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Species
Information
- biddy-biddy
- Acaena
novae-zelandiae Kirk
- USDA
Symbol: ACNO4
- Oregon
Noxious Weed Designation: B
- Pictures
Identification: Perennial; grows 4 to 8 in tall. Spreads by stolons that root at the nodes, forming large mats where individual plants are indistinguishable. Stems prostrate to erect depending on conditions. Leaves alternate and compound, with mature plants having 5 to 11 leaflets 1/4-2/3 in long. Flower heads spherical, and turn into a round bur that disperses as a unit when mature.
Impacts: This low-growing plant prefers open, disturbed, well-drained sites, including stable dunes, open scrub, grassy areas, and trampled sites in coastal habitats where some summer moisture is available and frosts are infrequent. Plants thrive on poor soils but compete poorly against established vegetation. It causes problems on park and recreation land because of the thorniness of the burs on the seed heads and can be a pest in lawns.
Biological
Controls: No approved biological control agent is available.
Oregon
Maps of Biddy-biddy Distribution
Links:
USDA
Plants Database information on biddy-biddy
GRIN
Database information on biddy-biddy
Oregon Department
of Agriculture information on biddy-biddy
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