Evolutionary history of plants foliage consisted of fern-like fronds, although they were not closely related to ferns. The oldest fossil evidence of seed plants is of Late Devonian age, and they appear to have evolved out of an earlier group known as the progymnosperms. These early seed plants ranged from trees to small, rambling shrubs; like most early progymnosperms, they were woody plants with fern-like foliage. They all bore ovules, but no cones, fruit or similar. While it is difficult to track the early evolution of seeds, the lineage of the seed ferns may be traced from the simple trimerophytes through homosporous Aneurophytes. This
The Variation of Animals and Plants under Domestication spite of the fact that a considerable number of these assumptions are untenable, a part of the theory still remains which must be accepted as fundamental and correct,--in principle at any rate,--not only now but for all time to come. ... presupposing the existence of material particles in the germ which possess the properties of the living being ... I must honestly confess to having mentally resisted this fundamental point of the Darwinian doctrine for a long time." The Variation of Animals and Plants under Domestication The Variation of Animals and Plants under Domestication is a book by Charles Darwin