Evolutionary history of plants and radially symmetrical, is an integumented megasporangium surrounded by a cupule. The megasporangium bears an unopened distal extension protruding above the multilobed integument. It is suspected that the extension was involved in anemophilous pollination. "Runcaria" sheds new light on the sequence of character acquisition leading to the seed. "Runcaria" has all of the qualities of seed plants except for a solid seed coat and a system to guide the pollen to the ovule. The first spermatophytes (literally: "seed plants") – that is, the first plants to bear true seeds – are called pteridosperms: literally, "seed ferns", so called because their
The Secret Life of Plants plants "might originate in a supramaterial world of cosmic beings which, as fairies, elves, gnomes, sylphs, and a host of other creatures, were a matter of direct vision and experience to clairvoyants among the Celts and other sensitives." The book has been criticized by botanists such as Arthur Galston for endorsing pseudoscientific claims. According to Galston and physiologist Clifford L. Slayman many of the claims in the book are false or unsupported by independent verification and replicable studies. Botanist Leslie Audus noted that the book is filled with nonsensical "outrageous" claims and should be regarded as fiction. The book was