diffuse knapweed
Centaurea diffusa Lam.
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| Taxonomic Rank: Magnoliopsida > Asterales > Asteraceae > Centaurea |
| Common Name Synonym(s): white knapweed |
| Taxonomic Synonym(s): Acosta diffusa Lam. |
| Category: Plants: Forbs/Herbs |
58 Records | View Images as Host | View Descriptions |
 0021031 Flower(s) Norman E. Rees |
 0021032 Flower(s) USDA ARS Archive |
 0021033 Flower(s) Norman E. Rees |
 0024090 Plant(s) Sara Rosenthal |
 0024091 Infestation Eric Coombs |
 1148105 Flower(s) USDA APHIS PPQ Archive |
 1211085 Flower(s) close-up of two flowers Dave Powell |
 1299133 Control burning; south of Shoshone, Idaho Steve Dewey |
 1350049 Plant(s) Cindy Roche |
 1350078 Flower(s) Cindy Roche |
 1459254 Flower(s) Steve Dewey |
 1459255 Plant(s) Steve Dewey |
 1459256 Management Prescribed burn Steve Dewey |
 1459257 Flower(s) Steve Dewey |
 5229071 Plant(s) Richard Old |
 5229072 Seedling(s) Richard Old |
 5229073 Flower(s) Richard Old |
 5229074 Foliage rosette Richard Old |
 5358642 Plant(s) Diffuse knapweed plant (Centaurea diffusa) in bloom, against a fence. L.L. Berry |
 5358643 Flower(s) Close-up view of a flower head and flower bud of diffuse knapweed (Centaurea diffusa), showing the spiny bracts. L.L. Berry |
 5358644 Flower(s) Close-up view of flowers and buds of diffuse knapweed (Centaurea diffusa). L.L. Berry |
 5360195 Research Potted greenhouse plant K. George Beck |
 5360196 Plant(s) Diffuse Knapweed flowering K. George Beck |
 5366154 Plant(s) bolting growth stage K. George Beck & James Sebastian |
 5366155 Plant(s) bolting growth stage K. George Beck & James Sebastian |
 5366158 Infestation Tumbling diffuse knapweed trapped in pasture fence K. George Beck & James Sebastian |
 5366159 Plant(s) Tumbling diffuse knapweed trapped in pasture fence K. George Beck & James Sebastian |
 5366160 Plant(s) Tumbling diffuse knapweed trapped in pasture fence K. George Beck & James Sebastian |
 5366161 Flower(s) Variation in flower color. K. George Beck & James Sebastian |
 5366163 Foliage basal leaves K. George Beck & James Sebastian |
 5366164 Foliage Closeup of diffuse knapweed cauline leaves K. George Beck & James Sebastian |
 5366166 Foliage Diffuse knapweed stem and cauline leaves K. George Beck & James Sebastian |
 5366167 Plant(s) Grazed diffuse knapweed produced two flowering shoots instead of a single shoot. Diffuse knapweed usually only produces one flowering shoot but if grazed or damaged, it produces two or more shoots. K. George Beck & James Sebastian |
 5366168 Plant(s) rosettes and bolting plants K. George Beck & James Sebastian |
 5366170 Foliage rosettes K. George Beck & James Sebastian |
 5366171 Foliage rosettes K. George Beck & James Sebastian |
 5366172 Seed(s) K. George Beck & James Sebastian |
 5366173 Seedling(s) fall germinated seedlings K. George Beck & James Sebastian |
 5366174 Seedling(s) fall germinated seedlings K. George Beck & James Sebastian |
 5366175 Plant(s) Plant caught on undercarriage of a truck. Potential dispersal mechanism. K. George Beck & James Sebastian |
 5374329 Plant(s) Two color forms (white and purple) Joseph M. DiTomaso |
 5374330 Flower(s) white and purple form Joseph M. DiTomaso |
 5374331 Foliage stem leaves Joseph M. DiTomaso |
 5374332 Feature(s) buds on rootstalk Joseph M. DiTomaso |
 5374333 Seedling(s) Joseph M. DiTomaso |
 5383073 Infestation infestation along roadside Carey Minteer |
 5383076 Feature(s) typical bleaching of inflorescence after the emergence of Larinus minutus. Carey Minteer |
 5383080 Flower(s) typical bleaching of seed head after the emergence of Larinus minutus. Carey Minteer |
 5383081 Flower(s) after the emergence of Larinus minutus. Carey Minteer |
 5383082 Flower(s) typical bleaching of inflorescence after the emergence of Larinus minutus. Carey Minteer |
 5383083 Feature(s) typical bleaching of inflorescence after the emergence of Larinus minutus. Carey Minteer |
 5383084 Feature(s) typical bleaching of inflorescence after the emergence of Larinus minutus. Carey Minteer |
 5383086 Root(s) roots being attacked by Cyphocleonus achates. Carey Minteer |
 5383087 Root(s) roots being attacked by Cyphocleonus achates. Carey Minteer |
 5383088 Flower(s) plant infested with Cyphocleonus achates larvae. Carey Minteer |
 5383099 Flower(s) Carey Minteer |
 5383100 Feature(s) typical features of a plant dying from attack by biocontrol agents. Carey Minteer |
 5383102 Feature(s) inflorescence stressed by biocontrol agents Carey Minteer |
