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fern    音标拼音: [f'ɚn]
n. 蕨类植物

蕨类植物

fern
n 1: any of numerous flowerless and seedless vascular plants
having true roots from a rhizome and fronds that uncurl
upward; reproduce by spores

Fern \Fern\, adv.
Long ago. [Obs.] --Chaucer.
[1913 Webster]


Fern \Fern\, a. [AS. fyrn.]
Ancient; old. [Obs.] "Pilgrimages to . . . ferne halwes."
[saints]. --Chaucer.
[1913 Webster]


Fern \Fern\ (f[~e]rn), n. [AS. fearn; akin to D. varen, G. farn,
farnkraut; cf. Skr. par[.n]a wing, feather, leaf, sort of
plant, or Lith. papartis fern.] (Bot.)
An order of cryptogamous plants, the {Filices}, which have
their fructification on the back of the fronds or leaves.
They are usually found in humid soil, sometimes grow
epiphytically on trees, and in tropical climates often attain
a gigantic size.
[1913 Webster]

Note: The plants are asexual, and bear clustered sporangia,
containing minute spores, which germinate and form
prothalli, on which are borne the true organs of
reproduction. The brake or bracken, the maidenhair, and
the polypody are all well known ferns.
[1913 Webster]

{Christmas fern}. See under {Christmas}.

{Climbing fern} (Bot.), a delicate North American fern
({Lygodium palmatum}), which climbs several feet high over
bushes, etc., and is much sought for purposes of
decoration.

{Fern owl}. (Zool.)
(a) The European goatsucker.
(b) The short-eared owl. [Prov. Eng.] -- {Fern shaw}, a fern
thicket. [Eng.] --R. Browning.
[1913 Webster]


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  • Fern - Wikipedia
    The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers
  • Fern | Description, Features, Evolution, Taxonomy | Britannica
    Fern, class of several thousand species of nonflowering vascular plants that reproduce by spores Ferns have true roots, stems, and complex leaves and constitute an ancient division of plants Learn about their physical characteristics, life cycle, genetics, evolutionary history, and classification
  • 35 Types of Fern to Freshen Up Your Home or Garden - The Spruce
    There are around 10,000 species of fern from within the Polypodiopsida class with a great variation in size, spread, and shape Many of them are cultivated for use in yards and as houseplants Most are perennial, with some evergreen and others deciduous
  • How to Grow and Care for Ferns - Gardeners Path
    Ferns are plants in the Polypodiopsida class and the Polypodiophyta division of the plant kingdom They’re closely related to club mosses, horsetails, and quillworts With over 20,000 different known species out there, you’re probably wondering what unites all the different ferns of the world
  • How to Grow and Care for Outdoor Ferns - Better Homes Gardens
    Ferns add delicate, feathery texture and tons of green to any garden bed All you need is dappled shade, some plants to get the colonies started, and enough moisture to encourage ferns to grow Here's what you need to know to start your own fern garden
  • 18 Different Types of Ferns (with Pictures) - Plantglossary
    A fern plant is a type of plant that reproduces via spores This means they have no flowers and, therefore no seeds ‘Fern’ is the more common name for this group of plants, which is botanically known as ‘polypodiophyta’
  • Native Ferns: A Beginner’s Guide - The Plant Native
    Lady Fern With lacy fronds and an easygoing disposition, lady fern is a great fern for the garden It likes shade and moist soil, but can tolerate drier soils than many other ferns It will slowly spread over time and can be easily divided Unusually among plants, it is found across three continents (North America, Europe, and Asia)!
  • What Are Ferns? - US Forest Service
    Ferns are plants that do not have flowers Ferns generally reproduce by producing spores Similar to flowering plants, ferns have roots, stems and leaves
  • Fern 101: How to Care for Ferns - Bloomscape
    Learn how to care for Fern plants With guides for watering, lighting, humidity, and more, we have the care info you need to grow healthy indoor plants
  • Ferns - Native Plants PNW
    Ferns are like flowering plants in that they have true leaves and a vascular system to transport water and nutrients But they do not produce seeds Instead, they have a complex life cycle consisting of two alternate generations The diploid sporophyte generation is the one we recognize as a fern





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