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Weeds problematic for Australia's eco-system bio-diversity are what blue hound's tongue (Cynoglossum creticum), bridal creeper (Asparagus asparagoides), and fase yellowhead (Dittrichia viscosa) are. Bridal creeper already figures as one of Australia's 20 most aggressive, spreading, unwelcome invaders while blue hound's tongue and false yellowhead fill dubious niches among the top 20 itching to wreak environmental havoc.

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11y ago

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