Field Chickweed (Cerastium arvense)
At first we thought this was Long Stemmed Starwort (in keeping with our June “star” theme). On second glance we believe this to be chickweed. It appears to have ten petals at first, until one sees that each “pair” is actually a deeply lobed single petal, making five. This is closely related to Common Chickweed, whose leaves are known to be edible, but we’re not sure if you can eat this.