Cerastium brachypodum (Engelm. ex A.Gray) B.L.Rob.
Family: Caryophyllaceae
short-stalk chickweed, short-stalked mouse-ear chickweed
[Cerastium adsurgens Greene,  more...]
Cerastium brachypodum image
from USDA Plants website  
Etymology: Cerastium: from Greek keras, "a horn," referring to the shape of the seed capsule
Plants: perennial forb