About Dendrobium gracilicaule F.Muell.
Dendrobium gracilicaule F.Muell. is an epiphytic or lithophytic herb. It produces cylindrical yellowish green pseudobulbs that are 40–100 cm (20–40 in) long and 4–13 mm (0.2–0.5 in) wide, with each pseudobulb growing between three and seven leaves at its top. The leaves are thin and dark green, measuring 70–130 mm (3–5 in) long and 20–40 mm (0.8–2 in) wide. The flowering stem is 50–150 mm (2–6 in) long, and holds between five and thirty often drooping flowers. The flowers range in color from cream-colored to yellow or greenish, and measure 10–16 mm (0.39–0.63 in) in both length and width. One variety of this species has large reddish blotches on the back of its flowers. The sepals are 7–10 mm (0.3–0.4 in) long and 3–4 mm (0.12–0.16 in) wide, and they are relatively thick and fleshy. The petals are 7–10 mm (0.3–0.4 in) long and 3–4 mm (0.1–0.2 in) wide. The labellum is 7–10 mm (0.3–0.4 in) long and 5–6 mm (0.20–0.24 in) wide, and it has three lobes. The side lobes curve upwards, the middle lobe is kidney-shaped, and the middle lobe bears three wavy ridges. Flowering of Dendrobium gracilicaule occurs between July and September.
