Philodendron fibrosum aff is an eunidentified Philodendron, similar to Philodendron fibrosum Sodiro ex Croat. It is epiphytic often appressed-climbing, sometimes terrestrial aroid.  Leaf blades are very broadly ovate to almost rounded, acuminate at apex, cordate at base, subcoriaceous to thinly coriaceous; upper surface is very deep dark green, and  matte-subvelvety to velvety above; lower surface moderately to much paler and semiglossy. Petiole densely to sparsely setose-scaly at leaf base.
 
From the Modern Latin genus name Philodendron (Schott, 1830), from Greek philodendron, neuter of philodendros "loving trees," from philo- "loving" (see philo-) + dendron "tree" (from PIE *der-drew-, from root *deru- "to be firm, solid, steadfast," also forming words for "wood, tree"). The plant so called because it clings to trees.