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Bidens alba (Beggars tick)

Bidens alba (Beggars tick) specimen (black and white), including flowers and leaves, identified as negative 1325

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

Bidens alba (Beggars tick) specimen (black and white), including flowers and leaves, identified as negative 1324

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

Brassica nigra (Black mustard) specimens (black and white), including flowers and leaves, identified as negative 1322B

Brassica nigra (Black mustard) specimens (black and white), including flowers and leaves, identified as negative 1322A

Liatris scariosa (Blazing star) specimens (2, handcolored), including flowers and leaves, identified as negatives 1314 and 1315

Plant specimen (black and white), including flowers and leaves, identified as negative 1315

Plant specimen (black and white), including flowers and leaves, identified as negative 1314

Eupatorium perfoliatum (Boneset) specimen (handcolored), including flowers and leaves, identified as negative 1310

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