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Waterhemp or Lambsquarter?
by Bob Hartzler

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January 21, 2001 -  Is it mistaken identity, or just a bad photograph? - You make the call.

closead.jpg (27691 bytes)Closeup of seed in advertisement







hemp.jpg (15627 bytes)Waterhemp seed (Davis, L. W.  1993.  Weed Seeds of the Great Plains.)

Note:  Waterhemp seed are contained within the remnants of the flowers, and these remnants may  mask the shiny appearance of the seed pictured in the ad.  However, in my experience at least 25% of the seed breaks free of these floral parts when collected.  In addition, the few 'clean seeds' in the advertisement photo lack the normal shininess associated with waterhemp seed, but this may be an artifact of the photographer 'enhancing' the photo.




lamb.jpg (21219 bytes)Common lambsquarter seed.  (Davis, L. W.  1993.  Weed Seeds of the Great Plains.

Note:  Seed of lambsquarter is more likely to remain within the floral parts, as seen in this photo.






Prepared by Bob Hartzler, extension weed management specialist, Department of Agronomy, Iowa State University

For more information contact:
ISU Extension Agronomy
2104 Agronomy Hall
Ames, Iowa 50011-1010
Voice: (515) 294-1923
Fax: (515) 294-9985
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Common chemical and trade names are used in this publication. The use of trade names is for clarity by the reader. Inclusion of a trade name does not imply endorsement of that particular brand of herbicide and exclusion does not imply nonapproval.