This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Sambuci Flores - Elder Flowers. - The fresh flowers of Sambucus nigra. From indigenous plants.
Characters. - Flowers small, white, fragrant, in cymes. Composition. - Elder flowers contain a trace of volatile oil, a resin, and baldrianic (valerianic) acid, C6Hl0O2.
Elder flowers are chiefly used for flavouring purposes, but probably possess mild diaphoretic and diuretic properties.