Aristid Lindenmayer was an Hungarian biologist. In 1968 he developed a formal language that is today called L-systems or Lindenmayer Systems. Using those systems Lindenmayer modelled the behaviour of cells of plants. L-systems nowadays are also used to model whole plants. Wikipedia
The definitive Wikipedia entry for Aristid Lindenmayer. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Aristid_Lindenmayer