Thelasis capitata Blume

Plants forming small clumps. Pseudobulbs 10–15 × 10–15 mm, laterally flattened. Leaf single, strap-shaped, 50–150 × 10–18 mm, dark green, thick, fleshy, unequally notched. Racemes 70–180 mm long, from base of pseudobulb, stiff, slender, multiflowered. Flowers 3–4 × 2.5–3 mm, yellowish green, base tubular. Dorsal sepal c. 3 × 1.5 mm. Lateral sepals c. 4 × 2 mm. Petals c. 2.5 × 1 mm. Labellum decurved, 4–4.5 × 2.5 mm, entire.

Locally common; found growing on tall trees in moist to wet rainforest.

Thelasis capitata features on a Christmas Island 45c postage stamp as part of a series of five stamps on indigenous orchids, issued 16 August 1994.