Verbatim text: Hartman, R. L. 1990. A conspectus of Machaeranthera (Asteraceae: Astereae). Phytologia 68: 439–465.
Author: Hartman, R.L.
Year: 1990
Title: A conspectus of Machaeranthera (Asteraceae: Astereae)
Journal: Phytologia
Volume: 68
Pages: 439–465
BHL link: http://www.biodiversitylibrary.org/part/26461