Mitridate-Mustard, or BASTARD-CREss, Thlaspi, L. a genius of plants comprising fourteen species, six of which are na-tives of Britain : the principal of these is the arvense, Smooth Mi-thridate -Mustard, Treacle-Must-ard, or penny-cress. It grows in corn-fields, especially in muddy soils, and flowers in the months of June and July.

The whole plant has the flavour of garlic; and its seeds possess the acrimony of mustard. It is, nevertheless, eaten by goats, hogs, and cows, to the milk of which it imparts an unpleasant taste : but is refused by horses and sheep.