Philodendron x joepii Croat nothosp. nov. ined. is said to be almost extinct in the wild. It was found by Joep Moonen  during a ecological tour of the Mararoni River in eastern French Guiana. Intrigued by the strangely shaped leaves, he at first thought they had been chewed by insects. After an exhaustive search, he only found one additional plant. It is thought that fewer than 3-4 plants remain in the wild.  
 
This Philodendron is a nothospecies (indicated by the 'x' in the name) which means it is a hybrid which is formed by direct hybridization of two species, not other hybrids. Joep has come to the conclusion it may be a hybrid, saying it may be "a natural hybrid between Philodendron bipennifolium and Philodendron pedatum. The 'ears' and inflorescences of 'joepii' look like (those) in pedatum." Commenting that both of these species grew near the natural locations of P. 'joepii' he went on to explain, "I found only 2 plants in the wild (on the) Mataroni River in eastern French Guiana, many Amazonian species there".
 
Leaf blades show a wide lower lobe tapering upwards into a slender narrow upper body and then topped by a pair of upwardly and outwardly pointing lobes. Philodendron x joepii is a scandent herb and will climb given suitable support. It is a very easy and prolific grower.
 
form the Modern Latin genus name Philodendron (Schott, 1830), form Greek philodendron, neuter of philodendrons "loving trees," form philo- "loving" (see philo-) + dendron "tree" (form PIE *der-drew-, form root *deru- "to be firm, solid, steadfast," also forming words for "wood, tree"). The plant so called because it clings to trees.