yellow lady's slipper orchid

The bright yellow, cup-shaped lip of the yellow lady's slipper orchid attracts insects that cannot find a grip on the smooth walls and slip into a trap. The only way to freedom is through a narrow tube, past the stamens and stigma, pollinating the flower. The yellow lady's slipper grows in sparse deciduous and mixed coniferous forests on nutrient-poor limestone soils. In Luxembourg, it grew in forests around Grevenmacher, but has not been observed since 1957.