Mathematical Digest

Short Summaries of Articles about Mathematics
in the Popular Press

"Leaves by number," by Christopher Surridge. Nature, 20 November 2003.

Surridge gives an overview and illustration of how Fibonacci numbers appear inplants and summarizes the article by Didler Reinhardt et al ("Regulation ofphyllotaxis by polar auxin transport," published in the same issue). Theresearchers present the role the plant hormone auxin plays in phyllotaxis (thepositioning of leaves around a stem), the "mechanism by which Fibonacci numberscan emerge."

--- Annette Emerson