Liatris is a genus of North American perennial plants with tuberous-stocks, commonly known as snakeroot. The erect-growing flower- are clothed with smallish , many being excellent for . Liatris will grow in any good garden soil, but seem to object to being planted deeply. The appear during August and September, the spikes opening from the top downwards instead of the usual, opposite way.
Propagation is by careful division of the tuberousin spring and autumn or, in most cases, by sown in the usual way with .
Species: L. callilepis produces 3-ft spikes of purple-magenta, often as early as July, its showiness making it attractive as a cut flower, L. elegans, 3 ft, sometimes more, has purple. L. punctata, 2-3 ft, violet-purple flowers, is notable for its brown-spotted -stems. L. pycnostachya, in spite of its name, is popular with florists, often growing 4 ft with attractive spikes of pale purple. Other species include L. scariosa, 3-ft, large purple flowers; L. spicata, 2-3 ft, lovely mauve, and L. squarrosa, 2-3 ft, bright purple.