What kind of flowers are they?

Question

I believe they bloomed in late spring early summer. They look like piles of grass like maybe crab grass until they have pretty pinkish flowers that come out. I think they bloom during the day and close at night. they are not morning glories.

Answer 1

It's a plant called Showy Evening Primrose (Oenothera speciosa) a native wildflower to North America.There are also hundreds of other species that look just like it. It's related to Guara and a plant called Willowherb. Are any of these your plant?

The Guara answer is what give me the suspicion that you had an Oenothera species.

Answer 2

My first guess--with what little you said about this flower and not posting a photo--is Gaura lindheimeri

Answer 3

you really need to post a pic. for exact i.d.

Answer 4

sounds like dianthus