Mysterious Flowers

I have passed these flowers on my bike rides dozens of times.  But today, as I was cycling along, I had on my mind that I hadn't come up with a photo for the blog yet.  The flowers flashed by on my right and I kept going.  Then I thought, "Don't be dumb.  Stop NOW!"  So I turned around and came back.  I always carry my iPhone with me, and that's what I used to take this photograph.  Worth stopping for, right?  Notice how I am not mentioning the kind of flowers these are?  That's because I haven't a clue.   But fortunately I know I have knowledgeable readers, and they will know what flowers these are.