A water soluble galactomannan having D-Mannose [4-part] and D-Galactose [2-parts] was isolated from Cassia fistula. In cassia fistula Hydrolysis of methylated seed gum furnished three methylated sugars, 2, 3-di-O-methyl-D-mannose, 2, 3,6-triO methyl -D-mannose and 2, 3,4,6-tetra-O-methy-D-galactose was present in molar ratio 3:2:1. Partial acid catalysed hydrolysis of the seed gum gave five oligosaccharides epimelibiose, mannobiose, galactosyl mannobiose, mannotriose and Mannotetraose along

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... the component sugars. Periodate oxidation an d methylation studies in cassia fistula showed 33.6% of end groups from the recent studies it is the concluded that galactose unit in galactomannan only terminal positions.