Aristid Lindenmayer was a
swedish biologist who lived from
1925-
1989. In
1968 Lindenmayer developed a
formal language that are today called
L-Systems or Lindenmayer Systems. Using those systems Lindenmayer modelled the growth of plants.
Aristid Lindenmayer, "Mathematical models for cellular interaction in development." J. Theoret. Biology, 18:280--315, 1968.