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Plants as Modified by Man

George Washington Carver's Iowa State Bachelors Thesis

George Washington Carver's Iowa State Bachelors Thesis

Erigeron strigosus (Daisy) specimen, including flower, leaves and root, identified as negative 158

Echinacea purpurea (Coneflower) specimen(black and white), including flowers and leaves, identified as negative 398

Populus tremuloides (Aspen) specimen (black and white), including flowers and leaves, identified as negative 469

Plant specimen (black and white), including flowers and leaves, identified as negative 669

Plant specimen (black and white), including flowers and leaves, identified as negative 686

Erigeron (Fleabane) specimens (handcolored), including flowers and leaves, identified as negative 872. Suburban Isle Park.

Erigeron (Fleabane) specimen (handcolored), including flowers and leaves, identified as negative 872. Location: Suburban Isle Park

Hieracium canadense (Canada hawkweed) specimen (handcolored), including flowers and leaves,identified as negative 880. Location: Spencer Creek

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