Gina Darin. Acroptilon repens, a dicot, is a perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Acroptilon repens (Linnaeus) de Candolle in A. P. de Candolle and ; Acroptilon picris (Pallas ex Willdenow) C. A. Meyer; C. picris Pallas ex Willdenow. Acroptilon repens. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences.
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The outer and middle involucral bracts are broad, striatesmooth with broadly rounded tips; the inner bracts are narrower with hairy tips. It is sensitive to decreased amounts of sunlight.
SEINet Portal Network – Acroptilon repens
Centaurea picris Pallas ex Willd. South Carolina Centaurea repens Russian knapweed Plant pest. Datasheet Rhaponticum repens Russian knapweed.
Wyoming Centaurea repens Russian knapweed Noxious weed.
Views Read Edit View history. Internet references from unknown authors have been numbered and can be found under the heading Internet references at the end of this document. Allelopathic and competitive interactions with crop plants can reduce yields.
Markers link to CCH specimen records. Generate a print friendly version containing only the sections you need. The key to revegetation is finding the proper wcroptilon. There are no studies available that tested controlled burning on infestations of Russian knapweed.
BoxLaramie, WY ; telephone: Taxonomic Tree Acropyilon of page Domain: Inner bracts are oblong-acuminate and cut-margined with hairy tips. Articles with ‘species’ microformats Taxonbars with 20—24 taxon IDs Taxonbars with automatically added basionyms.
A native to EurasiaRussian knapweed was introduced into North America in the late 19th century. This herbicide should be applied carefully to minimize the damage to non-target plants. Clopyralid may leach into groundwater and should be used carefully near streams and rivers.
Weed Science, 33 3: The fall search should focus on any late blooming plants that might have regrown from the root system of plants that had been pulled during an earlier search.
Acroptilon repens, Russian Knapweed
Flower and head types differ in form and sexual condition. Oregon Russian knapweed “B” designated weed Russian knapweed Quarantine. On rangeland, the reduction in forage following invasion of Russian knapweed can threaten the stability of ranching operations. The summer search should be conducted in July, when any missed plants have flowered and are easily recognizable. It occurs mostly in alkaline, seasonally wet habitats in Montana.
Journal of Plant Protection Research, 52 2: Fields, roadsides, and repen places; native of Asia, now widely established in w. Radiate heads have peripheral ray flowers and central disk flowers. Subanguina picridis likes moist areas during the winter and spring infection periods and does not flourish in dry areas.
Basal leaves are deeply lobed or pinnatifid, cm long and Data provided by the participants of the Consortium of California Herbaria. In other projects Wikimedia Commons Wikispecies. Seeds are viable for years, but longer with proper storage Zouhar, Magnoliophyta — Flowering plants. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds. Discussion View source History.
Cutting or mowing three times a year depletes nutrients in the roots, but unless mowing is continued, plants will recover. Biological Invasions, 14 6: Location, habitat, weather, and a variety of other conditions are factors that help determine the best treatment choice.