The specimen of Cowan & Wurdack 31108 from Serrania Paru has pentamerous corollas 4 mm long with a tube 3 mm long, whereas two flowering specimens examined from Chimanta Massif and Uei tepui (Steyermark & Wurdack 502 and Steyermark & Nilsson 320) have 6-merous, slightly larger corollas 5.5-6 mm long with the tube 4 mm long. Since flowering material is not available for other material from the other tepuis, and since fruiting material does not offer distinguishing characters, it seems best to regard this taxon as comprising one widely ranging species with corollas varying from pentamerous to 6-merous and from 4-6 mm long.
The flowering head consists of 5-8 unequal bracts and three flowers. The 3-5 larger, obovate bracts are obtuse to subobtuse, whereas the 2-4 smaller ones are oblanceolate and abruptly acute to acuminate. Each of the flowers is subtended by one bract. The fruit, which is minutely puberulent, is nearly smooth dorsally or with only lightly costulate rounded surface, and consist of pyrenes concave ventrally, without any groove dorsally, without any prominent ribs or nearly smooth, in this respect similar to the group to which P. bahiensis belongs.