Microtis gracilenta R.J.Bates

Leaf 300–500 × 4–7 mm. Inflorescence 400–700 mm tall (rarely to 1 m tall), 20–30-flowered. Flowers moderately crowded, 3–3.5 × 2.5 mm, porrect, yellowish green. Dorsal sepal obliquely erect, 1–1.2 × 1 mm, concave, apex shortly triangular. Lateral sepals oblong, c. 0.9 × 0.5 mm, inrolled beside labellum. Petals linear, c. 0.8 × 0.5 mm, held partially within dorsal sepal. Labellum oblong, c. 1.2–1.5 × 0.5 mm, porrect at first then recurved, margins paler, thickened, wavy, with papillate cell clusters; apex more or less square. Basal callus single, crescent-shaped, dark green, shiny; apical callus absent.

Localised; growing among sedges in peaty soil in a few swamps associated with small creeks flowing from the hills.