He shall speak for himself: "A crest of the bidens has significance.
"A Budget of Paradoxes, Volume II (of II)"
Augustus de Morgan
Eunotia bidens, Atlantic mud.
"The Student's Elements of Geology"
Sir Charles Lyell
bidens, two-teeth, or "pitchforks," as the boys call them, are welcomed by the eye when in late summer they make the swamps and wet waste places yellow with their blossoms.
"A Year in the Fields"
John Burroughs