Paphiopedilum wardii album is the green form of the species. It lacks anthocyanin so there is no red pigment in the flowers. The foliage also lacks pigment so the leaves are bright green, rather than darker green with red spotting at the base.
This form of the Paph wardii tends to grow into smaller plants than the type and has flowers that are a bit smaller too. The plants do grow well and don’t seem to be weaker than pigmented ones, which can be a problem with some species. They are easy to grow when treated like any other mottled leaf Paph. You can find detailed growing tips here.