Resources

Weed Field Guide - USDA Forest Service

Representative Images

12 Images Send these Selected Images to Your Light Box

1624009 squarrose knapweed Centaurea virgata Plant(s) Steve Dewey	0024099 squarrose knapweed Centaurea virgata Flower(s) Steve Dewey	1350051 squarrose knapweed Centaurea virgata Flower(s) Cindy Roche	1459278 squarrose knapweed Centaurea virgata Flower(s) Steve Dewey
0024100 squarrose knapweed Centaurea virgata Plant(s) Steve Dewey	0022001 squarrose knapweed Centaurea virgata Infestation Sara Rosenthal	0024097 squarrose knapweed Centaurea virgata Plant(s) USDA Agricultural Research Service Archive	0024098 squarrose knapweed Centaurea virgata Plant(s) USDA Agricultural Research Service Archive
1459277 squarrose knapweed Centaurea virgata Infestation Steve Dewey	1459279 squarrose knapweed Centaurea virgata Infestation Steve Dewey	1459282 squarrose knapweed Centaurea virgata Plant(s) Steve Dewey	5374341 squarrose knapweed Centaurea virgata Flower(s) Joseph M. DiTomaso

Maps

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

Alternative content

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

Alternative content

Invasive Listing Sources

Taxonomic Rank

Kingdom: Plantae

Phylum: Magnoliophyta

Class: Magnoliopsida

Subclass: Asteridae

Order: Asterales

Family: Asteraceae

Genus: Centaurea

References

Common Name Reference:	USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.
Scientific Name Reference:	USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.