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|Profile for Cirsium vulgare (Bull Thistle) |
Southeastern Pennsylvania: (invasive or naturalized) August, September
New Hampshire: August, October
Southwest Oregon: August
Central Pennsylvania: August
This page is a profile for the plant species Cirsium vulgare, 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.