Philodendron callosum is a species of flowering plant in the family Araceae. An epiphyte, it is native to wet forests of northern South America. Its floral scents dihydro-β-ionone and 2-hydroxy-5-methyl-3-hexanone serve to attract its pollinators, scarab beetles of the genus Cyclocephala. With its leathery, glossy leaves it has found use as a houseplant.
Subtaxa The following subspecies are accepted: Philodendron callosum subsp. callosum – Venezuela, Guyana, French Guiana, northern Brazil Philodendron callosum subsp. ptarianum – Venezuela, Guyana, northern Brazil
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