Note this part "As most recently defined (Decker-Walters, et al., 1993), free-living gourds that occur in Texas are classified as C. pepo ssp. ovifera var. texana. Similar, free-living plants that occur in the U.S. beyond Texas (Illinois, Missouri, Arkansas, Oklahoma, and Louisiana) are placed in C. pepo ssp. ovifera var. ozarkana." There still seems to be disagreement on what to call and the relations between pepo, texana, and fraterna. That 1993 ref is 20 years. I'm looking for newer stuff.