Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Gentianales
Family: Asclepiadaceae
Genus: Tweedia
Tweedia (syn Oxypetalum) is a genus of one species of straggling perennial grown for its clear pale blue, star shaped flowers, which are long lasting and cut well.
Cultivation
Tweedia require full sun in a well-drained soil that is dry. It is slightly frost hardy but requires little maintenance. Propagation is via seed.
Species
Tweedia caerulea (syn. Oxypetalum caeruleum) is a perennial plant to 3ft with heart shaped, gray-green, downy leaves. The summer flowers age to purple and are followed by 6in long, boat shaped seed pods.The seeds have downy parachute like tufts (cipsela).
T.c. Alba has white flowers.
T.c. Rosea has pink flowers
http://en.wikipedia.org/wiki/Tweedia
