References
Harms, R.T. 2011. A study of Chaptalia (Asteraceae: Mutisieae) in central, southern, and western Texas and the resurrection of Chaptalia carduacea. Lundellia 14: 8-26. Google Scholar
Harms, R.T. 2011. A study of Chaptalia (Asteraceae: Mutisieae) in central, southern, and western Texas and the resurrection of Chaptalia carduacea. Lundellia 14: 8-26. Google Scholar