Alyssum serpyllifolium, the thyme-leaved alison, is a species of flowering plant in the family Brassicaceae, native to the western Mediterranean region.

[5] If soil is contaminated with high concentrations of metals this is likely because of mineral rock weathering or as a result of industrialization.

Alyssum serpyllifolium is mainly found in the Iberian Peninsula, Northeastern Portugal, and in Spain.

[6] One of the features that this plant developed was used to help it adapt to its soil which contains a high concentration of metals.

[7] This plant was used in a phytoremediation experiment to absorb the metal contaminated soil.