Verbatim text: Spooner, D. M. 1984. Intraspecific variation in Gratiola viscidula Pennell (Scrophulariaceae). Rhodora 86: 79–87.
Author: Spooner, D.M.
Year: 1984
Title: Intraspecific variation in Gratiola viscidula Pennell (Scrophulariaceae)
Journal: Rhodora
Volume: 86
Pages: 79–87