This garden and ornamental plant, which is from

China and Japan (Grubber 1991, 39*), has

occasionally been described as a euphoriant,

although its use is "strongly unadvised" (Schuldes

1995, 41*). When smoked, the dried leaves and

flowers are said to have effects similar to those of

marijuana (see Cannabis indica). The leaves

contain the isocoumarin hydragenol, which has

been linked to contact allergies (Roth et al. 1994,

411 *). Other constituents include a substance

known as hydrangin, saponins, and hydrocyanic

acid compounds (Gottlieb 1973,20*).

Takeda, Kosaku, Tomoko Yamashita, Akihisa

Takahashi, and Colin F. Timberlake. 1990. Stable

blue complexes of anthocyanin-aluminium-3-pcoumaroyl-

or 3-caffeoyl-quinic acid involved in

the blueing of Hydrangea flower. Phytochemistry

29 (4): 1089-91.

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