]> [H. J. Esser] [author note: A, BKF, HBG, L, TCD, U; Euphorbiaceae] [collector note: A, AAU, BKF, CMU, E, F, HBG, K, L, P, TCD, WU; Thailand, etc. (coll. 2000s): M (large set); Cameroon: YA] Botany Esser, Hans-Joachim Esser, Hans-Joachim H. J. Esser Esser Esser, Hajo Hans-Joachim Esser 1960