Editing Seed (section)

=== Evolution and origin of seeds ===
The issue of the origin of seed plants remains unsolved. However, more and more data tends to place this origin in the middle [[Devonian]]. The description in 2004 of the proto-seed ''Runcaria heinzelinii'' in the [[Givetian]] of [[Belgium]] is an indication of that ancient origin of seed-plants. As with modern ferns, most land plants before this time reproduced by sending into the air [[spore]]s that would land and become whole new plants.

Taxonomists have described early "true" seeds from the upper Devonian, which probably became the theater of their true first [[evolutionary radiation]]. With this radiation came an [[evolution of seed size]], shape, dispersal and eventually the radiation of gymnosperms and angiosperms and [[monocotyledon]]s and [[dicotyledon]]s. Seed plants progressively became one of the major elements of nearly all ecosystems.