Fig. 3 clonal phenology curves for coreopsis lanceolata .
图3剑叶金鸡菊的克隆生长物候曲线.
A north american annual plant ( coreopsis tinctoria ) widely cultivated for its showy flower heads with yellow rays and purple-red to brownish centers .
金鸡菊一种北美一年生植物（两色金鸡菊金鸡菊属），因其带有黄色伞形花序和紫红。
Any of various plants of the genus coreopsis in the composite family , especially the north american species , having showy radiate flower heads with yellow or , rarely , purplish flowers .
