Verbatim text: Semple, J. C. and F. D. Bowers. 1987. Cytogeography of Pityopsis Nutt., the grass-leaved goldenasters (Compositae: Astereae). Rhodora 89: 381–389.
Author: Semple, J.C., Bowers, F.D.
Year: 1987
Title: Cytogeography of Pityopsis Nutt., the grass-leaved goldenasters (Compositae: Astereae)
Journal: Rhodora
Volume: 89
Pages: 381–389