I visited the habitat of C. nurii in West Pahang again recently. This is the variety of C. nurii with miniature spathe as can be seen later. Below is a video clip of the habitat (a small river with fast flower water) for your reference.
Both emersed and submersed specimens could be found at this location.
Some collector probably named the specimens found here as C. nurii 'Central Pahang'. My explorer friend named the C. nurii found here as "luminous green" due to the luminous green marking which could be seen on the upper side of the leaves. Some of the leaves veins were rather pronounced too but not enough to be termed as "rosanervig". The edge of the leaves was wavy too (common for C. nurii) and the under side could be reddish in colour.
The below photograph will clearly show why I said that they had miniature spathe. The tube of the spathe was extremely short for this variety of C. nurii.