Journal Article BUTTERFLYWEED REVISITED Get access Robert E. Woodson, Jr. Robert E. Woodson, Jr. Washington University St. Louis Missouri Search for other works by this author on: Oxford Academic Google Scholar Evolution, Volume 16, Issue 2, 1 June 1962, Pages 168–185, https://doi.org/10.1111/j.1558-5646.1962.tb03209.x Published: 01 June 1962 Article history Received: 28 March 1961 Published: 01 June 1962
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