During spring, they bloom two-lipped, purple flowers that fade to release seeds ... Canada thistles usually appear as thick strands, topping out at 4 feet. They're mostly concentrated on moist ...

Pink evening primrose: four-petaled flowers with dark pink to white ombre petals. Horsemint: purple, tuft-like flower heads with white spikes. Drummond phlox: cluster of pink, white or red flowers ...