Reference:Helton1972a
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Verbatim text: Helton, N., D. Wiens, and B. A. Barlow. 1972. High polyploidy and the origin of Balsamorhiza macrophylla. Madroño 21: 526–535.
Author: Helton, N., Wiens, D., Barlow, B.A.
Year: 1972
Title: High polyploidy and the origin of Balsamorhiza macrophylla
Journal: Madroño
Volume: 21
Pages: 526–535