http://cactiguide.com/cactiornot/
....I have heard the term used to describe a varied range of plants from Euphorbia's to Fonquieria's (Ocotillo) to Agave's, Yucca's, & Aloe's.
....I have heard the term used to describe a varied range of plants from Euphorbia's to Fonquieria's (Ocotillo) to Agave's, Yucca's, & Aloe's.