组2．通泉草组——Sect. Mazus——Sect. Annuae Bonati, Bull. Herb. Boiss . 2(8): 527. 1908. p. p.——Sect. Stoloniferae Bonati, 1. c. 528. p. p. ——Sect. Caespitosae Bonati, 1. c. 528. p. p.