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[Studies on the pollen morphology of ten species of Achillea]
1School of Pharmaceutical Sciences, Peking University, Beijing 100083, China.
Objective:
To study the pollen morphology of ten species of Achillea.
Method:
The pollen morphology of ten species of Achillea was examined with LM and SEM.
Result:
The pollen grains were usually 3-colporate, subspheroidal. The exine ornamentation consisted of verrucate, spinulate and foveolate. But some differences in size, colpae and exine ornamentation were found.
Conclusion:
The slight differences of the pollen morphology are useful to some extent for the classification of the ten species of Achillea.
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