That's not the pure, native Maypop (Passiflora incarnata). That is a non-native hybrid, probably Passiflora 'Incense' or 'Inspiration'. The true Maypop only has 3-lobed leaves, its flowers are much paler, its petiole glands will generally be right up against the bases of the leaves, and it will bear yellowish/light-green, egg-shaped fruit. Your hybrid will probably never bear fruit, or only very rarely...

Suzanne, milkweeds have opposite foliage. Leaf arrangement is a helpful aid for any identification. It eliminates many possibilities with similar foliage. Not sure about E/C canadensis. The flower clusters look looser and the buds much fatter than the ones I see here.

Maybe Argemone sanguinea? Not a plant I’ve ever seen myself.

AWRITE!! Thanks so much, palmate is just what I was looking for. Castor bean and Ninebark and Rose of sharon, yes! "PALMATUM," of course! "cutleaf" and acerifolium are also words I can search now, thanks. I thought of the Monstera and Xanadu type Philodendron, too. Now I have a list of plants to investigate for attractive leaf shapes! Thank you so much, and don't hesitate to add another reply if this list gets you thinking of another HAND-leaved plant. Fiveleaf aralia Eleutherococcus sieboldianus Thimbleberry Rubus parviflorus Mapleleaf Viburnum Viburnum acerifolium Cranberry Viburnums (Like a trilobum / opulus var americanum, right?) Cutleaf Hazels Corylus avellana 'Heterophylla' Fragrant Sumac Rhus aromatica Cutleaf Lilac Syringa x laciniata Ninebark Physocarpus opulifolius Rose of Sharon Sweetgum Liquidambar styraciflua 'Gumball' Bottlebrush buckeye Aesculus parviflora Castor bean Ricinus communis karolyn Edited to add: Figs! Okra!