I'm not really sure what I'm looking at. Could you take a closer picture of the plants? Right now they kind of look like violets, but it's not clear.

Are you questioning the grass in the garden? It could be nutsedge. All I can do is pull it. and pull it, and pull it. Every part of the plant will grow again.

Focus a spray of Round Up on it, avoid any drift, and you might master it.

You say "tuber". Show a picture of the tuber. Isolate one plant to a picture, show root system. That my help us.