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Pronunciation: ZAN-thee-um spy-NO-sum
Common name: Spiny cocklebur
Family: Asteraceae (Sunflower)
Habitat: Native or naturalized in disturbed, seasonally wet, often alkaline sites, in grassland, marshes, watercourses, old pastures and waste places to 4000' but mostly lower, widespread in California Floristic Province. Jepson eflora says perhaps native to South America only
Blooming period: July to October
Name derivations: 1) Xanthium 2) spinosum