matricaria: chiefly Old World strong-smelling weedy herbs; comprises plants sometimes included in other genera: e.g. Tanacetum; Tripleurospermum
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination
palatine: either of two irregularly shaped bones that form the back of the hard palate and helps to form the nasal cavity and the floor of the orbits