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  • Lagarosiphon major

      Unwanted Organism, National Pest Plant Accord
    • Scientific Name: Lagarosiphon major
    • Origin: Introduced plant. Native to Africa
    • Type: Weed
    • Plant Life-form Type: Submerged
    • Taxonomy: (Ridley) Moss ex Wager
    • Presence: Widely naturalised in North Island and lowland northern and eastern South island, rare in Westland and upland South island, first record from Waiwhetu Stream, Wellington in 1950
    • Habitat: Moderately fast flowing to still water bodies
    • Temperature (°C): 15 - 25
    • pH range: 6.0 - 8.0
    • Hardness (ppm): 30 - 200
    • Light: Medium
    • Height: 2000mm
    • Difficulty: Easy
    • Notes: Major impacts on indigenous plant biodiversity and recreation. No longer allowed as a pond plant or in coldwater tanks. A pest plant. This is one of 4 plants sometimes sold as OXYGEN WEED. A big problem in lake Taupo and the Waikato river.
    • Propagation: New plants develop from stem fragments. There is no seed production in New Zealand, with only the female plants of this species being present here
    • Features: Leaves are alternate and curved downwards and 6-20 mm long. Stems are slender, brittle, and much branched.
    • Source: TIFBIS
    • Regional: Regional Pest Management Strategy: BOP*, OTA*, MWT, NSN/TAS, STL, AUK, CAN, HKB, MBH, TKI, WTC.
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