Before the publication of Paphiopedilum wenshanense in 2000, this species was considered to be a naturally occurring hybrid. The putative parents were suggested as being Paph. concolor and Paph. bellatulum.
Having seen a small population of plants in situ when they were in bloom in May 2016, I've concluded that Paph. wenshanense is a highly variable species in both flower form and colour pattern. There was no evidence of Paph. concolor nor Paph. bellatulum in this area.
The plants were growing on a limestone mountain at around 1,500 m in Yunnan. This was the dry season and the nearby moss on the limestone was dry.
Colour varied from white to pale yellow or dark yellow with mostly bold spots. Of the couple of dozen plants that we saw there was only one twin-flowered inflorescence. All the others were single-flowered.
This one has a good rounded form, a deep yellow flower with bold markings on the dorsal and petals.
''Paphiopedilum wenshanense'', commonly known as the egg-in-a-nest orchid, is a species of orchid found from southeastern Yunnan, Guizhou and southern Guangxi of China to Indochina. It is also found in Myanmar and Thailand at an altitude of 1,000 to 1,800 meters. The leaves are a dark green with white spots on top, but the underside is purple. The flower is round, about 6–8 cm in diameter.