M.W.Turner (Lundell) 1996 - Turner MW (1996) Systematic study of the genusBrazoria (Lamiaceae), andWarnockia (Lamiaceae), a new genus from Texas. Plant Systematics and Evolution 203(1-2): 65-82. doi: 10.1007/BF00985237.
There is no corrections for Brazoria truncata var. pulcherrima yet.