Massive database of 182,000 leaves is helping predict plants' family trees

Massive database of 182,000 leaves is helping predict plants' family trees

The story of a plant is etched in its leaves. A tree growing in a cold environment with plenty of water is more likely to have large leaves with many serrated teeth around the edges. But if the same species lives in a warm, dry region, its leaves are likely to be smaller and smoother.