Hydrangea thurnbergii.

Botanical name: 

Hydrangea thurnbergii Siebold. Saxifrageae (Hydrangaceae). Tea-Of-Heaven.

Japan. The natives use the dried leaves as a substitute for tea. This tea is called ama-tsja, tea-of-heaven.


Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.