Japanese angelica tree

For this tree, also called Aralia elata, Dryad’s FLAMITS database reports a temperature at flaming of 267°C for live leaves. The measurement comes from a 2008 study by Shan and colleagues using an ignition temperature tester. It describes the leaves under those test conditions.

Temperature at flaming measures the temperature at which flaming begins during the test. It does not, by itself, tell a gardener whether the whole tree should be considered fire resistant. The distinction matters because a numerical result can look like a rating even when no rating threshold has been applied. FLAMITS preserves the experimental context and the original measured variable; it does not impose a single fire-resistance threshold across different measurements, devices and plant parts.

For a homeowner choosing Japanese angelica tree, the useful conclusion is therefore limited but clear: its leaves have been tested for ignition, without that measurement establishing a resistant or flammable classification. A laboratory observation is useful information about a plant’s response to heat. Turning it into a planting recommendation requires more than treating the reported temperature as a pass or fail.