryopteris oreopteris, Oreopteris limbosperma, mountain ferncommon European mountain fern having fragrant lemon or balsam scented fronds Dryopteris noveboracensis, New York fern, Parathelypteris novae-boracensisslender shield fern of moist woods of eastern North America; sometimes placed in genus Dryopteris Massachusetts fern, Parathelypteris simulata, Thelypteris simulatadelicate feathery shield fern of the eastern United States; sometimes placed in genus Thelypteris beech fernany fern of the genus Phegopteris having deeply cut triangular fronds tracheophyte, vascular plant green plant having a vascular system: ferns, gymnosperms, angiosperms |
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