Contains 9 accepted taxa overall.
Characteristics
Classification
Citation
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Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Cirsium altissimum | tall thistle | Native SX (State Rank) G5 (Global Rank) | |
| Cirsium arvense | creeping thistle, Canada thistle | Not Native Naturalized FACU-, FAC (NWPL) FACU (NWPL EMP) FACU (NWPL NCNE) SNA (State Rank) GNR (Global Rank) | |
| Cirsium discolor | field thistle | Native UPL (NWPL EMP) UPL (NWPL NCNE) S5 (State Rank) | |
| Cirsium flodmanii | Flodman’s thistle | Not Native FAC (NWPL EMP) FACU (NWPL NCNE) SNA (State Rank) G5 (Global Rank) | |
| Cirsium horridulum var. horridulum | yellow thistle, giant thistle | Native FACU (NWPL EMP) FACU (NWPL NCNE) S3 (State Rank) | |
| Cirsium muticum | swamp thistle | Native FACW+, OBL (NWPL) OBL (NWPL EMP) OBL (NWPL NCNE) S5 (State Rank) G5 (Global Rank) | |
| Cirsium palustre | marsh thistle | Not Native Naturalized FACW (NWPL NCNE) SNA (State Rank) GNR (Global Rank) | |
| Cirsium pumilum ssp. pumilum | pasture thistle | Native S5 (State Rank) G4G5 (Global Rank) | |
| Cirsium vulgare | bull thistle | Not Native Naturalized UPL, FAC (NWPL) FACU (NWPL EMP) FACU (NWPL NCNE) SNA (State Rank) GNR (Global Rank) |