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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
    Ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (land plants with vascular tissues such as xylem and phloem) that reproduce via spores and have neither seeds nor flowers
  • 30 Different Types of Ferns (with Pictures) - Plantglossary
    Ferns are one of the oldest types of plants on the planet, with fern fossils dating back as far as 360 million years There are a huge range of ferns still alive today, growing in a variety of climates and habitats all over the world
  • 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
  • FERN Definition Meaning - Merriam-Webster
    The meaning of FERN is any of a division (Polypodiophyta) or class (Polypodiopsida) of flowerless spore-producing vascular plants having alternating sporophyte and gametophyte generations; especially : any of an order (Polypodiales) of homosporous plants possessing roots, stems, and leaflike fronds
  • fern - YouTube
    We just covered the life story of a legendary FBI undercover agent, and there’s much more on the way Two highlights: we investigated a doomsday cult, and we sent a reporter to examine a massive
  • Ferns - US Forest Service
    Ferns are an outstanding part of the native flora Once you start to look for them among the wildflowers you will discover what some of us have long known: ferns are fascinating and beautiful Usually people focus on the showy wildflowers and do not pay attention to the ferns
  • 35 Types of Fern to Freshen Up Your Home or Garden - The Spruce
    With approximately 10,000 different species, ferns come in various sizes, shapes, and growth patterns, commonly thriving in shady, moist environments These perennials can be evergreen or deciduous and propagate through spores found on their fronds
  • Hardy Fern Foundation | Fern Collection and Study Garden | Federal Way, WA
    Learn about ferns and their suitability to your garden from our Fern Database All Hardy Fern Foundation members have access to our spore exchange and can choose from a wide variety of ferns
  • Winter Storm Fern Maps Tracker: Alerts, Radar, Snowfall And Ice . . .
    Winter Storm Fern Maps Tracker: Alerts, Radar, Snowfall And Ice Forecast And More Track everything from current conditions, forecast timing and potential impacts from the winter storm here
  • Winter Storm Fern Slamming South, East | Weather. com
    Heavy snow, sleet and freezing rain are falling from Texas to Kentucky Ultimately, more than 220 million people could be affected by Winter Storm Fern More than a dozen states issued states of





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