BCP/Ambrosia trifida


Ambrosia trifida

Botanical drawing

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Profile for Ambrosia trifida (Giant Ragweed)
Identifying Characteristics
Flowers:Minute heads on dense spikes. Yellow, but appear green from a distance.
Life Cycle: Perennial
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Global data:

Regional data:
Southeastern Pennsylvania: (native) August, September

Additional images:

Please contribute!
Please contribute!
This page is a profile for the plant species Ambrosia trifida, used to collect records of where and when this plant was observed blooming, and for providing identification information for use in dichotomous keys. If you would like to help collect data for this or other plants, see Bloom clock project/How to Contribute for orientation.