For Asclepias
Endress, M.E., U. Meve, D.J. Middleton, and S. Liede-Schumann. 2018. Apocynaceae. In Kadereit, J., & V. Bittrich. 2018. The families and genera of flowering plants. XV. Flowering plants. Eudicots. Apiales, Gentianales (except Rubiaceae). Springer, Cham.
Farmer, J., and C.R. Bell. 1985. A new combination in Asclepias. Phytologia 57: 380.
Fishbein, M. 2023a. Asclepias. In Flora of North America Editorial Committee. 2023c. Flora of North America north of Mexico. Volume 14, Magnoliophyta: Gentianaceae to Hydroleaceae. Oxford Univ. Press, New York, NY. 505 pp.
Fishbein, M., D. Chuba, C. Ellison, R.J. Mason-Gamer, and S.P. Lynch. 2011. Phylogenetic relationships of Asclepias (Apocynaceae) inferred from non-coding chloroplast DNA sequences. Systematic Bot. 36: 1008-1023.
Turner, B.L. 2009b. Taxonomy of Asclepias hirtella and A. longifolia (Apocynaceae). Phytologia 91: 308-311.
Woodson, R.E., Jr. 1954. The North American species of Asclepias L. Ann. Missouri Bot. Garden 41: 1-211.
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