Jack-in-the-pulpit (Arisaema triphyllum) is a native wildflower seen at Glenstone in April and May. Hailing from the botanical family known as the arum family (Araceae), its inflorescence has the typical spathe-and-spadix structure of this family. The "spathe" is a structure that wraps the “spadix,” which is the structure holding all the plants' flowers. A flowering structure containing many small flowers is called an “inflorescence.” In this case, the plant's common name alludes to this structure—Jack is the plant's spadix, while his pulpit is the spathe! Skunk cabbage is another common native example of this, though house plants like the peace lily or anthuriums also display this floral form. As the species' name might suggest, the glossy leaves of this plant are divided into three distinct leaflets. In the late summer and fall, clusters of bright red berries can be seen on pollinated plants. At Glenstone, Jack-in-the-pulpit can be seen growing along the Woodland Trail, sharing habitat with earlier spring blooms like bloodroot.

–Kevin McDonald