Russian knapweed
Acroptilon repens (L.) DC.
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| Taxonomic Rank: Magnoliopsida > Asterales > Asteraceae > Acroptilon |
| Common Name Synonym(s): hardheads |
| Taxonomic Synonym(s): Centaurea picris (L.) DC. Centaurea repens (L.) DC. |
| Category: Plants: Forbs/Herbs |
44 Records | View Images as Host | View Descriptions |
 0022036 Flower(s) Eric Coombs |
 0022037 Plant(s) Norman E. Rees |
 0022038 Plant(s) Norman E. Rees |
 0022039 Infestation Norman E. Rees |
 0022041 Infestation Norman E. Rees |
 1459258 Plant(s) Steve Dewey |
 1459259 Seedling(s) Steve Dewey |
 1459260 Infestation Steve Dewey |
 1459261 Flower(s) Steve Dewey |
 1459262 Plant(s) Steve Dewey |
 1459263 Plant(s) Steve Dewey |
 1459264 Feature(s) Bud stage with detached bracts Steve Dewey |
 1459265 Flower(s) Steve Dewey |
 5224099 Flower(s) Richard Old |
 5224100 Flower(s) Richard Old |
 5225001 Foliage Richard Old |
 5225002 Stem(s) Richard Old |
 5306049 Fruit(s) Steve Hurst |
 5358634 Research Dr. George Beck, Colorado State University, measuring the root penetration of a Russian knapweed plant (Acroptilon repens). L.L. Berry |
 5358635 Seedling(s) Seedling Russian knapweed plant (Acroptilon repens). L.L. Berry |
 5358636 Feature(s) Close-up view of the stem and leaves of Russian knapweed (Acroptilon repens), showing characteristic fuzz (hairs, "knap"). L.L. Berry |
 5360181 Root(s) Crown root section of Russian knapweed K. George Beck |
 5360182 Feature(s) Seven foot deep root pit K. George Beck |
 5360183 Twig(s)/Shoot(s) Russian knapweed buds in April K. George Beck |
 5364437 Seed(s) Seeds of Russian knapweed (Acroptilon repens). Howard F. Schwartz |
 5374233 Plant(s) in flower Joseph M. DiTomaso |
 5374234 Flower(s) Joseph M. DiTomaso |
 5374235 Plant(s) Joseph M. DiTomaso |
 5374236 Plant(s) fruiting Joseph M. DiTomaso |
 5374237 Foliage basal rosette Joseph M. DiTomaso |
 5376283 Fruit(s) base of achene Julia Scher |
 5376284 Fruit(s) Julia Scher |
 5376285 Fruit(s) Julia Scher |
 5376286 Seed(s) cross section Julia Scher |
 5391795 Flower(s) A young flower John M. Randall |
 5391796 Fruit(s) A seedhead John M. Randall |
 5391797 Foliage Conniving foliage John M. Randall |
 5391798 Infestation Harrassing a tree John M. Randall |
 5391799 Infestation Excluding all else John M. Randall |
 5391800 Infestation Nasty infestation John M. Randall |
 5391801 Flower(s) John M. Randall |
 5391802 Infestation John M. Randall |
 5391803 Flower(s) Nice flower John M. Randall |
 5391804 Plant(s) Dessicating John M. Randall |
