Yoda Posted January 28, 2019 Share Posted January 28, 2019 I see a fair amount mentioned online about seed ferns. How did these differ from modern day spore bearing ferns? Where these seed ferns true ferns? MotM August 2023 - Eclectic Collector Link to comment Share on other sites More sharing options...
DPS Ammonite Posted January 28, 2019 Share Posted January 28, 2019 Seeds are multicellular with a food supply and a protective coat for the embryonic plant. Spores have to develope into an embryonic plant; have no protective coat or food supply. Seed ferns may not have been true ferns but were seed plants with fern like foliage. https://en.m.wikipedia.org/wiki/Pteridospermatophyta 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Yoda Posted January 28, 2019 Author Share Posted January 28, 2019 I have quite a big fern collection in my garden and some tropical species in a greenhouse. Have grown a lot of them from spore So am interested to see where the seed ferns fit in the evolutionary picture. MotM August 2023 - Eclectic Collector Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted January 28, 2019 Share Posted January 28, 2019 This gives a rough idea : (from The Seed Biology Place - Royal Holloway University of London. ) 3 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Yoda Posted January 29, 2019 Author Share Posted January 29, 2019 @Tidgy's Dad Thanks for that. From a bit more reading last night....it seems the seed ferns are somewhere in between true ferns and cycads? 1 MotM August 2023 - Eclectic Collector Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted January 29, 2019 Share Posted January 29, 2019 8 hours ago, Yoda said: @Tidgy's Dad Thanks for that. From a bit more reading last night....it seems the seed ferns are somewhere in between true ferns and cycads? That seems to be the current understanding of the majority it would seem, yes. Edit : Or maybe not. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
paleoflor Posted January 29, 2019 Share Posted January 29, 2019 8 hours ago, Yoda said: @Tidgy's Dad Thanks for that. From a bit more reading last night....it seems the seed ferns are somewhere in between true ferns and cycads? Not really, though this was thought by early researchers (so you might encounter literature in this direction). The "seed ferns" or "pteridosperms" are all gymnosperms, and only distantly related to ferns. Moreover, the "pteridosperms" form a polyphyletic group, including various gymnosperm orders (e.g. Lyginopteridales, Medullosales, Peltaspermales, Callistophytales and Umkomasiales). For many of these groups of plants, their systematic relationships within the gymnosperms are still uncertain. 2 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Yoda Posted January 30, 2019 Author Share Posted January 30, 2019 I have just ordered a book on fossil plants. Smithsonian publication So will be interesting to see what is said in there MotM August 2023 - Eclectic Collector Link to comment Share on other sites More sharing options...
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