Flowers tiny, on a vertical clublike structure called a spadix. This floral structure is sheltered by a canopylike spathe, a modified leaf that is green with white and brown lengthwise markings. The base of the spathe forms a cylinder around the spadix and is thus the “pulpit.” The tip of the spathe is rather blunt. Blooms April–June. Leaves dull green, on long stems, compound with 3 leaflets, with the side leaflets asymetrical. Fruits clustered berries that turn from shiny green to brilliant scarlet. Rootstock a starchy corm.
Similar species: Green dragon (A. dracontium) has leaves with 5–15 leaflets, and its spathes are green, wrap tightly around the spadix, and are long-tapering to a pointed tip. The fruits of the two species are identical.