Unless you’re taking a herbarium specimen or moving stuff in the garden, we often don’t see how deep some native plant roots are. Today I helped two friends rescue plants from a remnant prairie that is about to be dozed and built on. (We dug with permission.)
Spiderworts, native perennial dayflower, an all yellow Gaillardia, fleabane, western horse nettle, and Heterotheca (I think?) all came up easily with a sharpshooter shovel. Little bluestem has very deep roots but I think they are supposed to be okay to divide. Fern acacia (I think??) had a longer root (over a foot for a 6” tall plant) that may have broken.