Does anyone know what this plant is? I keep going back to rockcress but the leaf does not look right. It was seen in the Alberta Rockies in July 2019
The flowers look very like Lobularia maritima (a popular garden plant, frequently escapes, can be invasive), but the leaf shape is a bit off for that.
I have Alyssum in my own garden and the flowers are similar but the leaves definitely different. That's it - thank you so much!!