from the GNU version of the Collaborative International Dictionary of English
- proper n. A genus of plants of the Milkweed family, mostly woody climbers with fragrant flowers, several species of which furnish valuable fiber, and one species (Marsdenia tinctoria) affords indigo.
from The Century Dictionary and Cyclopedia
- n. A genus of plants of the natural order Asclepiadeæ, the milkweed family, type of the tribe Marsdenieæ.
Sorry, no etymologies found.