Small Jack-in-the-pulpit (Arisaema tryphyllum pusillum)
2012-3-31 D&M, MD
-leaves are green underneath
-the stripes on the spathe are subtle
the clues not obvious in this picture:
-the flange is less wide and less rolled
-the spadix is cylindrical or slightly more slender at the top.
see also:
http://www.delawarewildflowers.org/plant.php?id=0139