Paphiopedilum sukhakulii

ORCHIDACEAE: THE LADY SLIPPER ORCHIDS - Paphiopedilum sukhakulli f. aureum from WOC, Singapore: Paphiopedilum sukhakulii f. aureum Van Delden ex O.Gruss, Orchidee
(Hamburg), Suppl. 6: 16 (1999).

Many believe this to be same as P. sukhakulii and it is supposed to be endemic to Thailand.
Pic taken at WOC, Singapore.