This plant is growing in the backyard on its own, 1.5 foot tall now, blooming (May-June) now, has pink flowers growing in a bunch or cluster. Leaves thin and long. Faint fragrance is there. It seems to be seeding itself as I see another plant nearby.
Each flower in the cluster has four petals. It looks like there will be about 30-40 flowers in a bunch.
The best research I have done tells me that this is Dame's Rocket and that this is considered a noxious weed, not-native to California, USA (SF bay area). Can someone confirm? If so, I will get rid of this right away.