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Ambrosia artemisiifolia (Common Ragweed), bark, stemAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), flower, fullAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), habit, fallOctober 4 2008
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), habit, fallOctober 16 2012
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), habit, springMay 2015
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), habit, spring, habit, youngJune 16 2008
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), habit, spring, seedlingJune 16 2008
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), habit, summerSeptember 15 2007
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), habit, summerJuly 28 2008
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), habit, summerAugust 9 2017
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), habitat, habit, summerAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), inflorescenceSeptember 15 2007
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), inflorescenceAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), inflorescenceAugust 9 2017
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), inflorescenceAugust 9 2017
Brown, Deborah J. G.
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Ambrosia artemisiifolia (Common Ragweed), infructescenceOctober 6 2012
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), leaf, lower surfaceAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), leaf, summerJuly 28 2008
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), leaf, upper surfaceAugust 16 2014
Hedborn Jr., Edward A.
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Ambrosia artemisiifolia (Common Ragweed), leaf, upper surfaceJuly 28 2008
Hedborn Jr., Edward A.