cactophile

noun2

1. •
   A person who is especially fond of cacti.

   • As a group they present all of the challenges in collecting, classifying, and culturing cacti which the most ardent cactophile can desire. — 1984
2. •
   An animal which lives in or feeds on cacti.

   • Other insects are cactophiles, including Homoptera such as the cactus dodger (Cacama valvata) […] — 1985