Bulbophyllum grandimesense B.Gray & D.L.Jones

Clumps semi-erect to pendulous, sparsely branched. Stems 20–80 mm long, with brown bracts, roots arising mainly from basal nodes. Pseudobulbs 4–6 × 1.5–2.5 mm, naked. Leaves on stalks 4–5 mm long, 15–50 × 3–5 mm, dark green, fleshy, narrowly and shallowly grooved. Flowers usually single; stems 1.5 mm long; flowers 6–8 × 5–7 mm, white. Sepals and petals fleshy, sepals with thread-like tips. Dorsal sepal 8–9 × 2–2.5 mm. Lateral sepals 8–9 × 2–2.5 mm. Petals c. 2.5 × 1.5 mm. Labellum fleshy, c. 2.3 × 1.3 mm, base erect then curved in semi-circle, blunt.

Highly localised; growing on the small, upper branches of rainforest trees.