I must have SEX on my mind as I also gleaned this from Wikipedia: “The flowers are UNISEXUAL, in small plants most if not all the flowers are male, as plants age and grow larger the spadix produces more female flowers. In addition the plant is not self-pollinating since the male flowers on a specific plant have already matured and died before the female flowers of that same plant are mature. So the female flowers need to be pollinated by the male flowers of a different plant. This inhibits inbreeding and contributes to the health of the species.” It makes sense.

Elaine, Unless Walter Reeves deletes everything after SEX EDUCATION you are going to learn more than you wanted…….But, Elaine, your picture shows two plants and they both have fruit on them…..so they had to have flowered…. here in Ohio they bloom around April so in MN it would have bloomed around May (probably while you were still over-wintering in Texas or Florida) Now one little tidbit of trivia (or SEX EDUCATION) ….I have heard that the Jack-in-the-Pulpit is BI-SEXUAL. When the plant is young it is male. As it grows or matures it becomes female. (Yours are definitely female.) ….. A fly pollinates the flowers. First the fly must visit the male plant to pick up pollen. The fly gets trapped by the “pulpit” or “spathe” but in the male plant the spathe is slightly open at the bottom allowing the fly to escape to visit another plant. (Whew!) When the fly visits a female plant it again gets trapped in the spathe … but in the female plant the spathe is tightly wrapped at the bottom trapping the poor fellow. In the fly’s struggle to escape out the top of the spathe the female hopes to pick up some pollen and bear fruit. [The spathe, known in this plant as “the pulpit” wraps around and covers over and contain a spadix (“the Jack”)] Keep doing what you are doing, Elaine, because they like it!

Thank you. The plant has been there for four years or so and has yet to develop the hooded flower. I just measured one of the largest individual leaves at 7″ x 11″.

That is one giant of a ‘Jack-in-the-Pulpit” http://en.wikipedia.org/wiki/Arisaema_triphyllum