This photo was taken in mixed lighting - fluorescent and natural through window. A cluster of Indian pipe had been brought to us by an outdoorsman. This image may represent a pollinated flower, and all the Indian pipe in this cluster had progressed to standing upright.
Monotropa uniflora, also known as the Ghost Plant, Indian Pipe, or Corpse Plant is a herbaceous perennial plant, formerly classified in the family Monotropaceae, but now included within the Ericaceae: http://en.wikipedia.org/wiki/Monotropa_uniflora
see also: http://www.fcps.edu/islandcreekes/ecology/indian_pipe.htm