This study was conducted to investigate the variation in seed traits and nutrient contents among 26 provenances of Chukrasia tabularis from 8 countries in Asia and Australia. There were highly significant differences among provenances in seed length (range 5.77~8.82 mm), seed width (3.82~5.52 mm), seed thickness (0.59~0.82 mm), seed length-width ratio (1.41~1.77), 100-seed weight (0.81~1.52 g), and contents of soluble protein (14.12~51.65 mg?g-1), soluble sugar (10.36%~16.63%) and starch (18.83%~70.74%) in seed. Although provenances showed mixed performances across the seed parameters measured, seeds from Australia and Malaysia were generally larger and heavier, and had higher protein, sugar and starch contents than those from other countries. Significant correlations between seed traits and environmental attributes were observed. Nutrient contents were correlated negatively with altitude, suggesting that provenances from lower altitude had higher nutrient contents, and vice versa. Principal component analysis revealed that seed length, width and weight, and soluble protein, soluble sugar and starch contents were useful characteristics in explaining the variation pattern among provenances. This study indicates marked variation in seed size parameters and nutrient content among C. tabularis provenances and the influence of geographic location and climate on the variation.