Obviously there are variations.
A new variety of Paph canhii has been described in the latest issue of 'Die Orchidee' [64(4), 2013] Paphiopedilum canhii var. funingense Z.J.Liu et L.J.Chen.
The new variety differs from the typical Paph canhii by its much shorter flower stem -it's only 2 cm long-, the green striped dorsal and a synsepal which is nearly as wide as the dorsal.
There are also photos and paintings but it's complicated to publish them in this forum with regard to the copyright (a link doesn't exist).
@ Mr. Canh
Thank you for your photos and information. Both I enjoy very much !