The vertical form of the liatris is a welcome compliment to many of the daisy-like flowers that are in bloom this time of year. I often see them alongside echinacea (coneflower) or rudbeckia (black-eyed Susan). In the photo above, I love the mixture of purples and whites but also the contrast of liatris's strong vertical form against the wispy nature of the Russian Sage in the background and the big foliage of the montauk daisy.
To me, the flower spikes of liatris remind me of fireworks just before they explode in the sky. Each spike blooms tiny flowers from the top-down (most other spikes bloom bottom-up). They come in purple, white and various shade of pink. It's lovely fragrance attracts both butterflies and hummingbirds.
Even when not in flower, it's grassy-like foliage looks handsome nestled among the neighboring perennials. Give it lots of sunshine and It's easy to grow and care for. What's not to love?