absus,-a,-um from L. absus, different, distant, distinct: Cassia absus. The name would refer to a small river in Palestine where to plant would have occured frequently or found for the first time (Backerhowever couldn’t foundthis river on any map) nagaan
 
1900765 229473 Chamaecrista absus (L.) H.S.Irwin & Barneby [116 208458 Cassia absus L.] J.F. von Jacquin, Ecl. Pl. Rar., vol. 1 : p. 78, t. 53 (1811-1813) [J.F. Jacquin]
 
3214815 229473 Chamaecrista absus (L.) H.S.Irwin & Barneby [116 208458 Cassia absus L.] T.F.L. Nees von Esenbeck, M.F. Wijhe (Weyhe), Pl. Medicin., vol. 1 : (1828) [A. Henry]
 
2948265 229473 Chamaecrista absus (L.) H.S.Irwin & Barneby [116 208458 Cassia absus L.] P. Alpino, J. Vesling, De plantis Aegypti liber, editio altera emendatior: p. 97 (1640)