"L" Systems for Branching Weeds

These branching weeds were generated as applications of L-systems, starting with the axiom, using the string replacement rules listed next to each corresponding figure, and making turns according to the angle specified. All symbols are replaced simultaneously; those without replacement rules are retained unaltered. The symbols are interpreted as in "Turtle Graphics":

Symbol Interpretation
B F G X move and draw line
+ turn to the left
- turn to the right
[ begin side branch
] end side branch

Twisted twig Scaled twig Needled twig Grass seed Woody weed Standing bush Leaning bush
©2001 Department of Redundancy Department