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Silphium perfoliatum (Cup plant)

Silphium perfoliatum (Cup plant), in situ on low prairie (handcolored)

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

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

Rudbeckia hirta (Black-eyed Susan) specimen (handcolored), including flowers and leaf, identified as negative 900. Location: Suburban Isle Park

Rudbeckia hirta (Black-eyed Susan) specimen (handcolored), including flowers and leaf, identified as negative 900. Location: Suburban Isle Park

Rosa arkansana (Prairie rose), in situ (handcolored)

Rosa arkansana (Prairie rose), in situ (handcolored)

Quercus alba (White oak) specimen (black and white), including flowers and leaves

Quercus alba (White oak) specimen (black and white), including flowers and leaves

Prenanthes (Rattlesnake root) specimen (handcolored), including flowers and leaves, identified as negative 1472

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