I have only seen this plant 2x in Fla where i live and made the mistake of chopping it with a weedeater. There was only one then but as you will see in the pics after the wack the mistake I made: http://www.esnips.com/web/outdoor-Plants
It's Kalanchoe daigremontiana, we get many ID requests for this plant, but I think yours is the first where it is growing outdoors as opposed to a houseplant. Note the little tiny baby plants between the teeth of the leaf margins. That is the source of all the little ones that have spread though your garden.
Thanks a ton. It has grown threw the small frost and has flouished. It hasn't rained much and I haven't watered it thinking it will die off but it just keeps growing. Funny thing is that it came up last year around the summer time and i pulled it up threw it to the side and it started growing upwards and then came the weedeater and just look at it. I figured if I put this pplat through all that and it still wanted to grow I will just let it.