Ser. Rubiginosae Hand. -Mazz. (Primulaceae)
系8. 聚花系——Ser. Rubiginosae Hand. -Mazz. in Not. Roy. Bot. Gard. Edinb. 16: 101. 1928; ——Lysimachia sect. Nummularta ser. Debiles Hand. -Mazz. l. c. 92. 1928. p. p. spp. cit. incl. tantum: L. congestiflora Hemsl. (L. hui Hand. -Mazz., L. gymnocephala Hand. -Mazz.); Chen et C. M. Hu in Act. Phytotax. Sin. 17: 37. 1979.
形态特征：花集生茎端或枝端，呈头状花序状；花丝下部合生成筒。茎匍匐或上升。叶对生。植物体具有色腺点或腺条。
产地分布：本系有下列4种。