Easily-confused!
If your specimen is/has a:with stems/​leaves ar­ranged:and the leaves:then you have:
woody stem, tree ╫ opposite taper at both ends, and
pass the dogwood leaf test
lookalike flowering dogwood  Cornus florida.
are ♤ heart-shaped with a ∪ rounded-base lookalike northern or hardy catalpa  Catalpa speciosa.
╟ alternate this plant, please continue below …
🌾︎ herbaceous,
 vertical stem interior=​hollow, cham­bered with periodic diaphragms like bamboo
are ♤ heart-shaped except for a __ flat-base lookalike Japanese knotweed  Fallopia japonica.

Verify with 🔍︎ images.

Learn more about eastern redbud Cercis canadensis

🔍︎ 🔍︎ images Discover Life Encyclopedia of Life Michigan Flora (Minnesota) Wild Flower Garden Missouri Botanical Garden Missouri Plants Native Plant Trust NRCS PLANTS db Silvics USFS Wikipedia