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The Cowslip or Butter Orchid is a western australian wildflower. The species Caladenia flava is a perennial herb, which grows from underground stems. The leaf and flowerstalk appear from these to present several yellow flowers during July – December. The leaf is long for the species size, becoming narrower beyond the middle. Flowers are on a long stalk and are between two and five, usually yellow, occasionally pinkish or white, and speckled with magenta. Sepals and petals are broad though long, tapering to a point, and contracted at the base. Lateral sepals may be over 2–3 mm long, the upper sepal is smaller, with a reddish line of splotches along the centre. The flower has a lip over 5 mm with a small claw-shaped structure, three lobes are nearly separate, lateral lobes are ovate, the middle lobe longer and slightly broad, bordered on each side by several long structures (calli). These calli are in two rows, almost a semicircle. A column structure is present, and is winged from the base.