Leigh A. Johnson

Johnson, L. A., & Weese, T. L. (2000). Geographic distribution, morphological and molecular characterization, and relationships of Lathrocasis tenerrima (Polemoniaceae). Western North American Naturalist, 60(4), 355–373.

Johnson, L. A., Soltis, D. E., & Soltis, P. S. (1999). Phylogenetic relationships of Polemoniaceae inferred from 18S ribosomal DNA sequences. PLANT SYSTEMATICS AND EVOLUTION, 214(1-4), 65–89. https://doi.org/10.1007/BF00985732