I have a small, dense, spreading herbaceous perennial plant in my lawn. I don't have anything against it, but I would like to know what it is. It has slightly square stems and rounded leaves. It has small purple flowers sometimes, and looks a lot like a Prunella when in bloom. It tends to grow in poor, rocky soil where the grass gets thin. enter image description here enter image description here

1 Answer 1


This looks like Ajuga reptans or bugleweed. It has many cultivars and changes its habit depending on the environment. It is six inches tall when in flower. For the rest of the year it is just a few inches high.

This plant does not taste good to deer but is considered invasive in parts of North America.

If it starts getting out of hand you can pull it out by its tap root and fertilize or top dress to encourage the grass to out grow it.

  • This ties with the stem which sounded very like mint-family (Lamiaceae). I've just looked Ajuga reptans up - and yes a member of the Lamiaceae...
    – winwaed
    Jun 19, 2012 at 12:42
  • and like a lot of that family it shares the aggressive growth habits.
    – kevinskio
    Jun 19, 2012 at 13:19
  • Several years ago this seemed like it was going to take over large parts of our lawn - and then it pretty much disappeared. I have no idea why it's gone.
    – Ed Staub
    Jun 19, 2012 at 21:03

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