Usually, wigwams are a domed structure; Conical wooden wigwams are known (as seen here in the background), though, and presumably gave rise to confounding of the different structures. For more, see: Notes on the Eastern Cree and Northern Saulteaux, Volumes 9-10. By Alanson Skinner. The Trustee, 1911. p12+13.
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lccn.loc.gov
Buechel, Eugene (1983) [1970]. 《Lakota-English Dictionary》. Red Cloud Indian School. 489쪽. ISBN0-8032-6269-8. LCCN74-114669.