Characteristics
Dicots
Centaurea diffusa Lam.
Tumble Knapweed; Tumble Knap Weed; Diffuse Knap Weed; Diffuse Knapweed; White Flowered Knap Weed; White Flower Knap Weed; Whiteflowered Knap Weed; Whiteflower Knap Weed; White Flowered Knapweed; White Flower Knapweed; Whiteflowered Knapweed; Whiteflower Knapweed
forb
1
**
Not Native
KY[SNA] (State Rank)
GNR (Global Rank)
Anther Type
Basifixed
Armaments
Yes
Base Flower Color
Pink; Purple; White
Carpel Number/Pistil
1; 2
Duration
Annual; Perennial
Fruit Complexity
Simple
Fruit Dehiscence
No
Fruit Type
Cypsela
Fruit Wet/Dry
Dry
General Ecology
Terrestrial
Growth Habit
forb
Inflorescence Position
terminal
Inflorescence Types
head; corymbiform
Leaf Arrangement
basal; alternate
Leaf Complexity
simple
Leaf Dissection
1; 0, .5
Leaf Duration
deciduous
Leaf Fragrance
No
Leaf Petiole Type
petiolate; sessile
Leaf Type
broadleaf; thistle-like
Leaf Venation
pinnate
Leaflet Margins
lobed
Leaflet Number
0
Moisture Requirements
Xeric; Mesic
Ovary Position
Inferior
Overall Flower Symmetry
Actinomorphic
Ovules per Carpel
1
Parent Rock
Calcareous; Limestone
Perianth Present
Yes
Petal Fusion
Yes
Petal Number
5
Pistil Complexity
Simple
Pistil Number
1
Placentation Type
Basal
Soil Composition
Mineral
Soil pH
Alkaline
Stamen Number
5
Unconsolidated Rock
Yes
Woody Herbaceous
Herbaceous
Classification
Asterales
Centaurea diffusa Lam. - Tumble Knapweed; Tumble Knap Weed; Diffuse Knap Weed; Diffuse Knapweed; White Flowered Knap Weed; White Flower Knap Weed; Whiteflowered Knap Weed; Whiteflower Knap Weed; White Flowered Knapweed; White Flower Knapweed; Whiteflowered Knapweed; Whiteflower Knapweed
Species Distribution Map
This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display its name.
Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.
Ecoregions
Southeastern Plains
-
Blackland Prarie
Blue Ridge Mountains
Ridge and Valley
Cumberland Plateau
Cumberland Mountains
Allegheny Plateau
Interior Plateau
-
Bluegrass Region
Nashville Basin
Pennyroyal Karst Plain
Western Highland Rim
Eastern Highland Rim
Interior River Valleys and Hills
-
Shawnee / Caseyville Hills
Mississippi Alluvial Plain
Mississippi Valley Loess Plains
Synonyms
Specimens and Distribution
Click on an Accession Number to view additional details about the specimen.
Range of years during which specimens were collected: