This widespread eastern taxon of mesic to subxeric woods is largely tetraploid (2n = 56), in contrast to the other segregates of triphyllum (2n = 28). Forms with purple (typical), striped (forma zebrina) and green (forma viride) flowers are all scattered widely through Ky. Colls. need to be studied more closely to distinguish pusillum; see also stewardsonii and quinatum. A. triphyllum, like other Araceae, is highly unpalatable due to oxalate crystals, and deer generally avoid it (Frankland & Nelson 2003).