One of the Silene sp., I think...
Can Dianthus sp. escape in Portland?!? Crazy!
Some kind of chickweed
The Caryophyllaceae, commonly called the pink family or carnation family, are a family of flowering plants. It is included in the dicotyledon order Caryophyllales in the APG III system, alongside 33 other families, including Amaranthaceae, Cactaceae, and Polygonaceae. It is a large family, with 86 genera and some 2,200 species.