C&O Canal near Williamsport, MD

Today we enjoyed a rainy day walk along the C & O Canal with some of our friends. Below is a link to a photo album of that day.

C & O Canal

During the afternoon we saw this flower several times. I have been searching my flower books and the internet trying to identify it, but have had no luck so far. Does anyone recognize it?

***Update***Thanks to the research of Danny's mother I now have the name of the flowers. ~ Thank you!

Ornithogalum nutans