It looks like a type of annual phlox to me. I know I've seen the plant before and I'm thinking it was the wild phlox on Vancouver Island.

Syreeta

Hello
I think silver plant or money plant

Shanti

Thank you Shanti..that is it!...I started some from seed last year and mulched over winter..they looked like they had rotted so I removed two of them and left this one as it had one green leaf..and then promptly forgot about it after planting out other plants around it..lol..another good reason to draw up a planting map...savona

Are there five petals, and the bud petals twisty-fold on themselves? Leaves opposite? All characteristics of Phlox spp.

Rick