Cymbidium madidum Lindl.

Pseudobulbs 120–250 × 40–60 mm, turgid, green, crowded. Leaves erect to arching, 4–8 per pseudobulb, strap-shaped, flat, 300–900 × 30–40 mm, thin-textured, pliable, dark green. Racemes arching to pendulous, 200–600 mm long, 10–70-flowered. Flowers 22–35 × 20–30 mm, pale green to dark green or brownish green. Sepals and petals projected forwards rather than widely spreading, thick-textured. Dorsal sepal 12–15 × 5–6 mm. Lateral sepals 12–15 × 5–6 mm. Petals 10–13 × 4–5 mm. Labellum 12–15 × 5–6 mm, 3-lobed; lateral lobes erect, crescent-shaped; midlobe porrect, usually yellow, upper margins often upcurved, with single broad, shiny ridge.

Widespread and common in moist to wet, humid habitats, including rainforest (especially littoral rainforest), swamp forest, on fan palms in swamps, sheoak groves, and sheltered areas of open forest in high rainfall areas. It frequently grows on trees with thick, papery or fibrous bark, particularly paperbarked species of Melaleuca, swamp mahogany and sheoaks (Casuarina and Allocasuarina species), but also often in large, old eucalypts and clumps of elkhorn fern (Platycerium bifurcatum) and other large epiphytes; also on rocks, boulders and cliff faces, sometimes even growing as a terrestrial in sandy soil of littoral rainforest. It also colonises trees in streets and parks in coastal towns in the tropics.

Cultivated ornamental.

Plants can be grown by division.