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Philodendron adamantinum

Thaumatophyllum adamantinum

Philodendron adamantinum
Photo: Agente Itallo, CC BY 4.0

Philodendron adamantinum (also called Thaumatophyllum adamantinum) is an aroid from southeast Brazil, grown as a houseplant in cooler climates. It is a slow-growing, low-light tolerant plant that does best with bright indirect light and careful, moderate watering.

Family
Araceae (Arum family)
Light
Bright indirect
Water
Water when the top few centimetres of soil feel dry; avoid soggy soil.
Soil
Well-draining, peat-based aroid mix with perlite or bark.
Temperature
18–27 °C; protect below 10 °C
How easy
Easy
Safety
Toxic: All parts contain calcium oxalate crystals in raphide bundles, which cause burning, swelling and irritation of the mouth and throat if chewed, and skin irritation from the sap.

About

Philodendron adamantinum, synonym Thaumatophyllum adamantinum, is a plant in the genus Philodendron, in the family Araceae. It is native to South America, namely to Southeast Brazil, but is also cultivated as a houseplant in cooler climates.

On the basis of DNA sequencing, Philodendron adamantinum was transferred to Thaumatophyllum adamantinum. However, the genus Thaumatophyllum was not accepted by Plants of the World Online and other taxonomic databases as of October 2025.

Safety

Philodendron species are poisonous to vertebrates, but vary in their toxicity levels. They contain calcium oxalate crystals in raphide bundles, which are poisonous and irritating. The sap may cause skin irritation.

Other Thaumatophyllum plants

Philodendron bipinnatifidum · Philodendron goeldii · Philodendron xanadu

Text excerpted from the Wikipedia article Philodendron adamantinum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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