The Tibetan Lady's Slipper Orchid (Cypripedium tibeticum is a terrestrial orchid which grows to around 20-30cm tall. This orchid is native to the high meadows and forest margins of Bhutan, Sikkim and China. The highly corrugated pouch of the flower of this orchid is an attractive feature. The plants grow in clumps and flowers from May to July. 

Pollination is usually done by Bumble bees. The Tibetan Lady's Slipper orchid have large lip with dark dorsal opening which often touches or stays close to the ground. Mated queen bumblebees emerge out of winter hibernation and search for nesting sites, which are mostly mouse holes. The dark dorsal opening of the lip of the orchid is mistaken by the queen bumblebees for a mouse hole and becomes entrapped inside the flower. While the bee struggles to escape, the flower gets pollinated (Pemberton, R. W. , 2013).

References

 Pemberton, R. W. (2013). Pollination of slipper orchids (Cypripedioideae): A Review. Lankesteriana. https://doi.org/10.15517/lank.v0i0.11539