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Gymnostoma sumatranum

In Singapore: Sumatran Ru (Grown in Singapore)

Gymnostoma sumatranum
Photo: KATHERINE WAGNER-REISS, CC BY-SA 4.0

Gymnostoma sumatranum is a tropical tree in the she-oak family (Casuarinaceae) with drooping, jointed, equisetum-like twigs and rounded umbrella-shaped crowns. It grows in wet tropical lowland to montane forest and is rarely grown as an ornamental, so care notes are general guidance for a moist tropical tree.

Family
Casuarinaceae (Casuarin family)
Grows as
Tree
Light
Part shade, Bright indirect
Water
Keep the soil evenly moist and never let it dry out completely; it likes moisture.
Soil
Well-drained, slightly acidic, sandy or loamy mix; tolerates poor soils.
Temperature
20–32 °C; protect below 10 °C
How easy
Moderate
Native range
Sumatera
Climate
wet tropical

About

Gymnostoma sumatranum is a tree in the she-oak family, Casuarinaceae, native to Southeast Asia and the Malesia region.

Where it grows

According to Plants of the World Online, Gymnostoma sumatranum is endemic to the island of Sumatra in Indonesia. The IUCN Red List indicates a wider range for the species, including Sumatra, Java, Peninsular Malaysia, Borneo, the Philippines, Sulawesi, Maluku, New Guinea, the Bismark Archipelago, and the Solomon Islands.

Other Gymnostoma plants

Gymnostoma nobile

[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]

Text excerpted from the Wikipedia article Gymnostoma sumatranum 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.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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