Phormidium purpuraecens

例句：

1. 1. The purpleflower aster is a popular choice for border plants.
   紫花地榆是一种受欢迎的边缘植物选择。
2. 2. In the spring, the purple flower aster blooms with vibrant color.
   春天，紫花地榆以鲜艳的颜色绽放。
3. 3. The purple flower aster has been used in traditional Chinese medicine for its medicinal properties.
   紫花地榆在传统中医中因其药用性质而被使用。