Cornus sanguinea 'Compressa'
One of the most distinctly "What is that plant?" deciduous shrubs around is this tough little mutant redstem dogwood. Intensely columnar and slow with curled leaves held close to the vertical stems. These turn a most satisfying purple in the fall. As far as flowers go, forget about it. Slow growing, our 6 footer in the garden is pushing 40 years of age.