Westringia is a genus of Australian shrubs. As with other members of the mint family their upper petal is divided into two lobes. There are four stamens - the upper two are fertile while the lower two are reduced to staminodes.
The flowers are white, hairy and have the upper petal divided into two lobes. They also have orange-to-purply spots on their bottom half. This shrub is very tough and grows on cliffs right next to the ocean.
The plant's tolerance to a variety of soils, the neatly whorled leaves and all-year flowering make it very popular in cultivation.
Blue Gem is an improved seedling selection of the Australian-native “coastal rosemary” that was selected for one simple reason: it’s flowers. In late winter/ early spring, Blue Gem will be completely covered with vivid…almost fluorescent flowers. Coastal rosemary, so named for its rosemary-like leaves, is drought tolerant, salt tolerant, has some frost tolerance and some varieties, including Blue Gem, are proving to be adapt to humid, subtropical climates of the southeastern US. Good for home gardens and commercial landscapes alike. Westringia are best suited to Mediterranean climates but, as mentioned, Blue Gem is showing promise for the South.
Sourse-:http://tuffyplants.com/westringia-blue-gem/
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