1 Stir the dark soy sauce, soy sauce, sugar, and chile-garlic sauce together in a small saucepan and place over medium-how heat; simmer and stir until the sugar dissolves into the sauce, about 5 minutes. 2  Remove from heat and set aside.
Lesser Periwinkle or common periwinkle (vinca minor) is most often the species within the periwinkle family that is used for natural medicinal purposes. It is known as an astringent agent and as good for controlling excessive blood flow. In that last roll, it is used to treat wounds and to reduce menstrual flow.
As with any so-called invasive plant, its invasive properties are determined by location and planting situation. As noted, in some parts of the country, vinca is a listed invasive, escaping cultivation and invading natural woodland areas. In other parts of the country, it is only an aggressively spreading, shade loving groundcover.