Fern

Gametophyte (thalloid green mass) and sporophyte (ascendent frond) of Onoclea sensibilis

Ferns at the Royal Melbourne Botanical Gardens

Tree ferns, probably Dicksonia antarctica, growing in Nunniong, Australia

A fern is a member of a group of about 12,000 species of vascular plants that reproduce via spores and have neither seeds nor flowers. They differ from mosses by being vascular (i.e. having water-conducting vessels). They have branched stems and leaves, like other vascular plants, but these are megaphylls, more complex than the simple microphylls of clubmosses. Most ferns have what are called fiddleheads that expand into fronds, which are each delicately divided.

单词	Pterophytes
释义	Pterophytes 英语百科 Fern A fern is a member of a group of about 12,000 species of vascular plants that reproduce via spores and have neither seeds nor flowers. They differ from mosses by being vascular (i.e. having water-conducting vessels). They have branched stems and leaves, like other vascular plants, but these are megaphylls, more complex than the simple microphylls of clubmosses. Most ferns have what are called fiddleheads that expand into fronds, which are each delicately divided.
随便看	maximum heat release rate的意思 maximum heatrelease rate的意思 maximum heel的意思 maximum heeling angle的意思 maximum heeling moment的意思 maximum height的意思 maximum height area method的意思 maximum height for survival craft的意思 maximum height of car的意思 maximum height of coupler centre的意思 maximum height of lift的意思 maximum height of lifting的意思 maximum height of opening的意思 maximum height of surmountable obstacle的意思 maximum height of the profile的意思 maximum height of workpiece的意思 maximum helix angle的意思 maximum heterogenecity的意思 maximum hip breadth的意思 maximum historical flood的意思 maximum historically probable earthquake的意思 maximum hnmidity的意思 maximum hob diameter的意思 maximum hoist capacity的意思 maximum hoisting height of grab的意思

Pterophytes

Fern