Sambucus is the dried flowers of Sambucus nigra.
Commercial samples are European, collected during early summer.
Sambucus contains a trace of semi-solid yellow volatile oil , rutin, tannic acid and muclilage. Merck Index, p. 918. Green leaf fragments about 2 by 4 mm are rare. Oil drops are present in the parenchyma tous cells of the corolla. The calyx bears infrequent broad conical hairs.