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 Private Life of Plants part of "The Life Collection". The extra features include a promotional interview for the series given by David Attenborough on the BBC children's series "Blue Peter", and a 'behind the scenes' vignette. The accompanying book, "The Private Life of Plants" by David Attenborough (), was published by BBC Books on 8 December 1994. The Private Life of Plants The Private Life of Plants is a BBC nature documentary series written and presented by David Attenborough, first shown in the United Kingdom from 11 January 1995. A study of the growth, movement, reproduction and survival of plants, it was the second