Ferns and fern allies?

1what is the difference between pterophyte and pteridophyte?

2. what is the difference between synangium from a strobilus?

3. what are the intermediate caracters of ferns between bryophytes and gymnosperms?



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Ferns and fern allies?
Answer 1 ) -- Pteridophytes are a group of plants that is scientifically divided it to four divisions viz. a ) Psilophyta ( Very primitive pteriodophytes ) b) Lepidophyta; c ) Calamophyta and d) Pterophyta ( Most advanced group that includes ferns and fern allies .



So ferns and their allies are in Pterophyta ; and they are Pteridophytes .

But all Pteridophytes are NOT Pterophytes .



2 ) Synangium == a collection of sporangia , compound sorus .

Strobilus == Compact arrangement of sporophylls



3 ) The gametophyte and the sporophyte generation in ferns are independent