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| male heads--the genus Iva is closely related to Ambrosia (the ragweeds). Both are wind-pollinated, unlike most members of the sunflower family. One major difference between the two genera, however, is that in Iva the bracts subtending each male head are large and conspicuous. | leaves--what is the leaf arrangement? |
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| leaf--what types of leaf margin and leaf venation are present? | |
