Ridges on achene surface in Senecio and Taraxacum are useful for absorbing small particles or control-ling surface temperature.Spinule on achene of Taraxacum may be fit for epizoochore.

千里光和蒲公英瘦果面的纵棱为突起，可能有利于吸附小颗粒和面温度，蒲公英瘦果面的微刺可能有利于2次传播。