Botanical name: Ceratostylis siamensis Family: Orchidaceae (Orchid family)
Synonyms: Ceratostylis pygmaea, Eria banaensis
Thai Horn-Lip Orchid is a small sized, tree-dwelling orchid with stubby rhizomes giving rise to stems carrying a single, apical, linear leaf. The plant blooms in the fall with a short single flowered inflorescence. Flowers are small, 5 mm across, white with purplish red spots, lip whitish yellow. Flower-stalk and ovary 2-3 mm long, velvet-hairy. Dorsal sepal oblong-lanceshaped, below velvet-hairy, hairless above, pointed, 3 x 2 mm; lateral sepals broadly ovate, pointed, 2-3 mm, below velvet-hairy, hairless above. Petals narrowly oblong, hairless, 2-3 x 1 mm. Lip is oblong, boat-shaped, 2-3 mm, thickened, base deeply saccate, margin entire, tip with a cushion like callus. Column very short, column foot short and warty. Thai Horn-Lip Orchid is found in Arunachal Pradesh to China (S. Yunnan) and Indo-China. Flowering: March-June.
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The flower labeled Thai Horn-Lip Orchid is ...