This collection is a key resource in our understanding of plant evolution and biodiversity.

He continued to publish widely and extensively on plant evolution, writing over 200 papers and several books after 1950.

The pattern in plant evolution has been a shift from homomorphy to heteromorphy.

Tim, "was to tell the story of plant evolution, where possible using live plants."

The absence of dicotyledons suggests that plant evolution was still at an early stage.

But again they are an ancient group with ancestors back in the Carboniferous forest, a melting pot for plant evolution.

It has been of major significance in plant evolution according to Stebbins.

Flowers were a significant development in plant evolution.

The next landmark in plant evolution was the appearance of seed plants, called gymnosperms, about 425 million years ago.

Actually, these plants deserve respect and admiration as living relics of a major turning point in plant evolution eons ago.