Maximianus. AD 286-310. AE folles. Rome mint, struck AD 299. 

IMP C MAXIMIANVS P F AVG, laureate head right.
GENIO POPVLI ROMANI, Genius, modius on head, naked but for chlamys over left shoulder, standing left, holding patera and cornucopiae.

Mintmark S star. 

RIC VI Rome 94b; Sear 13255.