Bidens bigelovii

A white-rayed (or discoid) Bidens in which the outer achenes are short, broad, and flattened.

A pseudanthium in Fillmore Canyon, west side of the Organ Mountains, 21 Sep 2008.

A pseudanthium along the Pine Tree Trail at Aguirre Springs on the east side of the Organ Mts., 24 Sep 2005.

Immature achenes at Aguirre Springs, 24 Sep 2005.

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