Abstract
Lysergic acid and clavine alkaloids in the extracts of 68 kinds of Convolvulaceae seeds were investigated by fluorophotometry, thin-layer chromatography, column chromatography and infrared spectrophotometry. Lysergic acid amide, isolysergic acid amide, lysergol and elymoclavine were identified as the alkaloidal components in nine morning glory seeds of horticultural varieties which were commercially available. The total alkaloid contents in these seeds determined by the colorimetric method with Van Urk reagent were 0.0003 to 0.0206% as lysergic acid amide.
