Studies on ivy leaf speedwell in this paper show that its chromosome number varies from 18, 36, 54, 32 to 22, accounting for 23.91%, 1.09%, 2.17%, 69.57%and 3.26%of the total respectively.

• 对该种的染色体计数表明，我国境内的这一新外来杂草染色体数目从18、36、54、32和22均有；分别占总计数的23.；91%25、1