Does the little hood fold over at first?
The hood or "umbrella" is not the flower. You will find the flowers on the little central stalk that you call "Jack." See whether the blossoms are alike. Look at the blossoms on several plants. Place a stick by the side of one of these plants so that you will know it later in the year when the Jack-in-the-pulpit has disappeared.
Notice whether there are insects in the lower part of the flower stalk. If so, can they get out?
When the blossom has gone, look for the seeds. What color are they in June? In August?
Have you any house plant that you think is related to Jack-in-the-pulpit?
Fig. 313. Tubers of Jack-in-the-pulpit, or Indian turnip.