/usr/share/k3d/lsystem/tree-base.ls is in k3d-data 0.8.0.3-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
10
10
50
p
p=FF[cag]>(120)[cag]>(120)[cag]>(50)!(0.9)'~(3)p
g=~(3)!'F[cmb][cnb]^(5)g
b=~(3)!'F[cmF][cnF]^(3)b
a=&a
m=+m
n=-n
@
|