Removing or injuring vegetation; removing downed wood.
It shall be unlawful for any person other than city personnel to
willfully pick, pull, pull up, tear up, dig up, or out, mutilate,
break, bruise, injure, burn, remove, carry away, or destroy any tree,
shrub, plant, vine, flower, moss, foliage, berries, fruit, grass,
turf, humus, cones, or dead or downed wood within city parks, except
by written approval issued by the city manager or designated representative
for scientific or educational purposes.