- Gaertner, Erika E. “The History and Use of Milkweed (Asclepias syriaca L.).” Economic Botany 33, no. 2 (1979): 119-23.
- Eric P. Eldredge, Milkweed Pollination Biology (Asclepias spp.) US Dept. of Agriculture, Natural Resources Conservation Service, Technical Note NV-58, Nov. 2015
- Plan to save monarch butterflies backfires, L. Wade 2015, Science, AAAS
See full list of Individual Species References.
Please also refer to the General Bibliography and Online Resources.