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Bidens cernua (Stick-tight, smaller bur marigold)

Bidens cernua (Stick-tight, smaller bur marigold) specimen (handcolored), including flowers and leaves, identified as negative 1325

Bidens cernua (Stick-tight, smaller bur marigold)

Bidens cernua (Stick-tight, smaller bur marigold) specimen (handcolored), including flowers and leaves, identified as negative 1325

Bidens cernua (Stick-tight, smaller bur marigolds)

Bidens cernua (Stick-tight, smaller bur marigold) specimen (handcolored), including flowers and leaves, identified as negative 1324

Bidens cernua (Stick-tight, smaller bur marigolds)

Bidens cernua (Stick-tight, smaller bur marigold) specimen (handcolored), including flowers and leaves, identified as negative 1324

Bidens frondoasa and cernua (Leafy-bracted tickseed)

Bidens frondoasa to the left and cernua to the right (Leafy-bracted tickseed) specimens (handcolored), including flowers and leaves, identified as negative 1326

Bidens frondoasa and cernua (Leafy-bracted tickseed)

Bidens frondoasa to the left and cernua to the right (Leafy-bracted tickseed) specimens (handcolored), including flowers and leaves, identified as negative 1326

Bidens frondosa (Beggar-ticks; Boot-jacks)

Bidens frondosa (Beggar-ticks; Boot-jacks) specimen (handcolored), including flowers and leaves, identified as negative 999

Bidens frondosa (Beggar-ticks; Boot-jacks)

Bidens frondosa (Beggar-ticks; Boot-jacks) specimen (handcolored), including flowers and leaves, identified as negative 999

Botanical exhibits at Museum of Natural History, the University of Iowa, 1930s

Located in Macbride Hall, formerly known as the Hall of Natural Science.

Botany 2 classroom in the Chemistry Building, The University of Iowa, 1920s

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