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.

千里光属植和蒲公英属植表面的纵棱为突起，可能有吸附小颗粒和控制表面温度，蒲公英属植表面的微刺可能有2次传播。