medicago echinus(n = noun.plant) calvary clover, medicago intertexta - an annual of the Mediterranean area having spiny seed pods and leaves with dark spots;
is a kind of medic, medick, trefoil

echinus, echinus esculentus, genus medicago, medicago, medicago arborea, medicago falcata, medicago intertexta, medicago lupulina, medicago sativa