Leaf 100–300 × 5–7 mm, often lax, thick, fleshy. Flower stem 400–700 × 2–5 mm, wiry, 1–8-flowered. Sterile bracts 1 or 2. Flowers 35–50 mm across, bright blue with darker blue veins, rarely white or pink. Sepals and petals 16–25 × 8–14 mm, sepals longer than petals. Labellum obovate, larger and more differentiated than in most other sun orchids, margins often crinkled. Column 3–5 × 2.5–3.5 mm, broadly winged, white or mauve; post-anther lobe short, not hooding anther, with bead-like papillae; column arms more or less erect and parallel, 2–3 mm long, yellow, flat, spirally twisted, without apical lobe or tooth. Anther near column apex, with a long, prominent point.