This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Blue Sailors: Bunk:
Cichorium Intybus. Composite Family. July - Oct.
Found in fields, waste places, along roadsides. Newfoundland to Minnesota and southward. Naturalized from Europe.
Blue, violet-blue, lavender, rays finely toothed on the tips; flowers borne at intervals on branching stems 1 - 3 feet high.
Oblong or lance-shaped, coarsely toothed, partly clasping.

Chicory.
 
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