Asclepias verticillata has fine, needle-like foliage on un-branched stems and gives rise to creamy, white fragrant flowers in July and August. This tough, adaptable plant is a larval host and nectar source for the monarch butterfly. Does best in dry to moist soils in full sun.
For more information on this plant, visit the USDA PLANTS Database: http://plants.usda.gov/java/profile?symbol=ASVE