Abstract
Gibberellins A1, $\text{A}_{19}$, $\text{A}_{20}$, and $\text{A}_{29}$ have been identified by sequential high-performance liquid chromatography retention time (Rt) and combined gas chromatography-mass spectrometry (Rt and characteristic mass spectra) from elongating shoots of Salix pentandra L. Gibberellins A1 and $\text{A}_{19}$ were also detected in purified extracts from male and female flowers (catkins) of S. pentandra.