The exudates from seven Acacia species, not hitherto studied chemically, have been examined. As a result, variation in the characteristic features of the Acacia group of plant gums can now be discussed from a more representative viewpoint. Species considered previously to have atypical features (e.g., positive optical rotation or low rhamnose content) are now seen to occur almost as frequently as those with negative rotations and unit correspondence between the rhamnose and uronic acid content.