Dicotyledon | Literature for Xanthium strumarium
Lorence & Wagner, 2020. Literature for Xanthium strumarium var. canadense Wagner et al., 1990, 1999. |
Asteraceae -- The Sunflower Family | Bibliography |
Xanthium strumarium | |
Common name(s): cocklebur, kikania |
General Information | ||
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Distribution | Probably native to the New World, now a cosmopolitan weed.In the Hawaiian Islands, naturalized on Midway, Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i. |
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Habitat | Dry disturbed habitats | |
Habit |
Herb, 2‒20 dm tall, appressed pubescent or subglabrous. |
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Leaves |
Leaves petiolate; blade broadly ovate to reniform, 2‒8 cm long, 1.5‒10 cm wide, scabrous and glandular dotted, margin coarsely and irregularly toothed, base usually cordate; petiole 1.5‒10 cm long. |
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Flowers |
Heads in several to numerous short axillary inflorescences. |
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Fruit |
Burs broadly cylindrical to ovoid, ellipsoid, or sometimes subglobose, (1‒)1.5‒3.5 cm long, covered with stout, hooked prickles, terminated by 2 straight or incurved beaks. |
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Chromosomes |
2n = 36. |
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Contributor |
Nancy Khan |