Bidens tripartita

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Bidens tripartita is a common and widespread species of flowering plant in the sunflower family, Asteraceae, commonly known as three-lobe beggarticks,<ref>Template:Cite book</ref> three-part beggarticks, leafy-bracted beggarticks or trifid bur-marigold. It is native to much of Eurasia, North Africa, and North America, with naturalized populations in Australia and on some Pacific Islands.<ref name=":0">Template:GRIN</ref><ref name=":1">Template:Cite web</ref><ref name=":2">Flora of China, 狼杷草 lang pa cao, Bidens tripartita Linnaeus, Sp. Pl. 2: 831. 1753</ref><ref name=":3">Altervist Flora Italiana, Forbicina comune, Bidens tripartita L. includes photos, drawings, European distribution map</ref><ref name=":4">Template:Cite web</ref>

Distribution and abundance

Bidens tripartita is native to much of Eurasia, North Africa, and North America, with naturalized populations in Australia and on some Pacific Islands.<ref name=":0" /><ref name=":1" /><ref name=":2" /><ref name=":3" /><ref name=":4" /> Bidens tripartita is considered relatively rare in southwestern British Columbia and was likely introduced from eastern North America and Europe.<ref name=":5">Template:Cite web</ref>

Morphology

Bidens tripartita is an annual species with rigid stems and fibrous roots. Leaves are often deeply lobed. Flower heads are discoid and lacking ray flowers. Fruits are achenes.<ref name=":5" />