Section 7. The mayflower (epigaea repens) shall be the flower or floral emblem of the commonwealth. Any person who pulls up or digs up the plant of the mayflower or any part thereof, or injures such plant or any part thereof except in so far as is reasonably necessary in procuring the flower therefrom, within the limits of any state highway or any other public way or place, or upon the land of another person without written authority from him, shall be punished by a fine of not more than fifty dollars; but if a person does any of the aforesaid acts while in disguise or secretly in the nighttime he shall be punished by a fine of not more than one hundred dollars. The provisions of this section shall be enforced by all officers in the division of law enforcement in the department of fisheries, wildlife and environmental law enforcement.