Ambrosia trifida (giant ragweed) stigma with pollen (SEM). Curtis and Lersten 1995. Int. J. Plant Sci. 156: 35.
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| Curtis, Lersten, and Nowak 2002 rev. 2015 | |||||
Ambrosia trifida (giant ragweed) stigma with pollen (SEM). Curtis and Lersten 1995. Int. J. Plant Sci. 156: 35. |
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