Terrestrial herb, slender, geophyte, 0.1-0.6 m high; root tubers present. Leaves radical, narrowly lanceolate, grading into cauline leaves. Inflorescence a lax spike. Flowers many, resupinate, white to rose-pink or yellow. Sepals: median sepal galeate; lateral sepals 7-16 mm long; spur conical, laterally flattened. Petals strap-shaped, reflexed parallel to anther, obliquely narrowly oblong, apex acute curved over anther. Lip patent, apex curved upwards, linear, 3-4 mm long. Flowering time June-Sept.
Slender, tuberous geophyte to 60 cm, stoloniferous. Leaves basal, narrowly oblanceolate. Flowers few in a lax raceme, white to pink, spur conical to cylindrical, 2-3 mm long, lateral sepals obovate, elliptic or oblong, 8-15 mm long.