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.

千里光属植公英属植瘦果表面的纵棱为突起，可能有利于吸附小颗制表面温度，公英属植瘦果表面的微刺可能有利于2次传播。