Reference:Howell1929a
Verbatim text: Howell, J. T. 1929. A systematic study of the genus Lessingia Cham. Univ. Calif. Publ. Bot. 16: 1–44.
Author: Howell, J.T.
Year: 1929
Title: A systematic study of the genus Lessingia Cham
Journal: Univ. Calif. Publ. Bot
Volume: 16
Pages: 1–44