Philodendron atabapoense

Lowland origins in northern South America

George Bunting described Philodendron atabapoense in 1975 from material collected near Yavita in Venezuelan Amazonas at 125–140 m. It is native to Venezuelan Amazonas. The species has also been recorded in Colombia’s Guainía, while a 2026 study examined plants identified as this species in Amapá State Forest in northern Brazil.

These localities suggest a low-elevation, humid-forest distribution across parts of the Guiana Shield and adjoining Amazonian region.

Care for supported climbing aroids

• Long leaves and stability: Provide a tall, very stable climbing surface and secure both it and the pot. Its long leaf stalks and leaves can make the plant top-heavy, so use a stable base.
• Light along the blades: Strong diffused exposure suits active growth. Acclimatise the long leaves carefully before increasing direct sun.
• Watering: Once the mix surface starts drying, wet the root zone throughout and allow complete drainage.
• Climate, feeding and pot size: Warmth, moderate humidity and gentle air movement suit this species. Feed modestly while leaves and roots are growing, and choose a larger stable container when the roots become crowded.
• Cuttings and seedlings: Root a stem tip or node to reproduce the existing plant. Seedlings can vary naturally.

Philodendron atabapoense long-leaf and climbing problems

• Burgundy undersides and petiole spots: Wine-coloured young veins, lower leaf surfaces and petiole spotting are normal pigment. Attached scale lifts as separate bodies, while rot produces soft tissue that continues to spread.
• Expanding wet spots: Keep this climber separate when a lesion grows or enters the petiole or stem. Dry the long blades and prevent water from splashing between plants.
• Wilting: Check if the deep pot contains dry and saturated zones, then compare firm roots with soft ones. Trim away fully dead roots and renew compacted potting mix.
• Pests along the climbing axis: After identifying the pest, apply a suitable treatment to the full lower leaf surface, rolled growth and support-facing nodes, then keep checking new leaves.
• Damage on long blades: Narrow leaves can crease, rub or tear against a wall or support. A dry stable scar with a matching contact point is physical. Silver trails, black specks, stippling or webbing call for inspection beneath the blade.
• Smaller leaves or long gaps: Weak light and poor aerial-root contact can reduce climbing development. Secure the long stem to a firm surface and increase light gradually.

Philodendron atabapoense is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• Its leaves and stems contain insoluble calcium oxalate crystals, which can irritate the mouth, throat, skin and eyes.
• Chewing may cause burning pain, drooling, swelling, vomiting or difficulty swallowing. Contact a veterinarian or medical professional after exposure, especially if swelling or breathing problems occur.

Philodendron atabapoense: where the name comes from

Philodendron combines Greek philein, meaning “to love,” with dendron, meaning “tree.” The epithet atabapoense refers to the Atabapo region and river in the upper Orinoco basin.

Heinrich Wilhelm Schott established the genus Philodendron in 1829 in Wiener Zeitschrift für Kunst, Literatur, Theater und Mode, volume 3, page 780.

George Sydney Bunting first described Philodendron atabapoense in 1975 in Acta Botanica Venezuelica, volume 10, page 291.