Linaria purpurea. It's fallen and it can't get up. They need staking in my yard, too. Comes back every year and spreads by seed. Some may call it a little aggressive, I love it. and it is easy to move.
Laurie
It does look like lavender, did you buy it as a generic lavender or see it growing somewhere? If there's any doubt it's a lavender there's always the smell test.
Oglebrandy. There are lots of different lavenders, it may be difficult to be precise. Check out Lavandula in the NGA database here:
