Paphiopedilum delenatii and Paphiopedilum callosum are endemic and endangered rare slipper orchids of Vietnam and other Indochinese countries ( Averyanov et al., 2003). Though Paphiopedilum is a favorite potted flower in several countries due to their attractive colors and distinctive shapes, they have been protected by the Convention on International Trade of Endangered Species (CITES) of Wild Flora and Fauna.