| Name | Description | Type | Package | Framework |
| FixedPlantsDefinitions | All definitions used in the lsys package are stored in this class. | Class | org.jscience.biology.lsystems.fixed | JScience |
| LSystem | This class represents an LSystem as we know it in text form. | Class | org.jscience.biology.lsystems.fixed | JScience |
| Rule | To represent a rule of an LSystem containing a predecessor a successor and a probability this class may be used. | Class | org.jscience.biology.lsystems.fixed | JScience |
| Turtle | This class is responsible for all the drawing of the LSystem. | Class | org.jscience.biology.lsystems.fixed | JScience |