The green umbrellas you see in the woods right now are May Apples. They only produce a flower on the plants with a double umbrella. The flowers sprout at the "Y" where the umbrellas join and hide beneath them, bowing their heads toward the ground.
The flowers appear in May, then the seed pods form in their place looking like a green "apple." Hence the May Apple name.
Take a peek under the umbrellas and you'll see them blooming now in western Pennsylvania.
(photo by Dianne Machesney)