Ipomoea muelleri BENTH, a plant which is distributed throughout the tropical region of Australia has been listed as a suspected toxic plant in Western Australia by GARDNER and BENNES [1]. In 1965, intoxication of sheep in Western Australia by I. muelleri was described clinically and pathologically by GARDINER, etal. [2]. He stated that the cause of sheep losses might be due to the combined action of nutritional stress and plant alkaloids (including lysergic acid amide and isolysergic acid amide) which might be contained in this plant as previously described in related species [3]. In recent investigations in our laboratory, it has been possible to separate ergoline-type alkaloids from morning glories by means of column chromatography combined with two dimensional thin layer chromatography on silica-gel impregnated plates [4]. A total of 39 ergoline alkaloids have been separated from the seeds of I. muelleri, of which, 20 compounds have been identified. At least 19 unknown compounds were noted as minor constituents. Of those isolated, three major compounds viz. ergine, isoergine and chanoclavine (I) were obtained in crystalline form and were characterized by infrared spectral data. One of the purposes of this study has been to demonstrate the value, rapidity and simplicity of combined column and two dimensional thin layer chromatographic methodology and its ready application to the separation and identification of ergoline alkaloids in convolvulaceous seed materials.