- butterfly weed
- the root of this plant, formerly used as a cure for pleurisy
- The large tuberous root of a kind of milkweed (Asclepias tuberosa), used as a remedy for pleuritic and other diseases.
- The plant itself, which has deep orange-coloured flowers; butterfly weed.
Part or all of this entry has been imported from the 1913 edition of Websterâ€™s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.