Habroanthus

Cortez III Service Corporation. 1994. Biological survey report for project at RENA Site. 8 June 1994. 8 pp.

Crosswhite, F. S. 1967. Revision of Penstemon Section Habroanthus (Scrophulariaceae 1: Conspectus. The American Midland Naturalist. Herbarium, Department of Botany, University of Wisconsin, Madison 53706. 3 p.