It seems whenever I bring up Obedient Plant someone always reminds me, "Obedient Plant is not obedient!"   It is a member of the mint family, and it does love to spread. 
 
     Try, though, pushing a bloom from one side of the stem to the other.  The bloom stays where you place it.  That's obedient!
 
     It's also beautiful, with pink and purple blooms August through November attracting hummingbirds, native bees and other pollinators.  I have a bunch of Obedient Plant in my garden, and my neighbors always want to know what it is.
 
     Photos: Creative Commons