Texas Wildflowers: A Field Guide, Loughmiller, Campbell and Loughmiller, University of Texas Press. 2018
Guide to Identifying Texas Milkweeds- Identification of Milkweeds in Texas
Milkweeds Xerces Society- Milkweeds: A Conservation Practitioner’s Guide | Xerces Society
Bluebonnets- Bluebonnet FAQ – Lady Bird Johnson Wildflower Center
Wildflowers of the Texas Hill Country- Enquist, Lone Star Botanicals, 1987
Wildflowers of Texas- Eason, Timber Press Field Guide 2018
Wildflowers of Texas, Ajilvsgi, Shearer Publishing. 1984
Southwestern and Texas Wildflowers, Niehaul, Ripper and Savage, Houghton/Mifflin. 1984
Wild Orchids of Texas, Liggio and Liggio, UT