Herniaria lusitanica is a species of flowering plant in the family Caryophyllales.

It is endemic to the Iberian Peninsula and the Berlengas archipelago.

It has very ramified stems, 9–3 mm (0.35–0.12 in) leaves and densely packed glomeruli with 4-15 flowers.

[1] Herniaria lusitanica is native to the Iberian Peninsula and the Berlengas archipelago of Portugal.

It grows in agricultural fields, pathways and altered land in dry places.