Scandent herb. Stem internodes elongate (18 cm ), , cataphyll remains persisting thinly fibrous. Cataphyll 14.5 cm. LEAVES: Petiole almost terete, ca. 16 cm long. Leaf blade more or less papery when dry, outline more or less triangular, 29 cm long, 19.2 cm wide (very wide between the apices of the posterior lobes); margins of the anterior lobe slightly convex, but at somewhat contracted 2.5 cm above base midrib and 14 cm wide, the apex slightly acuminate (ca. 2.5 cm); posterior lobes sub-oblong, 5.7 cm wide, apex rounded, somewhat extrorse, separated by a broadly parabolic 6.5 cm deep sinus. Primary lateral veins slender, 4-5 in the anterior lobe, the lower most pair of lateral veins departing at an angle up to ca. 90º, the second pair departing at ca. 75º, andd the tertiary pair departing at 65º; Each posterior lobe has 3 robust lateral veins joined together towards the base, and naked for 1.5-2 cm in the sinus. INFLORESCENCE unknown.
This species is totally distinct from P. auyantepuiense Bunt., differing by the proportionally broader leaf blade of thinner consistency with a few, more or less prominent, primary lateral veins. The latter species, known only from Auyantepui in the state of Bolivar, has a coriaceous (in vivo possibly somewhat fleshy) leaf blade with numerous, subequal lateral veins all manifest and a few primary lateral veins weakly discernible abaxially. This differs from P. yutajense by the extrorse posterior lobes of the leaf blade and the nearly terete petiole. Moreover, it is an epiphyte, while the latter is terrestrial or grows on boulders.