Abstract: Systems, devices, and methods are disclosed for pen that distributes viscous plant material, such as rosin, from a cartridge. The pen receives, from a button, input corresponding to a first control instruction. The pen has a motor configured to receive the first control instruction from the controller and, in response, drive a spindle that linearly displaces a plunger, wherein the linear displacement of the plunger causes plant material to be pushed out of a nozzle of the pen. The pen cartridge includes a rubber plug configured to be linearly displaced by the plunger to cause rosin to be disturbed from the cartridge.