Moenchia erecta

About

Moenchia erecta, the erect chickweed or upright chickweed, is a small annual plant in the family Caryophyllaceae. It can grow to over 10 cm in height, but it is usually smaller. It has blue-green glaucous leaves, and small, delicate white flowers. The sepals are longer than the petals, green and bordered in white. The plant is a common pasture weed native to Europe. It has been introduced elsewhere, including Australia and western North America, but it is not particularly invasive or competitive.

Summary from Wikipedia