A variable species, both in height and leaves. This is, perhaps, the commonest of the orchids. The different species of ladies' tresses are much alike, all being known by the twisting of the spike of flowers. In this species the flowers are in rows of threes, quite close together, slightly fragrant, white, on a straight, tall stem. The sepals and petals are stiff and waxy. The lip is folded or wavy, oblong, turned down. There are long root-leaves, which at time of flowering have, generally, disappeared. Leafy bracts, beginning below the spike, follow around with the flowers. September and October.