Oxypetalum coeruleum

You only have to take one look at the blooms of Southern Star to understand why gardeners everywhere are so crazy about it. They are true blue, not purple or navy but actual blue flowers, a color not often seen in the plant world. This plant’s inflorescens in composed of a cluster of inch-wide star shaped blooms with each having a darker blue center. Sometimes called Heaven Born or Tweedia, it is native to Southern Brazil and Uruguay and belongs to the Milkweed family. Older plants can become somewhat vine-like but are easy to keep bushy by pinching. Keep this seldom available plant on the dry side and try not to crowd it.