Spiranthes diluvialis
 Spiranthes diluvialis is a rare species of orchid known by several common names including Ute lady's tresses (also Ute ladies'-tresses). The species name diluvialis means of the flood. It is native to the western United States where there are scattered mostly small occurrences in the states of Colorado Idaho Montana Nebraska Nevada Utah Washington and Wyoming. An occurrence was recently discovered in southern British Columbia. The plant faces a number of threats to its existence.