Aristid Lindenmayer (1925-1989) was a Swedishbiologist. In 1968 he developed a formal language that is today called L-Systems or Lindenmayer Systems. Using those systems Lindenmayer modelled the growth of plants.
Publications
Aristid Lindenmayer, "Mathematical models for cellular interaction in development." J. Theoret. Biology, 18:280--315, 1968.