Large knob blue orchid (Figure)
Oncidium ampliatum, commonly known as the Dancing Orchid or Dainippon Orchid, is a striking member of the Orchidaceae family. This perennial herb features large, densely clustered pseudobulbs that are flat-ovate to oblate in shape, typically reaching up to 12.5 cm in length, often marked with red or brown spots. The plant usually has one to three elliptic-lanceolate leaves, which can grow up to 37 cm long and 12.5 cm wide. Its stems are upright or slightly curved, sometimes branching, and bear numerous flowers. Each bloom measures about 2.5 cm in diameter, displaying bright yellow petals with contrasting white, brown, or red markings. Today, blue orchids available in cultivation are all hybrid varieties, but Oncidium ampliatum remains one of the most popular cut flower species worldwide. It is widely used in floral arrangements due to its long blooming period, vibrant colors, and unique, exotic appearance. Native to tropical regions of America, this orchid thrives in warm, humid climates with plenty of sunlight. It is commonly grown in pots or planted beds using substrates such as fern roots, moss, volcanic ash, and bark. Propagation is typically done through ramets or tissue culture methods. During spring, summer, and autumn, regular fertilization and proper irrigation are essential for healthy growth. In winter, it requires temperatures above 15°C to prevent damage. With its beauty and adaptability, Oncidium ampliatum continues to be a favorite among orchid enthusiasts and florists alike.
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