Linda thought it was chionodoxa and Tabor suggested Scilla siberica.
I looked them both up--very similar plants. Some botanists do not even acknowledge them as a separate genus, although others do. What cannot be seen in the pictures (I am not much of a photographer) is that the stamens in the plants that I saw are flattened and form a tube. That suggests that they are chionodoxa, also called "Glory-of-the-snow." I am sure that they escaped from a nearby garden. Some may just escape from the roadside and into my garden.
Walking in the woods and fields is now officially over for me. I pulled a tick off my grandson's chest during a bath after a walk in the field behind our house and Mike pulled one off his own leg. I'm sure that I got to Dane's quickly, but Mike's bite spread over his whole inner thigh. I'm hoping they were not deer ticks because they were fairly large. How many different kinds of ticks are there? More detective work needed. I may be on the coputer all day.