[USDA zone 4a - 9a]
 
Plants are seed grown, 3-4 years old, flowering size ¾” – 1” tubers, in 2" - 3" rose pots ready for planting. Hardy in USDA zones 4 - 9 at least. Plants are now confirmed as A. triphyllum subspecies pusillum which is sometimes called Arisaema pusillum.  I am uncertain if it is a valid species, subspecies. or variety. I just realize they are distinct.
 
A member of section Arisaema. This species is native to Southern Quebec, southern Ontario, the entire east coast of the US south to northern Florida, west to Minnesota, Iowa, eastern Nebraska, eastern Kansas, eastern Oklahoma, and eastern Texas. This species as with most Arisaema species are seasonally dormant. Plants sprout from a subterranean corm or tuber in the same fashion as the spring Crocus.  Plants of this species grow 6” – 35”. Mature plants often reach 18” tall. Each tuber produces a single stem that terminates with one or two “leaves”. Each “leaf” consists of 3 large rounded to teardrop shaped leaflets.  The plant alone is very ornamental. The inflorescence is produced from 1” – 10” up the stem (if one leaf) or between the leaves (if two leaves). The inflorescence is single flowered and the flower opens as the leaves begin to unfurl giving a good view of the flower. The “flower” is actually a modified inflorescence that consists of the spathe (outer ornamental part) and the spadix (internal sexual bits). The spathe is 1½” – 7” tall. The spadix is contained within the cup of the spathe or with the tip visible. These are seed raised from seeds collected in my garden in western Pennsyltucky.  Photographs are from this seedling batch. Spathes vary from solid green, green with few purple markings on the underside of the hood, and green with a solid dark purple underside of the hood.