Cirsium

Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Contains 9 accepted taxa overall.

Family:	Asteraceae
Common Name:

Classification

Division	Magnoliophyta - Flowering Plants
Class	Magnoliopsida
Sub Class	Asteridae
Order	Asterales
Family	Asteraceae
Genus	*Cirsium*

Citation

Citation	**
Basionym:	**
Type:	**

** Not applicable or data not available.

Species

Scientific Name	Common Name	Status
Cirsium altissimum	tall thistle	Native, Not Persisting, SX (State Rank), G5 (Global Rank), CoC: 10
Cirsium arvense	creeping thistle, Canada thistle	Not Native, Persisting, SNA (State Rank), GNR (Global Rank)
Cirsium discolor	field thistle	Native, Persisting, S5 (State Rank), CoC: 1
Cirsium flodmanii	Flodman’s thistle	Not Native, Not Persisting, SNA (State Rank), G5 (Global Rank)
Cirsium horridulum var. horridulum	yellow thistle, giant thistle	Native, Persisting, S3 (State Rank), CoC: 5
Cirsium muticum	swamp thistle	Native, Persisting, S5 (State Rank), G5 (Global Rank), CoC: 9
Cirsium palustre	marsh thistle	Not Native, Persisting, SNA (State Rank), GNR (Global Rank)
Cirsium pumilum ssp. pumilum	pasture thistle	Native, Persisting, S5 (State Rank), G4G5 (Global Rank), CoC: 1
Cirsium vulgare	bull thistle	Not Native, Persisting, SNA (State Rank), GNR (Global Rank)

For more information, contact: David Werier or Kyle Webster

Web Development: USF Water Institute

A member of the University of South Florida family of PlantAtlas.org sites

Citation Information:

Werier, David, Kyle Webster, Troy Weldy, Andrew Nelson, Richard Mitchell†, and Robert Ingalls†. 2025 New York Flora Atlas. [S. M. Landry and K. N. Campbell (original application development), USF Water Institute. University of South Florida]. New York Flora Association, Albany, New York.

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Definition: Vouchered Specimen

A voucher specimen is a pressed and thoroughly dried plant sample deposited in a herbarium, and is intended to be a permanent record supporting research purposes. A voucher may be a record of a plant's occurrence in a particular area, or a specific example of a plant used in a scientific investigation.

Proper vouchers display all the necessary attributes for complete identification of the plant, and are to be accompanied by accurate locality, habitat, collection time, and collector data.

Only plant populations vouchered by specimens deposited in Index Herbariorum (http://sweetgum.nybg.org/science/ih/) recognized herbaria are represented on this map.