This is a widespread northern and western species that is unknown as a wild plant in Ky. but reported from close to the border in Ill., Ind. and Ohio (K). It is widely cultivated, and further investigation of potential escapes is needed. Colls. from KENT and WEBS (KNK) have been referred to inserta (or the potential synonym P. vitacea (Knerr) A.S. Hitchc.), but these colls. are not clearly distinct. V. Voelker (NP; inaturalist.org/observations/222357475) has recently discovered a potentially escaped patch in FAYE. Following the detailed key of W, inserta can be distinguished as follows: inflorescence without a well-developed central axis, the dichotomous branches relatively equal (versus with a well-developed zigzag central axis, the dichotomous branches very unequal), corymbiform (versus panuciliform), as wide or wider than long, with 2-3 main branches, with a total of 10-60 flowers (versus 25-200+); tendrils with mostly 3-5 branches, usually none terminating in adhesive disks though sometimes swollen at the tip (versus with mostly 3-8 branches, most or all branches terminating with adhesive disks (though young shoots may not have the disks yet formed); leaves usually glossy above (versus dull), often dark green (versus medium green); leaflets borne on long petiolules, often > 10 mm long (versus sessile, subsessile, or short-petiolulate, usually < 5 mm long); leaflet margins coarsely and jaggedly toothed, the teeth usually prominent in the lower half of each leaflet as well as the upper half; berries 6-12 mm in diameter (versus toothed primarily past the widest point, with few and obscure teeth below).