Species within a genus
bis, bi-, = twice, twofold, having two-;
annus, = that lasts a year or continues through a year, of a year’s duration.
biennis, = of twoyears, lasting two years.
(of two years; a plant which springs from seed and vegetates one year (or growing season) and flowers, fructifies and perishes the next)
(ld, Ox)
(ld, Ox)