Technical Abstract: Agronomic traits among 66 siratro (Macroptilium atropurpureum) accessions were characterized for variability and regeneration in Byron and Griffin, GA, U.S.A. At 50% maturity, siratro accessions were evaluated for branching, foliage, height, width, days to maturity (DTM), and seed numbers between May through June 2000, 2005, and 2007 - 2008. Most of the accessions produced many branches and foliage. The best accessions for early maturity (96 DTM) and seed production (averaging 2,429 seeds per accession) included PI 451726, PI 543331, and PI 543380. The Australian accession, PI 543332 produced slightly smaller plants maturing later (121 DTM) and the highest number of seeds (4,480). The coefficient of variation was 109% for DTM and 169% for seed number indicating high variability for these traits. Potential exists to develop cultivars with improved early maturity and high seed yield. Analysis indicated that accessions clustered in group 1 revealed closer genetic relationships than those in groups 2 and 3. These accessions require further field evaluations in the southeastern U.S.A. for pasture value under grazing conditions.