The binomial, for reasons of completeness and accuracy, is followed by the name(s) of the person or persons who first published that name for the plant. For example, in the scientific name Moringa oleifera Lam., the "Lam." stands for Lamarck.
We find the name Lam for many other plants. Example Eriosem psoraloides (Lam), Strychnos spinosa Lam, Ziziphus lotus (L.) Lam. It most probably means Herman Johannes Lam (1892-1977) a Dutch botanist who gave detailed description of these plants.