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Brassica nigra (Black mustard)

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

Taraxacum (Dandelion), in situ (handcolored), identified as negative 1219

Helianthus sp. (Sunflower) specimens (handcolored), including flowers and leaves, identified as negative 1177

Sicyos angulateo (One-seeded bur cucumber) specimen (handcolored), including flowers and leaves, identified as negative 1174

Trifolium repens (White clover) specimen (handcolored), including flowers and leaves, identified as negative 1034

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