Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Centaurea nigrescens
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Tyrol Knapweed at Vascular Plants of North Carolina.
INCLUDING
PLANTS NATIONAL DATABASE:
Centaurea nigrescens
FAMILY
Asteraceae
SYNONYMOUS WITH Flora of North America
Centaurea nigrescens
INCLUDING PLANTS National Database
Centaurea transalpina
COMMON NAME:
Tyrol Knapweed, Short-fringed Knapweed
To see larger pictures, click or hover over the thumbnails.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_cevo2_001_lvd
)
JK Marlow jkm121006_361
October Washington County VA
Virginia Creeper Trail
)
JK Marlow jkm121006_361b
October Washington County VA
Virginia Creeper Trail
Outer flowers of the heads larger than others, per Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006).
)
JK Marlow jkm121006_362
October Washington County VA
Virginia Creeper Trail
Involucral bracts with a triangular blackish tip, with a fringe, per Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006).
)
JK Marlow jkm121006_363
October Washington County VA
Virginia Creeper Trail
Heads relatively narrow, the involucres black and green, per Weakley's Flora.
COMPARE
involucral bracts of Centaurea
)
JK Marlow jkm121006_366
October Washington County VA
Virginia Creeper Trail
)
JK Marlow jkm121006_368
October Washington County VA
Virginia Creeper Trail
Peripheral florets sterile, expanded & exceeding corollas of fertile florets, per Flora of North America.
)
JK Marlow jkm121006_371
October Washington County VA
Virginia Creeper Trail
Stem leaves unlobed, less than or equal to 6" long, per Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006).
)
JK Marlow jkm121006_375
October Washington County VA
Virginia Creeper Trail
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Centaurea nigrescens
FAMILY
Asteraceae
INCLUDING
PLANTS NATIONAL DATABASE:
Centaurea nigrescens
FAMILY
Asteraceae
SYNONYMOUS WITH
Flora of North America
Centaurea nigrescens
INCLUDING
PLANTS National Database
Centaurea transalpina
3526
Forb
Perennial
Habitat: Roadsides, disturbed areas, per Weakley's Flora
Non-native: Europe
Rare in NC (increasing rapidly in VA)
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
LEAVES:
Simple
Basal & alternate
FLOWER:
Summer/Fall
Disc: Pinkish-purple
Rays: Pinkish-purple
Bisexual, all fertile or peripheral florets sterile
Inferior ovary
FRUIT:
Summer/Fall
Achene
TO LEARN MORE about this plant, look it up in a good book!
- Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007) p290
- Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006) p024