Arisaema dracontium (Linnaeus) Schott. Section: Flagellarisaema. Phen: May-Jun; Jul-Aug. Hab: Bottomlands and floodplains, rarely in uplands over mafic or calcareous rocks or substrates. Dist: S. QC, MI, and WI, south to n. peninsular FL and e. TX.
Origin/Endemic status: Native
Taxonomy Comments: Ward (2012b) recognized two varieties: var. dracontium with the "spathe tightly inrolled around the spadix, to 1.5 cm broad when unrolled" and var. macrospathum (Bentham) D.G. Huttleston ex D.B. Ward, with the "spathe flared distally, forming a blade, to 2.5 cm broad". The "macrospathium" name is based on a type in Mexico and is misapplied to our taxon; this entity is here treated as Arisaema species 1.
Synonymy: = Ar, C, ETx1, F, FNA22, G, GrPl, GW1, Il, K1, K4, Mi, Mo1, NcTx, NE, NY, Ok, Pa, RAB, Tn, Tx, Va, W, WH3, Gusman & Gusman (2002), Spaulding et al (2019); = Muricauda dracontium (L.) Small – S; > Arisaema dracontium (L.) Schott var. dracontium – K3, Ward (2012b); > Arisaema dracontium (L.) Schott var. macrospathum (Benth.) Huttl. ex D.B.Ward – K3, Ward (2012b)