About Dendrobium monophyllum F.Muell.
Dendrobium monophyllum F.Muell., commonly called lily-of-the-valley orchid, is an epiphytic or lithophytic herb that typically forms clumps. Its pseudobulbs are pale green to yellowish, furrowed, 60–120 mm (2–5 in) long and 20–30 mm (0.8–1 in) in diameter. One or two thin, bright green leaves grow at the end of each pseudobulb, each leaf 80–120 mm (3.1–4.7 in) long and 25–30 mm (0.98–1.2 in) wide. Between five and twenty resupinate, bell-shaped yellow flowers, each 6–8 mm (0.24–0.31 in) wide, are borne on a 100–200 mm (4–8 in) long flowering stem. The dorsal sepal is egg-shaped, 6–7 mm (0.24–0.28 in) long and about 3 mm (0.1 in) wide. The lateral sepals are triangular, 4–5 mm (0.16–0.20 in) long and about 4 mm (0.2 in) wide. The petals are 6–7 mm (0.24–0.28 in) long and about 2 mm (0.08 in) wide. The labellum is about 7 mm (0.3 in) long and 5 mm (0.2 in) wide, with a blunt tip and two ridges along its midline. Flowering occurs from August to December. This species grows on trees, rocks, cliffs, and the well-lit upper branches of rainforest trees, distributed in the area between the Atherton Tableland in Queensland and Grafton in New South Wales.
