CentralNotice L-system From Wikipedia, the free encyclopedia Jump to: navigation , search This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. (April 2013) L-system trees form realistic models of natural patterns An L-system or Lindenmayer system is a parallel rewriting system and a type of formal grammar . An L-system consists of an alphabet of symbols that can be used to make strings , a collection of production rules that expand each symbol into some larger string of symbols, an initial " axiom " string from which to begin construction, and a mechanism for translating the generated strings into geometric structures. L-systems were introduced and developed in 1968 by Aristid Lindenmayer , a Hungarian theoretical biologist and...