Nodding Lady’s Tresses (spiranthes cernua) is a perennial forb or herb. It is a monocot native to the United States and has its most active growth period in the spring and summer. It has green foliage (which is not retained year to year) and conspicuous purple flowers. Seed production starts in the spring and lasts until fall. Compared to most other plants, Nodding Lady’s Tresses has a short life span and a moderate growth rate. Once mature, the plant can reach a height of 1.5 feet.